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Choose a table:
Medicines (732)
Medicines
> starting dose:
60 mg PO BID or 180 mg PO once daily
&
onset:
1-2 hours
&
halflife:
~14 hours'"`UNIQ--ref-00000CCC-QINU`"'
Use the filters below to narrow your results.
generic:
Fexofenadine (1)
brand:
Allegra, Allegra Allergy 24 Hour, Mucinex Allergy (combo) — all now OTC in US (1)
classes:
[[:Category:Antihistamines|Antihistamine]] (1)
·
[[:Category:H1_receptor_antagonists|Histamine H1 receptor antagonist (second-generation)]] (1)
mechanism:
'"`UNIQ--vote-00000CC9-QINU`"' Mostly excreted unchanged in feces and urine; P-glycoprotein substrate (the basis of the fruit-juice interaction). (1)
uses:
'"`UNIQ--vote-00000CCA-QINU`"', '"`UNIQ--vote-00000CCB-QINU`"' (1)
starting dose:
(Click arrow to add another value)
None
·
~10 units SC at the same time daily, or 0.1-0.2 units/kg/d; titrate by fasting glucose
·
'''5 mg PO at bedtime for women, 5-10 mg for men''' (per FDA's 2013 sex-specific dose reduction for women due to slower clearance). Ambien CR 6.25 mg women / 6.25-12.5 mg men. Intermezzo SL 1.75 mg women / 3.5 mg men
·
0.25 mg
·
0.4 mg PO daily (general prevention); 0.8-1 mg/d in pregnancy; 4 mg/d for women with prior NTD-affected pregnancy; 1 mg/d during methotrexate therapy
·
0.4 mg PO once daily, 30 minutes after the same meal each day
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0.5 mg PO once daily
·
0.5-1 mg PO/IV once or twice daily; titrate to clinical response. Approximate equipotency: bumetanide 1 mg ≈ furosemide 40 mg ≈ torsemide 20 mg
·
0.5-2 mg/kg/d divided or single morning dose for acute conditions; lowest effective dose for chronic conditions, with planned taper
·
0.5-3 mg PO 30-60 minutes before bedtime. Some patients respond to micro-doses (0.3 mg) without additional benefit at higher doses. For circadian phase shifting, timing relative to dim-light melatonin onset matters more than absolute dose
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0.5–1 oz (10–30 g) ground for psychoactive effect; far smaller for culinary use
·
0.75 mg SC weekly'"`UNIQ--ref-00000053-QINU`"'
·
1 capsule (20/10 mg dextromethorphan/quinidine) PO once daily × 7 days, then 1 capsule BID
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1 drop in affected eye(s) TID (monotherapy); BID with timolol (Cosopt)
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1 drop in the affected eye(s) once daily in the evening
·
1 drop in the affected eye(s) once daily in the evening (Lumigan); Latisse applied to upper lash line at bedtime
·
1 g PO QID on an empty stomach (1 hour before meals and at bedtime); 1 g BID for maintenance
·
1 mg at bedtime (PTSD nightmares); 1 mg BID–TID (HTN)
·
1 mg PO at bedtime to limit first-dose syncope; titrate weekly to 5-10 mg
·
1 mg PO once daily
Other values:
1 tablet (4.8355 mg oxycodone / 325 mg aspirin) PO every 6 hours as needed
1 tablet (85/500 mg sumatriptan/naproxen) PO at migraine onset; may repeat after 2 hours if needed; maximum 2 tablets per 24 hours
1 tablet (dextromethorphan 45 mg / bupropion 105 mg) PO daily × 3 days, then increase to 1 tablet BID
1-2 capsules (50 mg butalbital / 325 mg acetaminophen / 40 mg caffeine each) PO every 4 hours as needed; maximum 6 capsules/d
1-2 capsules (50 mg butalbital / 325 mg aspirin / 40 mg caffeine each) PO every 4 hours as needed; maximum 6 capsules/d
1-2 mg PO once daily with breakfast; titrate by glycemic response
1-2 tablets (15-60 mg codeine, 300-600 mg acetaminophen) PO every 4-6 hours as needed
1.6 mcg/kg/d in young healthy adults; 25-50 mcg/d in elderly or cardiac disease, titrated by TSH at 6-8 weeks
10 mg
10 mg (one spray) intranasally in one nostril
10 mg PO 30 min before bedtime (with ≥7 hours of sleep planned)
10 mg PO once daily
10 mg PO once daily (5 mg if on a diuretic); titrate to 40 mg
10 mg PO once daily (5 mg in older adults or if sedation occurs)
10 mg PO once daily in the evening (adults); 4-5 mg in children
10 mg PO once daily in the morning; 5 mg starting in heart failure
10 mg PO once daily in the morning; may titrate to 25 mg for additional glycemic effect
10 mg PO once daily × 7 days, then 20 mg × 7 days, then 40 mg as target dose (take with food)
10 mg PO once daily, with or without food
10 mg PO once daily; may increase to 20 mg as tolerated, or decrease to 5 mg if needed
10 mg PO once daily; titrate to 20 mg/day after 1-2 weeks if needed
10 mg PO/IV/IM QID, '''not to exceed 12 weeks''' (tardive dyskinesia risk); intranasal Gimoti 15 mg BID
10 mg PRN; 2.5–5 mg daily for continuous coverage / BPH
10 mg ~1 h before sexual activity
10 mg/kg IV every 2 weeks
10-20 mEq PO daily for prevention; treat established hypokalemia per measured deficit, typically 40-100 mEq/d in divided doses; IV 10 mEq/h peripheral, 20 mEq/h central with telemetry
10-20 mg PO once daily
10-20 mg PO once daily (5 mg in Asian ancestry, elderly, hypothyroidism, or strong CYP/SLCO1B1 interactions)
10-20 mg PO once daily in the evening (40 mg starting allowed for high CV risk)
10-20 mg PO/IV once daily; titrate by clinical response. 1:1 IV to PO conversion (unlike furosemide's 1:2)
10-40 mg PO daily depending on hyperthyroidism severity; titrate by clinical and biochemical response (target TSH/free T4)
100 mg IV every 3 months; may increase to 300 mg IV every 3 months
100 mg PO BID × 5 days (Macrobid) for cystitis; 50-100 mg HS for chronic prophylaxis
100 mg PO BID; rickettsial 200 mg/d; doxy-PEP 200 mg within 72 hours after condomless sex
100 mg PO once daily (50 mg if CrCl 30-44; 25 mg if <30 or dialysis)
100 mg PO once daily; titrate by 100 mg every 2-4 weeks to a serum urate target (typically <6 mg/dL, or <5 in tophaceous disease)
100 mg at bedtime daily
100 mg ~15 min before sexual activity
100-200 mg PO TID (max 600 mg/d)
100-200 mg PO TID after meals × no more than 2 days when used with concurrent antibiotic
100-200 mg PO once or twice daily; pediatric weight-based
1000 mg PO once daily; 500-2000 mg/d in single or divided doses
10–40 mg (situational anxiety); 40 mg BID (HTN)
12.5-25 mg PO once daily
12.5-25 mg PO once daily; titrate to 50 mg
140 mg SC every 2 weeks OR 420 mg SC monthly (3 consecutive injections 5 minutes apart due to volume)
145 mcg PO once daily for chronic idiopathic constipation; 290 mcg daily for IBS-C; pediatric 72 mcg daily
15 mg PO at bedtime, titrate to 30-45 mg/day after 1-2 weeks. '''Counterintuitive dose paradox''': lower doses (7.5-15 mg) are more sedating than higher doses because H1 antihistamine effect dominates at low dose
15-30 mg PO once daily; titrate to 45 mg
15-37.5 mg PO once daily before breakfast or 1-2 hours after; Lomaira 8 mg TID
150 mg PO once daily; titrate to 300 mg if needed
18 mcg DPI once daily (HandiHaler); 2.5 mcg per actuation × 2 inhalations once daily (Respimat)
2 g PO BID with meals (4 g/d total)
2 mg PO every 6-8 hours; titrate by 2-4 mg per dose every 1-4 days; maximum single dose 16 mg, maximum daily dose 36 mg
2 tablets (75 mg tramadol / 650 mg acetaminophen) PO every 4-6 hours as needed; maximum 8 tablets/day for ≤5 days
2.25 g at bedtime + 2.25 g 2.5–4 h later; titrate weekly to 6–9 g/night total
2.5 mg IR, 5 mg XR, or 12.5mg Mydayis
2.5 mg PO once daily (1.25 mg in CHF or volume depletion); titrate to 5-10 mg/d
2.5 mg SC weekly × 4 wk (non-therapeutic ramp)'"`UNIQ--ref-000002FB-QINU`"'
2.5-5 mg PO once daily; titrate to 10 mg/d
2.5–5 mg daily (HTN); 1.25 mg daily (HFrEF, slow titration)
20 mg PO QID (start 10 mg and titrate); IM 20 mg q6h short-term
20 mg PO once daily 30-60 minutes before breakfast
20 mg PO once daily with the evening meal; titrate to 40-80 mg/d
20 mg PO once daily; titrate to 40 mg/d after 2 weeks if needed
20 mg PO once daily; titrate to 40 mg/day after 1 week if tolerated. Elderly (>60) and hepatic impairment: 20 mg/day ceiling
20 mg PO twice daily, or 40 mg at bedtime
20-40 mg PO once daily, 30-60 minutes before breakfast
20-40 mg PO/IV; titrate by clinical response. In diuretic-resistant heart failure or CKD, doses to 200 mg or higher may be needed
200-400 mg PO daily; '''dose by actual body weight ≤5 mg/kg/d''' to reduce retinopathy risk (AAO 2016 guideline)
200-400 mg PO every 4-6 hours as needed. OTC max 1200 mg/day without provider direction; prescription max 3200 mg/day divided
200-400 mg PO q4h (IR); 600-1200 mg PO q12h (Mucinex 12-Hour ER)
225 mg SC monthly, or 675 mg SC every 3 months (quarterly)
25 mg
25 mg (schizophrenia, immediate-release); 50 mg (bipolar mania, immediate-release); 50 mg (Seroquel XR, schizophrenia or bipolar)
25 mg PO at bedtime (no titration); may increase to 50 mg if 25 mg inadequate
25 mg PO once daily for HFrEF and primary aldosteronism; up to 100 mg/d for ascites; 50-200 mg/d for hirsutism
25 mg PO once daily; titrate to 50 mg after 4-8 weeks if needed
25-50 mg PO once daily; titrate to 100 mg/day
250-500 mg PO BID × 7-14 days; IV 1.5 g q8h for serious infections
250-500 mg PO QID; 7.5-12.5 mg/kg IV q6h; topical and ophthalmic per formulation
250-500 mg PO every 6-8 hours
25–50 mg BID (tartrate); 25–100 mg daily (succinate); 12.5 mg daily in HFrEF
30 mg PO daily (1/2 grain); titrate by TSH at 6-8 weeks; 60 mg desiccated thyroid is approximately equivalent to 88-100 mcg levothyroxine
300 mg PO BID, or 600 mg PO once daily, ×5-10 days; pediatric 14 mg/kg/d
300 mg PO at bedtime night 1, 300 mg BID day 2, 300 mg TID day 3; titrate to clinical effect, commonly 1800-3600 mg/day divided TID
325 mg PO daily to TID (=65 mg elemental iron/tablet); alternate-day dosing is now favored by hepcidin physiology for better absorption with less GI burden
325-1000 mg PO every 4-6 hours as needed; maximum 4 g/d in healthy adults, 3 g/d in regular users or hepatic risk; pediatric 10-15 mg/kg every 4-6 hours
34 mg PO once daily
4 L oral solution (GoLYTELY-class) split-dose: 2 L evening before, 2 L morning of procedure; low-volume products (MoviPrep, Plenvu) use 1-2 L with required clear-fluid intake
4 g PO daily (as 4 x 1 g capsules once daily, or 2 capsules BID)
4 mg PO initially, then 2 mg after each loose stool, '''not to exceed 16 mg/d''' (8 mg OTC); chronic-use lower
4-8 mg PO or IV every 8 hours as needed; 16 mg single dose preoperatively for PONV prevention
40 mg PO once daily (10-20 mg in elderly, hepatic impairment, or strong drug interactions)
40 mg PO once daily; titrate to 80 mg
40 mg PO or IV once daily
40 mg SC every other week (most adult indications); IBD induction 160 mg week 0, 80 mg week 2, then 40 mg every other week
400 mg PO/IV once daily
42 mg PO once daily with food (no titration)
5 mg / 325 mg PO every 4-6 hours as needed; total acetaminophen <3 g/d
5 mg PO
5 mg PO TID or 7.5 mg PO BID; titrate by 5 mg every 2-3 days to clinical effect, commonly 30-60 mg/day divided BID-TID
5 mg PO at bedtime; may increase to 10 mg if inadequate
5 mg PO daily for BPH; 1 mg PO daily for androgenetic alopecia
5 mg PO once daily (no renal dose adjustment, unlike sitagliptin)
5 mg PO once daily at bedtime; titrate to 10 mg/day after 4-6 weeks. Severe Alzheimer disease: may escalate to 23 mg/day. Adlarity patch: 5 or 10 mg/day applied weekly
5 mg PO once daily in the evening
5 mg PO once daily, 30 minutes before breakfast; XL: 5 mg with breakfast
5 mg PO once daily; titrate by 5 mg weekly to target 10 mg PO BID. XR formulation: 7 mg/day, titrate to 28 mg/day
5 mg PO once daily; titrate to 10 mg after 2 weeks if needed
5 mg daily
5-10 mg PO at migraine onset; may repeat after 2 hours, maximum 30 mg/24 hours
5-10 mg PO once daily (2.5 mg if on diuretic or in heart failure); titrate to 10-20 mg BID for HFrEF
5-10 mg PO once daily (2.5 mg in heart failure, hyponatremia, or volume depletion)
5-15 mg PO once at bedtime; 10 mg PR for faster effect; bowel prep regimens use higher single doses
50 mg PO BID; titrate to 100-200 mg BID; pill-in-pocket 200-300 mg PO single dose for AF conversion
50 mg PO at bedtime; titrate by 50 mg every 4-7 days to clinical effect. Total daily doses >100 mg divided BID. Luvox CR: 100 mg PO once daily, may titrate to 300 mg/day
50 mg PO daily (25 mg in volume depletion or hepatic impairment)
50 mg PO once daily ('''no titration required''', distinguishing it favorably from venlafaxine)
50 mg PO once daily with fatty food in the evening × 14 days
50 mg ~1 h before sexual activity (ED); 20 mg TID (PAH)
500 mg PO TID or 875 mg PO BID for most indications; 80-90 mg/kg/d divided BID in pediatric otitis media
500 mg PO TID × 7-10 days (most indications); 2 g single dose for trichomoniasis; 500 mg IV q8h for severe anaerobic infection; rectal 1 g BID
500 mg PO day 1, then 250 mg PO daily days 2-5 (Z-Pak); 1 g PO single dose for chlamydia; pediatric dosing 10 mg/kg day 1, 5 mg/kg days 2-5
500 mg PO every 6 hours, or 250 mg every 6 hours for mild infections
500 mg PO once or twice daily with meals; titrate weekly to limit GI effects
500-750 mg PO BID; 400 mg IV q8-12h
500-750 mg PO/IV once daily
6/25 mg PO once daily in the evening; titrate within range 3/25 to 18/75 mg by clinical response and tolerability
60 mg PO BID or 180 mg PO once daily
7.5 mg PO once daily; titrate to 15 mg daily if needed. Vivlodex 5 mg PO once daily, max 10 mg
70 mg SC monthly; may increase to 140 mg monthly
700 mg IV q4w × 3 doses, then 1400 mg IV q4w; may discontinue when amyloid PET shows clearance
75 mg PO once daily for maintenance; 300-600 mg PO loading dose in ACS or before PCI
80-160 mg PO once daily (40 mg BID in HFrEF, titrating up to 160 mg BID)
A ''marduuf'' bundle (~50 g fresh leaves) chewed over a couple of hours
A measured pour of absinthe diluted 5:1 with cold water over sugar (the louche ritual)
ACS/PCI: 180 mg PO loading dose, then 90 mg PO BID for 12 months; long-term post-MI: 60 mg BID
ADHD (Kapvay ER): 0.1 mg PO at bedtime, titrate weekly to 0.4 mg/day divided BID. HTN (IR): 0.1 mg PO BID, titrate by 0.1 mg increments
ADHD: 30 mg PO once daily in the morning; titrate by 10-20 mg weekly to clinical effect. Binge-eating disorder: 30 mg/day, titrate to 50-70 mg/day
Active UC: Lialda 2.4-4.8 g PO once daily, Apriso 1.5 g PO once daily; maintenance 1.2-2.4 g/d; rectal Rowasa enema 4 g HS for distal disease; Canasa 1 g suppository HS for proctitis
Acute gout: 1.2 mg PO at first symptom, then 0.6 mg 1 hour later (total 1.8 mg in 1 hour, the FDA-revised regimen); prophylaxis 0.6 mg PO daily or BID; FMF 1-2 mg/d; pericarditis 0.5-0.6 mg BID for 3 months; Lodoco 0.5 mg PO daily for CV risk reduction
Acute gout: 50 mg PO TID until symptom relief, then taper; maximum 200 mg/day for 3-5 days. Rheumatoid arthritis / osteoarthritis: 25-50 mg PO BID-TID. Patent ductus arteriosus: 0.2 mg/kg IV, then 0.1-0.2 mg/kg every 12-24 hours for 2 doses
Acute migraine: 75 mg PO at onset, maximum one dose per 24 hours. Preventive: 75 mg PO every other day
Adult monotherapy: 300 mg PO BID, titrate by 300 mg every 3 days. Pediatric: weight-based titration starting 8-10 mg/kg/day divided BID
Adult: 15–60 mg every 4 hours as needed.
Adult: 500 mg PO BID, titrate by 1000 mg/day every 2 weeks. Pediatric: 10-20 mg/kg/day divided BID, weight-titrated
Allergy: 25 mg PO BID-QID. Nausea/vomiting: 12.5-25 mg PO/IM/IV/PR every 4-6 hours. Motion sickness: 25 mg PO 30-60 minutes before travel. '''Pediatric <2 years: contraindicated'''
Allergy: 25-50 mg PO every 4-6 hours. Insomnia: 25-50 mg PO at bedtime. IV (acute dystonia, severe allergic reaction): 25-50 mg slow IV push
Allergy: 4 mg PO TID. Serotonin syndrome: 12 mg loading dose PO or by nasogastric tube, then 2 mg every 2 hours until clinical improvement. Appetite stimulation: 2-4 mg PO TID-QID
Anaphylaxis IM 0.3-0.5 mg (adult) into lateral thigh, repeat q5-15 minutes prn; pediatric 0.01 mg/kg IM (max 0.3 mg, max 0.5 mg in adolescents); cardiac arrest 1 mg IV/IO q3-5 minutes; severe asthma neb 0.1 mg/kg up to 5 mg; never IV bolus for anaphylaxis outside critical care
Antenatal: Celestone Soluspan 12 mg IM q24h × 2 doses; topical: pea-sized amount BID; intra-articular varies by joint
Antiplatelet: 81 mg PO once daily. Acute MI/stroke: 162-325 mg chewed. Analgesic: 325-650 mg PO every 4-6 hours as needed
Anxiety: 0.25 mg PO BID, titrate by 0.125-0.25 mg every 3 days to target 1-4 mg/day divided. Seizures: 1.5 mg/day divided TID, titrate by 0.5-1 mg every 3 days
Anxiety: 0.5-1 mg PO BID-TID. Insomnia: 1-2 mg PO at bedtime. Status epilepticus: 4 mg IV (adult), repeat after 5-10 minutes if needed. Acute agitation: 1-2 mg IM
Anxiety: 2-10 mg PO 2-4 times daily. Alcohol withdrawal: 10-20 mg PO/IV every 4-6 hours, symptom-triggered. Status epilepticus: 5-10 mg IV. Breakthrough seizures: Diastat rectal 0.2-0.5 mg/kg or Valtoco intranasal 5-20 mg
Anxiety: 25-50 mg PO QID. Pruritus: 25 mg PO TID-QID. Insomnia: 25-50 mg PO at bedtime. Pediatric: 50-100 mg/day divided
Apply a thin film to affected area BID; '''limit to 2 weeks''' continuous use and ≤50 g/week (cream/ointment); ≤50 mL/week (foam/solution); avoid face, intertriginous areas
Apply thin layer to hyperpigmented areas BID; limit to 4-6 month courses to avoid ochronosis
Byetta: 5 µg SC twice daily, within 60 min before morning and evening meals'"`UNIQ--ref-000000E3-QINU`"' · Bydureon BCise: 2 mg SC once weekly'"`UNIQ--ref-000000E4-QINU`"'
Children ≤70 kg: 0.5 mg/kg/day, titrate to 1.2 mg/kg/day after 3 days. Adults and children >70 kg: 40 mg PO once daily for 3 days, then 80 mg/day, then if needed 100 mg/day after 2-4 weeks
Chronic migraine (PREEMPT protocol): 155 units divided across 31 sites in 7 head/neck muscle groups every 12 weeks
Constipation: 15-30 mL PO daily (titrate to 1-2 soft stools/day); hepatic encephalopathy: 20-30 g (30-45 mL) PO/PR every 1-2 hours acutely until soft stools, then BID-QID to target 2-3 soft stools/day
Constipation: 17 g (one capful) PO daily dissolved in 4-8 oz fluid; bowel prep: 4 L of PEG-electrolyte solution split-dose evening before and morning of procedure
Contraception: Depo-Provera 150 mg IM every 13 weeks; Depo-SubQ 104 mg SC every 12-13 weeks; oral cycling: 5-10 mg PO daily ×5-10 days for amenorrhea
Deficiency: 50,000 IU PO weekly for 8-12 weeks, then maintenance 800-2,000 IU/day; maintenance OTC dosing typically 800-2,000 IU/d
Depression (rarely used now): 25-75 mg PO at bedtime, titrate to 150 mg/day. Neuropathic pain / migraine prophylaxis: 10-25 mg at bedtime, titrate by 10-25 mg weekly to 50-100 mg/day. Elderly: 10 mg at bedtime (Beers-list cautions apply)
Depression: 25 mg PO TID-QID or 75 mg at bedtime, titrate to 75-150 mg/day. Neuropathic pain: 10-25 mg at bedtime, titrate to 50-100 mg/day. Elderly: 10 mg at bedtime (Beers-list cautions, though less than amitriptyline)
Depression: 25-75 mg/day to start, titrate to 75-150 mg/day at bedtime. Insomnia (Silenor): 3 mg PO 30 minutes before bedtime, max 6 mg. Topical (Prudoxin): apply to affected area every 3-4 hours
ER 180-240 mg PO once daily; IR 30 mg PO QID; IV 0.25 mg/kg over 2 min for acute rate control, then 5-15 mg/h infusion
ER 30-60 mg PO once daily; immediate-release 10 mg PO TID (now rarely used for hypertension due to reflex tachycardia)
For patients already stable on memantine 28 mg/d + donepezil 10 mg/d, switch to one capsule daily of equivalent strength
Formulation-dependent. Gels: 40–50 mg topically daily. Cypionate/enanthate IM: 50–100 mg weekly. Undecanoate IM: 750 mg q10w. Patch: 4 mg/d.
General supplementation 75-90 mg/d (RDA); scurvy treatment 100-1000 mg/d for several weeks; megadose claims unsupported
HRT cyclic: 200 mg PO HS days 1-12 of each month; continuous: 100 mg PO daily; ART luteal support 100 mg vaginal TID or 90 mg gel daily
Heart failure: 3.125 mg PO BID, doubling every 2 weeks as tolerated to target 25 mg BID (50 mg BID if >85 kg). Hypertension: 6.25 mg PO BID, titrate to 25 mg BID
Hypothyroidism: 5-25 mcg PO daily (start low, titrate slowly); myxedema coma: 5-20 mcg IV q4-12h with T4 loading
ICS Pulmicort Flexhaler 180-360 mcg BID; intranasal Rhinocort 64 mcg/spray, 1-2 sprays/nostril daily; Entocort EC 9 mg PO daily for active Crohn's; Symbicort 80/4.5 or 160/4.5 mcg, 2 puffs BID
IM: 60 mg single dose or 30 mg every 6 hours. IV: 30 mg every 6 hours. Oral (continuation only): 10-20 mg every 4-6 hours. Sprix nasal: 31.5 mg every 6-8 hours. '''Maximum 5 days total combined use'''
IR 1 mg PO at bedtime, titrate weekly; XL 4-8 mg PO daily
IR 200-400 mg PO every 6-8 hours; ER 400-1000 mg PO once daily
IR 5 mg PO BID-TID; ER 5-10 mg PO daily, titrate; transdermal patch 3.9 mg/d twice weekly (OTC)
IR 5 mg PO TID; titrate to 10 mg TID if needed. Amrix ER 15 mg PO once daily. Off-label insomnia / fibromyalgia: 5-10 mg PO at bedtime
IR 80-120 mg PO TID; ER 180-240 mg PO daily; IV 2.5-5 mg over 2 min for SVT termination (under monitoring); cluster prophylaxis up to 480-960 mg/d in divided doses
IR opioid-naive: 5-10 mg PO every 4-6 hours as needed. ER opioid-naive: '''10 mg PO every 12 hours (lowest available)'''; titrate slowly to clinical effect
IR oral 50 mg PO TID or 75 mg BID. Voltaren 1% gel: apply 2-4 g to affected area QID. Pennsaid 2%: 40 drops to knee BID. Flector patch: every 12 hours
IR oral: 15-30 mg every 4 hours as needed. ER opioid-naive: 15-30 mg every 12 hours. IV/IM/SC: 2-10 mg every 3-4 hours. Epidural / intrathecal: see surgical or palliative-care protocols
IR: 25-50 mg PO every 4-6 hours as needed, titrate as tolerated. ER: 100 mg PO once daily, titrate by 100 mg every 5 days
IR: 60 mg PO every 4-6 hours. 12-hour ER: 120 mg PO every 12 hours. 24-hour ER: 240 mg PO once daily. Pediatric: weight-based
IV: 1 mEq/kg bolus in arrest indication, then titrated to ABG and clinical status; PO: 325-2000 mg up to QID as antacid
IV: traditional 1-1.7 mg/kg q8h or extended-interval 5-7 mg/kg q24h with target-trough monitoring; inhaled CF 300 mg BID × 28 days on / 28 days off; ophthalmic 1-2 drops in affected eye(s) q4h
Indication-specific: 0.5-9 mg PO/IV daily for inflammation; 4 mg IV q6h for cerebral edema; 40 mg PO once weekly in MM; 6 mg PO/IV daily ×10 days for severe COVID-19; 0.6 mg/kg PO single dose for croup (max 16 mg)
Induction (TRD): 56 mg intranasal twice weekly × 4 weeks. Maintenance: 56-84 mg once weekly × 4 weeks, then 56-84 mg every 1-2 weeks. For acute suicidality: 84 mg twice weekly × 4 weeks. Administered under medical supervision in REMS-certified site.
Induction: 2/0.5 to 4/1 mg SL once in moderate withdrawal; titrate to 12–16/3–4 mg/d by day 2–3
Infiltration: 1-2% solution; '''4.5 mg/kg ceiling without epinephrine, 7 mg/kg with epinephrine'''. IV antiarrhythmic: 1-1.5 mg/kg bolus then infusion 1-4 mg/minute. Lidoderm patch: up to 3 patches per 12 hours
Inhaled (Flovent HFA) 88 mcg BID; intranasal (Flonase) 2 sprays/nostril daily; topical (Cutivate) 0.05% cream BID
Initial genital herpes 1 g PO BID × 10 days; recurrent 500 mg BID × 3 days; suppression 500 mg-1 g PO daily; zoster 1 g TID × 7 days
Initial genital herpes 400 mg PO TID × 7-10 days; episodic 800 mg TID × 2 days; suppression 400 mg BID; herpes zoster 800 mg 5×/day × 7 days; HSV encephalitis 10 mg/kg IV q8h × 14-21 days
Insomnia (off-label): 25-50 mg PO at bedtime, titrate to effect. Depression: 150 mg/day divided BID-TID; titrate to 400 mg/day outpatient or 600 mg/day inpatient
Intranasal 0.1% or 0.15%: 1-2 sprays/nostril BID; ophthalmic 0.05%: 1 drop in each eye BID
Intranasal Nasonex 2 sprays/nostril daily (50 mcg/spray); inhaled Asmanex 220 mcg DPI 1-2 inhalations daily/BID; topical Elocon 0.1% cream daily
Intuniv ER 1 mg PO once daily; titrate by 1 mg/week as tolerated to clinical response
Isosorbide mononitrate ER: 30-60 mg PO once daily in the morning, titrate to 120-240 mg/d; isosorbide dinitrate IR: 5-20 mg PO TID with a 12-14 hour nitrate-free interval to prevent tolerance
MDD/GAD: 20 mg PO once daily. Panic disorder: 10 mg titrating to 40 mg. OCD: 20 mg titrating to 40-60 mg. CR: 25 mg/day. Brisdelle: 7.5 mg at bedtime for hot flashes
MDI 90 mcg/puff, 2 puffs q4-6h prn; nebulized 2.5 mg in 3 mL saline q4-6h
Maintenance 800-2,000 IU PO daily; deficiency replacement 50,000 IU PO weekly for 8-12 weeks then maintenance, or equivalent daily dosing 5,000-10,000 IU/d
Migraine prophylaxis: 400 mg PO daily; deficiency replacement 5-30 mg/d
Migraine: 240 mg SC loading dose, then 120 mg SC monthly. Cluster: 300 mg SC at onset of cluster period, then monthly during cluster.
Migraine: 25 mg PO at bedtime, titrate by 25 mg weekly to target 100 mg/day divided BID. Seizures: 25-50 mg/day, titrate weekly to 200-400 mg/day divided BID
Modern clinical-trial standard: 25 mg synthesized psilocybin, single oral dose with psychological support
Motion sickness: 25-50 mg PO 1 hour before travel, repeat every 24 hours as needed. Vertigo: 25-100 mg/day divided
NVAF: 20 mg PO once daily with the evening meal (15 mg if CrCl 15-50); acute VTE: 15 mg BID for 21 days, then 20 mg daily; CAD/PAD: 2.5 mg BID with aspirin
NVAF: 5 mg PO BID (2.5 mg BID if 2 of 3: age ≥80, weight ≤60 kg, serum creatinine ≥1.5 mg/dL); acute VTE: 10 mg BID for 7 days, then 5 mg BID
Narcolepsy: 75 mg PO once daily upon awakening, titrate every 3 days. OSA: 37.5 mg PO once daily, titrate.
Nebulized 500 mcg q6-8h (or with albuterol as DuoNeb); MDI 17 mcg/puff, 2 puffs QID; nasal 0.03% or 0.06% spray BID-TID
Neuropathic pain: 75 mg PO BID, titrate to 150 mg BID after 1 week. Fibromyalgia: 75 mg PO BID, titrate to 150 mg BID. Anxiety (off-label): 75-150 mg/day divided BID-TID
Niaspan ER 500 mg PO at bedtime, titrate weekly to 1-2 g/d; flushing-protective aspirin 30-60 minutes before dose; pellagra replacement 100-500 mg/d
No current medical indication. Historical anesthetic dose 0.25 mg/kg IV (Sernyl).
No medical dose. Active recreational doses reported in the 0.5–1.5 mg range (similar potency to alprazolam).
OTC dentifrice/rinse 0.05-0.5% fluoride daily; Rx 1.1% sodium fluoride toothpaste/gel daily; supplements (where local water non-fluoridated) age-titrated 0.25-1 mg/d
OTC: 220 mg PO every 8-12 hours, max 660 mg/24h. Rx: 250-500 mg PO BID. Acute gout: 750 mg loading then 250 mg every 8 hours
One cup (~40–60 mg caffeine; about half of brewed coffee)
One cup (~80–145 mg caffeine for brewed; 60–100 mg for instant)
Ophthalmic 1 drop in affected eye(s) TID; topical Mirvaso 0.33% gel applied to face daily
Ophthalmic 1 drop in each eye every 8-12 hours
Ophthalmic Pataday 0.7%: 1 drop in each eye once daily (24-hour formulation); Patanol 0.1% BID; intranasal Patanase 2 sprays/nostril BID
Ophthalmic: 1 drop 0.5% in affected eye(s) BID (or once daily for XE / Istalol). Oral hypertension: 10 mg PO BID, titrate to 60 mg/day. Migraine prophylaxis: 10 mg BID, titrate to 30 mg/day
Oral 0.25 mcg daily, titrate by serum calcium and PTH; IV in CKD 0.5-3 mcg three times weekly
Oral 1-2 mg daily; transdermal patch 0.025-0.05 mg/d twice weekly; transdermal gel 0.5-1 g/d; vaginal 10 mcg tablet twice weekly for GSM. Always combine with a progestogen in patients with an intact uterus.
Oral 200-400 mg BID; ophthalmic 1-2 drops in affected eye(s) q2-4h initially, then taper; otic 5-10 drops in affected ear BID
Oral 300-450 mg PO QID; IV 600-900 mg q8h; topical 1% solution/gel BID; vaginal 100 mg ovule × 3 days or 2% cream × 7 days
Oral load 800-1600 mg/d in divided doses for 1-3 weeks, then 600-800 mg/d for 1 month, then 200-400 mg/d maintenance; IV 150 mg over 10 min then 1 mg/min for 6 hours then 0.5 mg/min
Oral: 100 mg PO BID, titrate to 400 mg BID. IV: 20 mg over 2 minutes, repeat 40-80 mg every 10 minutes as needed (maximum cumulative 300 mg); continuous infusion 2 mg/minute
Oral: 1000-1500 mg elemental calcium/day in divided doses for supplementation; IV gluconate 1 g (4.65 mEq) over 5-10 min for hyperkalemia or symptomatic hypocalcemia
Oral: 1500 mg PO QID for 2-3 days (load), then 750-1500 mg QID maintenance. IV/IM: 1000 mg every 8 hours for acute spasm
Oral: 250 mg PO once daily × 6 weeks (fingernails) or 12 weeks (toenails); topical: cream BID × 1-2 weeks
Oral: 4-6 mL (400,000-600,000 units) suspension QID swish-and-swallow; topical: BID-QID; vaginal tablet 1 daily for 2 weeks
Oral: 5 mg PO TID, titrate by 5 mg per dose every 3 days. Intrathecal: bolus test dose, then continuous infusion via implanted pump
Oral: 50-100 mg at migraine onset, may repeat in 2 hours if needed. SC: 6 mg, may repeat in 1 hour. Nasal: 5-20 mg per nostril, may repeat in 2 hours
Osteoarthritis: 200 mg PO once daily or 100 mg BID. Rheumatoid arthritis: 100-200 mg PO BID. Acute pain: 400 mg loading, then 200 mg every 12 hours
Ozempic: 0.25 mg SC weekly × 4 wk'"`UNIQ--ref-00000245-QINU`"' · Wegovy: 0.25 mg SC weekly × 4 wk'"`UNIQ--ref-00000246-QINU`"' · Rybelsus: 3 mg PO daily × 30 d'"`UNIQ--ref-00000247-QINU`"'
PO 10 mg QID; IV 5-10 mg every 20-30 minutes for hypertensive emergency
PO Medrol Dosepak (5-day taper from 24 mg to 4 mg) is the prototypic short-course outpatient regimen; IV pulse 1 g daily for 3-5 days for MS relapse; intra-articular 4-80 mg per joint q1-5 weeks
POP: 0.35 mg PO daily continuously (no placebo week); high-dose 5 mg Aygestin for amenorrhea/endometriosis 5-10 mg/d
Parkinson disease: 0.125 mg PO TID, titrate weekly to maintenance ~1.5 mg TID. Restless legs syndrome: 0.125 mg PO 2-3 hours before bedtime, titrate to 0.5 mg/day if needed
Parkinson disease: 0.25 mg PO TID, titrate weekly. Restless legs syndrome: 0.25 mg PO 1-3 hours before bedtime, titrate to 4 mg/day if needed
Pediatric 1-2 mg/kg/d (max 60 mg) PO for asthma exacerbation; adult dosing similar to prednisone milligram-for-milligram (~1:1 potency)
Pediatric 6-11: 100 mg PO daily, titrate weekly to max 400 mg. Adolescent 12-17: 200 mg, max 400 mg. Adult: 200 mg, max 600 mg.
Physiologic replacement 15-25 mg/d divided (e.g., 10 mg AM, 5 mg noon, 5 mg afternoon); stress dose 50-100 mg IV q6-8h; adrenal crisis 100 mg IV then 50-100 mg q6h; topical 0.5-2.5% applied 2-4×/d
Replacement oxide 400-800 mg/d in divided doses (high diarrhea rate); citrate 200-400 mg/d (better tolerated, better absorbed); IV sulfate 1-2 g over 5-60 minutes for hypomagnesemia or torsades; eclampsia 4-6 g IV loading then 1-2 g/h
Replacement: 1000 mcg IM daily for 1 week, then weekly for 4 weeks, then monthly; or 1000-2000 mcg PO daily (effective even in pernicious anemia via passive diffusion); intranasal 500 mcg weekly
Replacement: 15-30 mg (22.5-45 IU) daily; NASH: 800 IU daily; AREDS-2: 400 IU daily (in combination formula)
Rheumatologic: 7.5-15 mg PO or SC '''once weekly''' (not daily — daily dosing is a recognized fatal error); folic acid 1 mg PO daily on non-MTX days; oncology dosing is far higher and indication-specific
SC 4-6 units (or 1 unit per 10-15 g carbs) at meals; titrate to postprandial glucose
SC 4-6 units (or 1 unit per 10-15 g carbs) at meals; titrate to postprandial glucose. Typical total daily dose 0.5-1 U/kg/d split between basal and prandial coverage in T1DM
SL 0.3-0.6 mg every 5 minutes up to 3 doses for acute angina (call EMS if not resolved after the third); IV infusion 5-10 mcg/min titrated; transdermal patch 0.2-0.4 mg/hr for 12-14 hours daily (nitrate-free interval prevents tolerance)
SR 150 mg PO once daily for 3 days, then 150 mg BID. XL 150 mg PO once daily for 4 days, then 300 mg once daily. Zyban (smoking cessation) 150 mg daily for 3 days, then 150 mg BID
Schizophrenia / acute mania: 5-10 mg PO once daily, target 10-15 mg/day. Acute agitation IM: 10 mg, may repeat in 2 hours. Relprevv LAI: 150-300 mg every 4 weeks after oral overlap
Schizophrenia / mania: 1 mg PO BID, titrate to 4-8 mg/day. Pediatric autism irritability: 0.25-0.5 mg/day, weight-titrated. Consta LAI: 25 mg IM every 2 weeks after oral overlap
Schizophrenia/bipolar mania: 10-15 mg PO once daily, target 15-30 mg. MDD adjunct: 2-5 mg/day, target 5-15 mg. Pediatric autism irritability: 2 mg, titrate to 5-15 mg. Maintena LAI: 400 mg IM every 4 weeks after oral overlap
Schizophrenia: 1 mg PO daily × 4 days, then 2 mg daily × 3 days, then 4 mg daily. MDD adjunct: 0.5-1 mg daily, increase to 2 mg max. AD agitation: 0.5 mg daily, titrate to 2-3 mg daily.
Schizophrenia: 1.5 mg PO daily, increase to 1.5-6 mg as tolerated. Bipolar mania: 1.5 mg, may increase to 3-6 mg. Bipolar depression: 1.5 mg daily for 14 days, then 3 mg. MDD adjunct: 1.5 mg, may increase to 3 mg.
Seizures: 10-15 mg/kg/d divided BID-TID, titrate to therapeutic level (50-100 mcg/mL); bipolar mania: 750 mg/d divided, titrate
Seizures: 100-125 mg PO at bedtime x 3 days, then BID, then TID, escalating to 750-1500 mg/day. Essential tremor: 25-50 mg PO at bedtime, titrate slowly to 250-750 mg/day
Seizures: 200 mg PO BID, titrate by 200 mg/week to 800-1200 mg/day. Trigeminal neuralgia: 100-200 mg BID, titrate to 200-400 mg TID. Bipolar: 200 mg BID, titrate to 1600 mg/day
Single 60-hour continuous IV infusion: 30 mcg/kg/h × 4h → 60 mcg/kg/h × 20h → 90 mcg/kg/h × 28h → 60 mcg/kg/h × 4h → 30 mcg/kg/h × 4h
Strongyloides 200 mcg/kg PO single dose; scabies 200 mcg/kg PO repeated at 7-14 days; onchocerciasis 150 mcg/kg q6-12 months
Surgical scrub 4% CHG; preop skin prep 2% CHG/70% isopropyl alcohol (ChloraPrep); ICU bathing 2% CHG daily; oral rinse 0.12% 15 mL twice daily for 30 seconds
Topical 0.025-0.5% cream/ointment BID; intra-articular 5-40 mg per joint q3-6 months; intranasal Nasacort 110 mcg/spray, 2 sprays/nostril daily; oral paste 0.1% to lesion 2-3×/d
Topical 2% shampoo twice weekly for seborrheic dermatitis or tinea versicolor; oral use restricted by 2013 FDA action to indications where alternatives have failed
Topical cream/lotion BID; shampoo twice weekly; nail lacquer (Penlac) once daily for up to 48 weeks
Topical: 0.5-5% cream/solution to lesions BID × 2-4 weeks; systemic IV: regimen-specific in cancer chemotherapy
Topical: 1% cream BID × 2-4 weeks; vaginal: 1% or 2% cream nightly × 7 days, or 100/200/500 mg vaginal tablet single or 3-day regimens; troche: 10 mg PO five times daily × 2 weeks for thrush
Topical: apply small amount to affected area TID × 5-10 days; nasal: apply half the contents of a single-use tube into each nostril BID × 5 days
Topical: pea-sized amount to dry face at bedtime, building from 2-3×/week to nightly as tolerated; oral APL: 45 mg/m²/d in divided doses
Transplant: 5-10 mg/kg/d divided BID, titrated to trough levels (typically 100-300 ng/mL depending on regimen and post-transplant interval); ophthalmic Restasis 0.05% one drop BID
Treatment 70 mg PO once weekly (or 10 mg daily); prevention 35 mg weekly (or 5 mg daily); always taken first thing in the morning with a full glass of water, remaining upright for 30 minutes
Treatment: 75 mg PO BID × 5 days (adult); pediatric weight-based; prophylaxis: 75 mg PO once daily × 7-10 days
Trials use 25 mg or 50 mg PO daily
Typical 5 mg PO daily; 2.5 mg in elderly, low body weight, malnutrition, hepatic dysfunction. Genotype-guided initial dosing per CPIC/IWPC algorithms (CYP2C9, VKORC1, CYP4F2) is one of the most-established PGx applications in current practice
Varies by salt form and brand; e.g., Tricor 145 mg PO daily; reduce to 48 mg in renal impairment
Victoza: 0.6 mg SC daily × 1 wk'"`UNIQ--ref-00000181-QINU`"' · Saxenda: 0.6 mg SC daily × 1 wk'"`UNIQ--ref-00000182-QINU`"'
Volume and concentration titrated to clinical status; symptomatic hyponatremia: 3% NaCl 100-150 mL bolus, reassess
Volume titrated to clinical status; typical adult bolus 500-1000 mL, then reassess
Vulvovaginal: 150 mg PO single dose; oropharyngeal: 200 mg PO day 1, then 100 mg daily ×14 days; invasive candidiasis: 800 mg load, then 400 mg PO/IV daily; cryptococcal meningitis: 400-800 mg/d
Was 1 mg/kg IV q4w × 2, then 3 mg/kg × 2, then 6 mg/kg × 2, then 10 mg/kg q4w
Week 1: 1 tablet (8/90 mg) PO morning; week 2: 1 tablet AM + 1 PM; week 3: 2 AM + 1 PM; week 4 onward: 2 AM + 2 PM (32 mg naltrexone / 360 mg bupropion/d)
Week 1: 8.9 mg PO once daily in the morning. Week 2: 17.8 mg. Week 3+: 35.6 mg (max). Titrate as needed.
XR 37.5 mg PO once daily for 4-7 days, then 75 mg/day; titrate by 75 mg every ≥4 days to clinical effect. IR 25-37.5 mg BID-TID
~10 units SC at the same time daily, or 0.1-0.2 units/kg/d; titrate by fasting glucose. Frequently dosed BID at moderate-to-high doses
Search
preparations:
30, 60, 180 mg tablets; 30 mg ODT; 6 mg/mL oral suspension; all OTC (1)
fda max:
180 mg/d (adults) (1)
routes:
Oral (1)
onset:
(Click arrow to add another value)
None
·
Hours
·
30-60 minutes
· 1-2 hours ·
~30 min
·
LDL lowering at 2 weeks, max by 4 weeks
·
~1 hour
·
15-30 minutes
·
15–30 min
·
1–2 h
·
30–60 min
·
Antidepressant effect emerges over 1-2 weeks
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BP and symptomatic LUTS improvement within 1-2 weeks
·
BP effect within 1-2 weeks
·
Clinical improvement within 24-72 hours
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Days
·
Motor improvement over days at therapeutic dose
·
Over weeks
·
Postprandial glucose effect within days; HbA1c by 12 weeks
·
Sleep effect from first dose; antidepressant effect over 1-4 weeks
Other values:
'''Anxiolytic effect emerges over 2-4 weeks'''; buspirone does NOT work for acute anxiety, which is the central teaching point and the most common cause of treatment failure
1 hour PO; minutes IV
1-2 hours (oral)
1-2 hours (slower than immediate-release amphetamine because activation requires enzymatic cleavage in red blood cells)
1-2 hours PO
1-2 hours for migraine relief
1-2 weeks for antidepressant effect; smoking-cessation effect builds over the first 1-2 weeks
1-2 weeks for neuropathic pain and anxiolytic effect; anticonvulsant effect at therapeutic plasma level
1-3 days
1-3 hours (slower onset than cetirizine; symptom relief somewhat less)
10 minutes (SC); 15-30 minutes (nasal); 30-60 minutes (oral)
10-30 minutes
10-30 minutes (IR)
15 minutes
15-20 minutes
15-30 minutes (oral)
15-30 minutes (oral); 1-2 minutes (IV)
15-60 minutes (oral); 1-5 minutes (IV); 4-10 minutes (rectal or intranasal)
15–30 min (fasting)
1–2 h (PO), immediate (IV)
1–2 h (PO); immediate (IV)
1–2 weeks for muscle effects; preventive migraine benefit accrues over 12-week cycles
2-3 hours per dose; full acid suppression after 3-5 days
20 minutes (oral); 5 minutes (IV)
20-45 min subjective onset; psilocin formation from psilocybin requires intestinal and hepatic alkaline phosphatase
20-60 minutes
20–60 min (oral)
30 min
30 minutes
30 minutes (IM); 30-60 minutes (oral)
30 minutes PO; minutes IV
30 minutes for migraine relief
30-60 min (IR oral); 2-3 days to steady state (transdermal patch)
30-60 min (immediate-release); 1-2 h (extended-release)
30-60 min (sedation); days to weeks (neuroleptic effect)
30-60 minutes (IR)
30-60 minutes (PO)
30-60 minutes (immediate-release oral)
30-60 minutes (oral)
30-60 minutes (oral); 5 minutes (IV); 15-30 minutes (IM)
30-60 minutes (oral); rapid relief in acute gout
30-60 minutes (oral); slower for topical
30–60 min (PO)
30–60 min (SL)
30–60 minutes
30–90 min
4-6 weeks for full antidepressant effect (claimed earlier onset for some patients due to 5HT1A partial agonism)
45-75 min (oral)
5-10 minutes (IV); 30 minutes (oral IR); slower for ER and rectal
<1 minute (IV); 1-2 minutes (infiltration); 30+ minutes (patch on adult skin, faster on thinner pediatric skin)
ADHD effect emerges over 1-2 weeks (slower than psychostimulants); full effect 4-6 weeks
ADHD symptom improvement reported within 1-2 weeks (faster than atomoxetine which takes 4-6 weeks)
AF conversion within hours of single PO dose
Acid suppression within hours; full effect after 3-5 days of dosing
Acute: minutes (IV); chronic: bone effect over months
Amyloid PET clearance within months; cognitive benefit over 18 months
Analgesia within 30 minutes; full anti-inflammatory effect over days
Analgesia within hours; anti-inflammatory effect over days
Analgesic effect within hours; full anti-inflammatory effect over 1-2 weeks
Anti-inflammatory effect within 24 hours of gout flare onset; loses effectiveness if delayed
Anticoagulant effect at 24-72 hours; full INR effect 5-7 days
Anticonvulsant effect emerges with slow titration over weeks; tremor effect over weeks
Anticonvulsant effect within days at therapeutic level; migraine prophylaxis effect emerges over 2-3 months
Anticonvulsant effect within days at therapeutic plasma level
Anticonvulsant effect within days at therapeutic plasma level; rapid titration possible
Anticonvulsant effect within days; mood-stabilizing effect 1-3 weeks
Anticonvulsant effect within days; trigeminal neuralgia relief 24-72 hours; mood-stabilizing effect over weeks
Antidepressant effect emerges over 1-2 weeks; full clinical effect 4-6 weeks
Antidepressant effect over 1-2 weeks; anxiolytic effect over 4-6 weeks
Antidepressant effect over 1-2 weeks; full clinical effect 4-6 weeks
Antidepressant effect within hours of infusion start; sustained at 30 days
Antiepileptic effect within days at therapeutic level; mood-stabilizing effect emerges over weeks
Antihypertensive effect within 1 week; heart-failure mortality benefit accrues over months of titration
Antiplatelet effect within 2 hours of a loading dose; steady-state at 5-7 days of maintenance dosing
Antiplatelet effect within 30 minutes of loading dose (faster than clopidogrel)
Antiplatelet effect within 30-60 minutes; analgesic effect 30-60 minutes
Antipsychotic effect over weeks
Anxiolysis classically 3-4 weeks, continuing improvement to 8-12 weeks
Appetite suppression within hours; weight loss over weeks-months
BP effect 1 hour; max at 4-6 hours
BP effect 1-2 hours; max at 6 hours
BP effect 1-2 weeks; antihypertensive peak 3-6 weeks
BP effect 1-2 weeks; max at 2-3 weeks
BP effect 2 hours; max at 4-6 weeks
BP effect within 24 hours; full effect at 1-2 weeks (long half-life)
BP effect within hours (oral); 5-10 minutes (IV)
BP effect within hours (oral); IOP reduction within 30 minutes, full effect 1-2 weeks (ophthalmic)
BP effect within hours; full effect over 1-2 weeks
BP lowering within 1 hour; max at 6 hours
BP lowering within 1 hour; max effect at 6 hours
BPH symptom improvement at 3-6 months; prostate volume reduction over 6-12 months; hair regrowth at 6-12 months
Benefit over weeks of dosing
Biochemical improvement within 2-4 weeks; full euthyroid state 6-12 weeks
Bone marker reduction within weeks; BMD improvement at 1-3 years; fracture-risk reduction documented at 3-5 years
Bowel movement within 1 week; abdominal pain improvement over weeks
Bronchodilation 15-30 minutes
Bronchodilation 30 minutes; steady-state at 1-2 weeks
Bronchodilation within 1-2 hours; full controller effect 1-2 weeks
Caries reduction over months to years of consistent use
Clinical and mycologic cure follows the full course; nail clearance over months of regrowth
Cognitive effect emerges gradually over weeks to months; ceiling effect at the therapeutic dose
Cognitive effect emerges gradually over weeks to months; symptomatic effect only
Component effects accumulate over weeks
Constipation: 1-3 days; bowel prep: 1-3 hours after starting
Constipation: 24-48 hours; HE: ammonia reduction within hours of stool production
Contraception within 48 hours of starting (POP); endometrial effects days
Contraceptive within 24 hours if given in first 5 days of cycle; otherwise backup for 7 days
Day 3 of dosing in trials; sustained through day 45
Days for calcium effect; weeks for PTH suppression
Days for dermatophyte clearance; nail clearance over months
Days for immunosuppressive effect
Days for symptom improvement in scurvy
Days to weeks for tissue saturation
Days to weeks to raise 25(OH)D; clinical effect on bone over months
Diuresis at 2 hours; antihypertensive effect within days, max at 3-4 weeks
Diuresis at 2-3 hours; BP effect over weeks
Effect demonstrated within 24 hours in some patients
Effects accumulate over weeks; assess at 8 weeks
Estrogen suppression within days; clinical effect over months
First bowel movement within 1-2 hours
Glucose lowering within days; HbA1c effect at 8-12 weeks
Glycemic effect within days; full weight effect over months'"`UNIQ--ref-00000301-QINU`"'
Glycemic effect within days; near-maximal HbA1c effect by 4 weeks at any given dose'"`UNIQ--ref-00000057-QINU`"'
Glycemic effect within days; weight effect over weeks to months'"`UNIQ--ref-00000188-QINU`"'
Glycemic effect within days;<sup class="pcp-cn" title="This claim needs a citation.">[[[Pharmacopedia:Citation needed|citation needed]]]</sup> full weight effect over months'"`UNIQ--ref-00000250-QINU`"'
Glycemic effect within hours (Byetta); weeks (Bydureon, extended-release microsphere)'"`UNIQ--ref-000000EA-QINU`"'
Glycosuria within hours; HbA1c effect at 12 weeks; CV/renal benefits over months
Glycosuria within hours; HbA1c effect at 12 weeks; cardiovascular and renal benefits over months
Gradual; full clinical effect over 2-4 weeks of titration
HbA1c effect at 12-16 weeks (slower than other classes)
Headache relief at 30-60 minutes
Hematologic response within days
Hours (PO); IV faster but rate-limited
Hours (faster than T4); peak biologic activity 24-48 hours
Hours (systemic); minutes (ophthalmic)
Hours (transdermal); days (IM esters)
Hours to days
Hours to days for inflammation; substantial improvement within 1 week
IM: 5-10 minutes; IV: seconds; nebulized: 5-10 minutes
IOP lowering at 1 hour; max at 2-3 hours
IOP lowering at 2 hours; max at 4 hours
IOP lowering at 3-4 hours; maximum at 8-12 hours
IOP lowering at 4 hours, maximum at 8-12 hours; eyelash effect after 2 months
IR 20 minutes; ER ~6 hours
IR: 30–60 min; XR: 1–2 h to peak effect
IV pulse: hours; PO: hours; intra-articular: days
IV/IM 1-3 minutes; PO 30-60 minutes
IV: 1-3 minutes (SVT termination); PO IR: 30-60 minutes; ER: hours
IV: 3-7 minutes (rate control); PO IR: 30-60 minutes; ER: hours
IV: 5 minutes; PO: 30-60 minutes
IV: 5-20 minutes; PO: 30-60 minutes
IV: minutes; IM benzathine: depot levels last weeks
IV: minutes; oral: weeks to load
Immediate (IV)
Immediate (IV); within minutes (oral antacid)
Immediate intravascular expansion
Inhaled: 5-15 minutes; PO: 30 minutes
Inhaled: bronchial effect 1-2 weeks; nasal: symptom relief 12-24 hours; topical: hours
Inhaled: bronchial effect 1-2 weeks; oral GI effect 1-2 weeks
Intranasal: symptom relief 12-24 hours; inhaled: bronchial effect 1-2 weeks
LDL lowering at 1 week, max by 4 weeks
LDL lowering at 2 weeks, max by 4 weeks; cardiovascular benefit months to years
LDL lowering within 2 weeks
LDL reduction ~50-60% from baseline at 1-2 weeks
Lipid changes 4-8 weeks
Migraine effect after 1-3 months of daily use
Minutes
Modest appetite suppression within weeks; weight loss over months
Mood improvement at 1-3 weeks; full effect 4-6 weeks
Mood: 2–4 weeks. Pain: often within 1–2 weeks.
Mucosal protection within hours; ulcer healing over 2-4 weeks
Natriuresis at 2-3 days; endocrine effects (gynecomastia, antiandrogen action) over weeks
Neuroleptic effect emerges over days to weeks
Neuroleptic effect emerges over days to weeks; activation symptoms (akathisia, insomnia) often within days
Neuropathic pain and fibromyalgia effect emerges over 1-2 weeks
OCD effect over 1-2 weeks initial, with full effect typically 6-12 weeks; among the slowest SSRIs for OCD response
Onset of preventive effect over weeks; some patients respond after first dose
Oral: hours; IV: minutes
PBA episode reduction within 1-2 weeks
PET Aβ reduction over months
PO 1 hour; IV 10 minutes
PO 1–2 h; IM 30–60 min; IV 5–20 min
PO 30-60 minutes; IV minutes
PO 6-12 hours; PR 15-60 minutes
PO: 30-60 minutes; IV: minutes
Pain and migraine prophylaxis effect 1-4 weeks; antidepressant effect 4-6 weeks
Pain relief reported within 15 min in trials
Peak anticoagulant effect 2-4 hours
Peak anticoagulant effect 3-4 hours
Peak plasma at 1-2 hours; clinical effect within 24-72 hours
Prostate volume reduction over 6-12 months
Rapid (within 1 week in trials)
Reticulocyte response at 3-5 days; neurologic recovery weeks to months (and may be incomplete if longstanding)
Reticulocyte response at 7-10 days; hemoglobin rise of ~1 g/dL per 3 weeks
Rheumatologic effect at 4-8 weeks; ectopic resolution over 2-3 weeks
Rheumatologic effect at 6-12 weeks
SC: 5-15 minutes (Fiasp 2.5 minutes earlier on average)
SC: 5-15 minutes; ultra-rapid Lyumjev faster
SL/spray: 1-3 minutes; IV: minutes; patch: 30-60 minutes
SL: 2-5 minutes; PO mononitrate: 30-60 minutes
Seconds
Sedation from first dose; neuroleptic effect emerges over days to weeks
Sedation/dizziness within hours of oral dose; endometrial effects over days
Serum urate falls gradually over days to weeks; acute flare prevention requires colchicine cover during initiation
Significant antidepressant response by week 1 in trials (faster than monoaminergic antidepressants which take 4-6 weeks)
Sleep effect from first dose; analgesic and migraine-prophylaxis effect 1-4 weeks; antidepressant effect 4-6 weeks
Sleep effect within 30-60 minutes; antidepressant effect over 1-2 weeks
Slow, 2–6 h
Slowing of cognitive decline over 18 months (modest effect, ~27% relative slowing)
Smoked 2-5 min; insufflated 5-15 min; oral 30-60 min; IV / IM ~5-15 min
Symptom improvement within 1 week; peak effect at 4-6 weeks
Symptom improvement within 1-2 weeks
Symptom improvement within weeks
Symptom relief 1-4 days; full acid suppression after 3-5 days of dosing
Symptom relief within 24-48 hours
Symptom relief within 24-48 hours of starting episodic treatment
Symptom relief within 30 minutes
Symptom relief within 30-60 minutes
Symptom relief within days
Symptom shortening detectable within 24-48 hours of starting (small absolute benefit; ~1 day reduction in symptom duration)
Symptomatic effect within weeks; full response by 12-24 weeks
Symptomatic improvement 2-4 weeks
TSH normalization 4-8 weeks
TSH normalization 4-8 weeks; symptomatic improvement weeks to months
Topical hours; intra-articular days to weeks
Topical hours; oral days
Topical: inflammation, erythema, crusting at 2 weeks; complete response weeks to months after course
Topical: irritation within days; acne improvement 6-12 weeks; oral APL response within days
Triglyceride lowering at 2-4 weeks; max at 8 weeks
Triglyceride lowering at 4-8 weeks
Triglyceride lowering at 4-8 weeks; CV benefit emerges over months
Typical antidepressant 4-6 week onset
Urinary concentration adequate within hours
Vasomotor relief 2-4 weeks; bone density gains over months
Visible lightening at 4-12 weeks
Wake-promoting effect over weeks of titration
Weeks for psychosis/depression; AD agitation benefit emerges over weeks
Weeks for psychosis/mood efficacy
Weeks to raise 25(OH)D into reference range
Within 30 minutes (IR)
Within hours of first administration
Within minutes
~15 min (fastest of the PDE5 inhibitors)
~15–30 min
~20–40 min PO; faster sublingual/intranasal.
~30 minutes (oral)
~30-60 min
Search
duration:
12-24 hours (1)
halflife:
(Click arrow to add another value)
None
·
~12 hours
·
~27 days
·
~5 h (caffeine)
·
'''Autoinduction''': 25-65 hours initially, falling to 12-17 hours after 2-3 weeks of dosing as carbamazepine induces its own CYP3A4 metabolism. Major clinical implication: doses require re-titration after the autoinduction period'"`UNIQ--ref-0000001D-QINU`"'
·
0.5-1.5 hours (plasma); pharmacodynamic effect persists 24+ hours'"`UNIQ--ref-000000DE-QINU`"'
·
1-1.3 hours'"`UNIQ--ref-000001A1-QINU`"'
·
1-1.5 hours'"`UNIQ--ref-00000DE3-QINU`"'
·
1-2 hours (parent compound)'"`UNIQ--ref-00000029-QINU`"'
·
1-2 hours (parent); 18-30 hours for active metabolite oxypurinol'"`UNIQ--ref-0000030F-QINU`"'
·
1-2 hours'"`UNIQ--ref-00000017-QINU`"'
·
1-3 hours (normal liver); markedly prolonged in overdose with glutathione depletion'"`UNIQ--ref-000006A5-QINU`"'
·
1-3 minutes (very short)'"`UNIQ--ref-00000C0F-QINU`"'
·
1.4 hours (parent); 13-24 hours for active metabolite canrenone'"`UNIQ--ref-00000354-QINU`"'
·
1.5-2 hours (longer in renal failure)'"`UNIQ--ref-00000222-QINU`"'
·
1.5-2 hours'"`UNIQ--ref-00000020-QINU`"'
·
10-11 hours (benazeprilat, the active metabolite)'"`UNIQ--ref-00000A22-QINU`"'
·
11-13 h (immediate-release); 11-16 h (extended-release)
·
11-15 hours'"`UNIQ--ref-00000842-QINU`"'
·
12-15 hours (intermediate); '''no active metabolites''' (key clinical feature)'"`UNIQ--ref-00000023-QINU`"'
Other values:
12-15 hours'"`UNIQ--ref-00000022-QINU`"'
12-16 hours'"`UNIQ--ref-00000026-QINU`"'
12-17 hours'"`UNIQ--ref-00000029-QINU`"'
14 hours (parent); 20-30 hours including active ortho- and para-hydroxylated metabolites'"`UNIQ--ref-0000001B-QINU`"'
14-25 hours (longer in elderly and hepatic impairment)'"`UNIQ--ref-00000026-QINU`"'
14–26 h (oral); ~3 weeks (decanoate)
15-20 hours'"`UNIQ--ref-00000020-QINU`"'
16-22 hours'"`UNIQ--ref-0000047D-QINU`"'
18 hours (IR); 32-33 hours (ER)'"`UNIQ--ref-0000001A-QINU`"'
18-44 hours'"`UNIQ--ref-00000020-QINU`"'
1–4 days (7–15 days for norfluoxetine)
2 hours (parent); 6-9 hours for active carboxylic acid metabolite EXP3174'"`UNIQ--ref-000000BC-QINU`"'
2 hours'"`UNIQ--ref-00000015-QINU`"'
2-3 hours (normal renal function); markedly prolonged in renal impairment'"`UNIQ--ref-000010B3-QINU`"'
2-3 hours (parent and active N-desethyl metabolite)'"`UNIQ--ref-000006E1-QINU`"'
2-3 hours'"`UNIQ--ref-00000012-QINU`"'
2-4 hours'"`UNIQ--ref-00000026-QINU`"'
2-5 hours (IR); ER formulations extend functional duration via osmotic/matrix release'"`UNIQ--ref-0000074D-QINU`"'
2-5 hours'"`UNIQ--ref-000002D9-QINU`"'
2.2 h (IR parent); ~3 h (XR parent)
2.5 hours (short, requires TID-QID dosing)'"`UNIQ--ref-0000001D-QINU`"'
2.5-3.5 hours; longer in renal impairment'"`UNIQ--ref-0000025B-QINU`"'
2.5–3 hours
2.7-5.5 hours'"`UNIQ--ref-0000015E-QINU`"'
20-40 hours'"`UNIQ--ref-00000023-QINU`"'
21-54 hours'"`UNIQ--ref-00000026-QINU`"'
24–42 h (buprenorphine); 1–2 h (naloxone)
27-32 hours'"`UNIQ--ref-00000026-QINU`"'
2–3 h
2–3 h (parent compound)
3-10 hours (low dose); 8-15 hours (high dose); much longer in third-space accumulation (pleural effusion, ascites)'"`UNIQ--ref-000007C8-QINU`"'
3-4 hours (similar between PO and IV due to high oral bioavailability)'"`UNIQ--ref-00000B46-QINU`"'
3-4 hours'"`UNIQ--ref-00000026-QINU`"'
3-4.5 hours (IR); 5-7 hours (ER; effective duration 24 hours via formulation)'"`UNIQ--ref-00000642-QINU`"'
3-5 hours (IR); 4.5 hours (ER)'"`UNIQ--ref-0000001D-QINU`"'
3-6 hours (longer in hepatic impairment)'"`UNIQ--ref-00000378-QINU`"'
3-7 hours (IR); functional 24 hours (ER)'"`UNIQ--ref-00000A6B-QINU`"'
3-7 hours (slow acetylators) vs 1-3 hours (rapid acetylators) via NAT2 polymorphism'"`UNIQ--ref-00000687-QINU`"'
30-40 hours (long; accumulates with chronic dosing)'"`UNIQ--ref-00000026-QINU`"'
30-50 hours'"`UNIQ--ref-00000078-QINU`"'
30-50 minutes (short)'"`UNIQ--ref-00000021-QINU`"'
30–60 min
36-42 hours (R/S enantiomers differ; S-warfarin is 2-5× more potent and cleared by CYP2C9)'"`UNIQ--ref-00000705-QINU`"'
3–5 hours
3–6 h
3–7 h
4 hours'"`UNIQ--ref-00000938-QINU`"'
4-5 hours'"`UNIQ--ref-00000026-QINU`"'
4-6 hours (inhaled and PO)'"`UNIQ--ref-00000099-QINU`"'
4-8 hours (longer in elderly, 9-13 hours)'"`UNIQ--ref-00000026-QINU`"'
40-60 hours (notable for the thiazide class)'"`UNIQ--ref-00000783-QINU`"'
4–5 h
5-6 hours'"`UNIQ--ref-00000020-QINU`"'
5-6 hours'"`UNIQ--ref-00000EF9-QINU`"'
5-7 hours'"`UNIQ--ref-00000029-QINU`"'
5-9 hours (elderly: 11-13 hours)'"`UNIQ--ref-00000513-QINU`"'
6-15 hours'"`UNIQ--ref-0000013E-QINU`"'
6-8 hours'"`UNIQ--ref-0000001F-QINU`"'
6-8 hours'"`UNIQ--ref-00000BEB-QINU`"'
6-9 hours (substantially longer in renal impairment due to renal elimination)'"`UNIQ--ref-00000020-QINU`"'
6.2 hours (plasma); ~17 hours in erythrocytes'"`UNIQ--ref-00000018-QINU`"'
6.3 hours'"`UNIQ--ref-00000026-QINU`"'
60-100 hours (long)'"`UNIQ--ref-0000001B-QINU`"'
7-10 hours'"`UNIQ--ref-0000001B-QINU`"'
8-10 hours (longer in elderly and renal impairment)'"`UNIQ--ref-00000396-QINU`"'
8-12 hours (longer in elderly and renal impairment)'"`UNIQ--ref-0000001B-QINU`"'
8-16 hours'"`UNIQ--ref-0000001E-QINU`"'
9-15 hours'"`UNIQ--ref-000001BC-QINU`"'
9-16 hours (pH-dependent: acidic urine shortens, alkaline urine substantially extends)'"`UNIQ--ref-0000001B-QINU`"'
9-16 hours'"`UNIQ--ref-0000097C-QINU`"'
9–12 h
9–12 minutes (intravenous)
Amitriptyline 10-50 hours (highly variable); nortriptyline active metabolite 18-44 hours'"`UNIQ--ref-00000026-QINU`"'
Aqueous crystalline ~30 minutes; benzathine effective ~3 weeks via depot release'"`UNIQ--ref-00001419-QINU`"'
Aspirin 15-30 minutes; salicylate metabolite 2-3 hours (concentration-dependent, saturable at high doses)'"`UNIQ--ref-00000027-QINU`"'
Biphasic: ~3-6 hours alpha, ~5-9 hours beta'"`UNIQ--ref-0000001D-QINU`"'
Bupropion ~21 hours; hydroxybupropion (active metabolite) ~20-37 hours'"`UNIQ--ref-00000023-QINU`"'
Buspirone 2-3 hours; 1-PP active metabolite 4-6 hours'"`UNIQ--ref-0000001D-QINU`"'
Butalbital ~35 hours (long; cumulative effects with frequent use); acetaminophen 1-3 hours; caffeine 3-7 hours'"`UNIQ--ref-0000159F-QINU`"'
Butalbital ~35 hours; aspirin (acetyl group) ~15 minutes, salicylate 2-3 hours; caffeine 3-7 hours'"`UNIQ--ref-000015B7-QINU`"'
Cariprazine ~2-4 d; major active metabolites desmethyl-cariprazine (DCAR) ~1-3 weeks → 'oral depot' effect with delayed steady-state and reduced effect of missed doses
Codeine 2.5-3.5 hours; acetaminophen 1-3 hours'"`UNIQ--ref-00001517-QINU`"'
D-amphetamine ~10 h; L-amphetamine ~13 h (adults)
Dextromethorphan substantially prolonged by quinidine's CYP2D6 inhibition (typical extensive metabolizers see ~10× higher AUC); quinidine ~6-8 hours'"`UNIQ--ref-00001583-QINU`"'
Dextromethorphan ~22 h (when CYP2D6 inhibited); bupropion ~21 h
Diazepam 20-50 hours; '''N-desmethyldiazepam (nordazepam) 30-200 hours''' is the major active metabolite and accumulates substantially with chronic dosing'"`UNIQ--ref-00000026-QINU`"'
Estimated ~12–17 h (some sources cite up to ~21 h); active metabolites prolong effect.
Highly variable by formulation; native T is hours
Highly variable, 7-46 hours (mean ~21 h); lipophilic deposition in fat with delayed re-release contributes to wide range'"`UNIQ--ref-00000065-QINU`"'
Mononitrate ~5 hours; dinitrate ~1 hour'"`UNIQ--ref-00001461-QINU`"'
Morphine 2-4 hours; morphine-6-glucuronide active metabolite 2-4 hours (longer with renal impairment)'"`UNIQ--ref-00000020-QINU`"'
N/A (incorporated into hemoglobin and tissue stores)
Naltrexone ~4 hours (6β-naltrexol metabolite ~13 hours); bupropion ~21 hours'"`UNIQ--ref-00001568-QINU`"'
Not absorbed
Not applicable (electrolyte and buffer)
Not applicable (electrolyte solution)
Not applicable (electrolyte)
Not formally established
Not meaningfully described
Not meaningfully described (electrolyte)
Not meaningfully described (electrolyte; renally cleared)
Not meaningfully described (minimal systemic absorption from topical use)'"`UNIQ--ref-00000F45-QINU`"'
Not meaningfully described (negligible systemic absorption from intact skin or oral mucosa)'"`UNIQ--ref-00001398-QINU`"'
Not meaningfully described (negligible systemic absorption — the drug acts locally and is degraded in the GI tract)'"`UNIQ--ref-0000119C-QINU`"'
Not meaningfully described (negligible systemic absorption)
Not meaningfully described (not systemically absorbed)'"`UNIQ--ref-00000D17-QINU`"'
Not meaningfully described (topical local action)'"`UNIQ--ref-00001239-QINU`"'
Not meaningfully described for an electrolyte; distribution between intra- and extracellular compartments is the relevant kinetic
Not meaningfully described for ophthalmic use'"`UNIQ--ref-00001287-QINU`"'
Not meaningfully described for topical use (systemic exposure varies with surface area, occlusion, skin integrity)'"`UNIQ--ref-0000079E-QINU`"'
Not meaningfully described for topical use'"`UNIQ--ref-00000A02-QINU`"'
Not meaningfully described — lactulose is not significantly absorbed
Not meaningfully described — sucralfate is essentially non-absorbed'"`UNIQ--ref-00000DC2-QINU`"'
Not meaningfully described — topical local action with minimal systemic absorption'"`UNIQ--ref-00001218-QINU`"'
Not well characterized
Not well characterized; tissue incorporation over weeks'"`UNIQ--ref-00000051-QINU`"'
Not well characterized'"`UNIQ--ref-00000018-QINU`"'
Olanzapine ~30 hours; fluoxetine 1-4 days (norfluoxetine 7-15 days)'"`UNIQ--ref-0000154D-QINU`"'
Oxcarbazepine 2 hours; '''10-monohydroxy active metabolite (MHD) ~9 hours''' (the agent that produces essentially all of the clinical effect)'"`UNIQ--ref-0000001A-QINU`"'
Oxycodone 3-5 hours; acetaminophen 1-3 hours'"`UNIQ--ref-000014E2-QINU`"'
Oxycodone 3-5 hours; aspirin (acetyl group) 15-20 minutes, salicylate 2-3 hours at therapeutic doses'"`UNIQ--ref-000014FA-QINU`"'
Parent lisdexamfetamine <1 hour; dextroamphetamine 10-12 hours after release'"`UNIQ--ref-00000017-QINU`"'
Plasma 2-3 hours; biologic ~18-36 hours'"`UNIQ--ref-00000867-QINU`"'
Plasma 2-3 hours; biologic ~18-36 hours'"`UNIQ--ref-000008C4-QINU`"'
Plasma 3-4 hours; biologic ~12-36 hours'"`UNIQ--ref-000002A3-QINU`"'
Plasma ~1-2 hours; biologic ~8-12 hours'"`UNIQ--ref-00000AD1-QINU`"'
Plasma ~3 hours; bone half-life ~10 years'"`UNIQ--ref-000006C3-QINU`"'
Plasma ~3-4.5 hours; biologic ~36-72 hours'"`UNIQ--ref-00000E2B-QINU`"'
Plasma ~3-5 hours; biologic effect substantially longer (~12-36 hours for intermediate-acting glucocorticoids)'"`UNIQ--ref-00000666-QINU`"'
Plasma ~5 hours; biologic ~36-54 hours'"`UNIQ--ref-0000101A-QINU`"'
Primidone 5-15 hours; '''phenobarbital active metabolite 50-150 hours'''; PEMA (phenylethylmalonamide) active metabolite 16 hours'"`UNIQ--ref-00000017-QINU`"'
Psilocin: ~2-3 h; psilocybin itself is a prodrug, dephosphorylated within minutes of absorption
Risperidone 3-20 hours; '''9-hydroxy-risperidone (paliperidone) ~20-24 hours''' is the major active metabolite and is separately marketed as a parent compound (Invega)'"`UNIQ--ref-00000021-QINU`"'
Sumatriptan ~2.5 hours; naproxen 12-15 hours'"`UNIQ--ref-000015D1-QINU`"'
T4 ~7 days; T3 ~1 day'"`UNIQ--ref-00000036-QINU`"'
Tissue half-life not formally measured; clinical effect ~12 weeks
Topical: not meaningfully described; oral 2-8 hours'"`UNIQ--ref-00000888-QINU`"'
Tramadol 6-7 hours; M1 active metabolite 7-9 hours'"`UNIQ--ref-0000001D-QINU`"'
Tramadol ~5-7 hours (M1 metabolite ~9 hours); acetaminophen 1-3 hours'"`UNIQ--ref-00001530-QINU`"'
Variable; effect dependent on local intestinal action rather than systemic kinetics'"`UNIQ--ref-0000106B-QINU`"'
Venlafaxine 5 hours; desvenlafaxine active metabolite 11 hours'"`UNIQ--ref-00000026-QINU`"'
~0.5 hours plasma; tissue retention longer
~0.5-2 hours (oral)'"`UNIQ--ref-00000BA3-QINU`"'
~1 day (much shorter than T4's ~7 days)'"`UNIQ--ref-0000149D-QINU`"'
~1 hour (IR niacin); ER formulations extend functional duration'"`UNIQ--ref-00001038-QINU`"'
~1 hour (plasma); pharmacodynamic effect persists 24+ hours'"`UNIQ--ref-0000011D-QINU`"'
~1 hour SC'"`UNIQ--ref-00000589-QINU`"'
~1 hour'"`UNIQ--ref-000004F2-QINU`"'
~1 hour'"`UNIQ--ref-00001050-QINU`"'
~1-2 hours plasma (riboflavin itself); FAD/FMN tissue cofactors are continuous
~1.5 hours (plasma); pharmacodynamic effect 24+ hours via target turnover'"`UNIQ--ref-000008E8-QINU`"'
~1.5 hours'"`UNIQ--ref-00000FF9-QINU`"'
~1.5-2 hours'"`UNIQ--ref-00000D3E-QINU`"'
~1.7 hours'"`UNIQ--ref-000009E4-QINU`"'
~1.8 hours (initial); ~10 hours (terminal)'"`UNIQ--ref-00000B25-QINU`"'
~10 h (CYP2D6 extensive metabolizers); up to 31 h (poor metabolizers)
~10-20 days (steady-state body pool); single dose plasma ~2 hours
~10-20 minutes systemically (rapid hepatic and erythrocyte dihydropyrimidine dehydrogenase clearance)'"`UNIQ--ref-000011BE-QINU`"'
~11 h
~11 hours (enalaprilat, the active metabolite)'"`UNIQ--ref-00000B84-QINU`"'
~11 hours'"`UNIQ--ref-00000015-QINU`"'
~11 hours'"`UNIQ--ref-0000001A-QINU`"'
~11 hours'"`UNIQ--ref-00000029-QINU`"'
~11-17 days'"`UNIQ--ref-0000147F-QINU`"'
~12 hours (effective); terminal half-life is biphasic'"`UNIQ--ref-00000059-QINU`"'
~12 hours (effective); terminal much longer'"`UNIQ--ref-0000117C-QINU`"'
~12 hours apparent (functional duration ~24 hours due to depot release kinetics)'"`UNIQ--ref-0000023B-QINU`"'
~12 hours'"`UNIQ--ref-000001FB-QINU`"'
~12 hours'"`UNIQ--ref-00000D82-QINU`"'
~12 hours'"`UNIQ--ref-0000111F-QINU`"'
~12.1 days
~12.4 hours'"`UNIQ--ref-0000027C-QINU`"'
~12.4 hours'"`UNIQ--ref-00000765-QINU`"'
~12.9 hours'"`UNIQ--ref-00000552-QINU`"'
~13 hours'"`UNIQ--ref-0000018A-QINU`"'
~13 hours'"`UNIQ--ref-0000056C-QINU`"'
~13-17 hours (ramiprilat, the active metabolite)'"`UNIQ--ref-00000C32-QINU`"'
~13-20 hours (oral); transdermal pharmacokinetics buffer the peaks/troughs of oral dosing'"`UNIQ--ref-000003BA-QINU`"'
~14 days'"`UNIQ--ref-00001103-QINU`"'
~14 hours (adults); longer in elderly and renal impairment'"`UNIQ--ref-0000113F-QINU`"'
~14 hours'"`UNIQ--ref-00000CCC-QINU`"'
~15 hours (IR)'"`UNIQ--ref-00000023-QINU`"'
~15 hours (parent); nordoxepin active metabolite ~30 hours'"`UNIQ--ref-00000020-QINU`"'
~16-18 hours'"`UNIQ--ref-00001092-QINU`"'
~16-23 hours
~165 hours (~1 week), among the longest of any GLP-1 RA'"`UNIQ--ref-00000253-QINU`"'
~17 minutes (free acid, the active form, in aqueous humor)'"`UNIQ--ref-00000417-QINU`"'
~17-18 hours (Intuniv ER); ~17 hours (immediate-release)'"`UNIQ--ref-00000020-QINU`"'
~17-19 hours (longer than daridorexant)
~17.5 h
~18 hours (terminal)
~19 hours'"`UNIQ--ref-000000FC-QINU`"'
~2 hours (parent and active β-hydroxy acid metabolite); pharmacodynamic effect lasts 24 hours via target turnover'"`UNIQ--ref-0000017A-QINU`"'
~2 hours (plasma; minimal relevance — local-action drug)'"`UNIQ--ref-00000F7B-QINU`"'
~2 minutes'"`UNIQ--ref-00000E52-QINU`"'
~2-3 hours (parent); pharmacodynamic effect 24 hours via target turnover'"`UNIQ--ref-000003D5-QINU`"'
~2-3.6 hours (plasma)'"`UNIQ--ref-000009A5-QINU`"'
~2-4 hours (parent and active β-hydroxy acid metabolite); pharmacodynamic effect 24 hours via target turnover'"`UNIQ--ref-00000807-QINU`"'
~2.4 hours (Byetta, short, hence the BID schedule)'"`UNIQ--ref-000000ED-QINU`"' · Effective release half-life ~2 weeks (Bydureon)'"`UNIQ--ref-000000EE-QINU`"'
~2.5 hours'"`UNIQ--ref-0000001A-QINU`"'
~2.5-3 hours'"`UNIQ--ref-00001442-QINU`"'
~20 hours
~20 hours (fenofibric acid, the active metabolite)'"`UNIQ--ref-000004AD-QINU`"'
~20-60 minutes (plasma; not the relevant kinetic since urinary concentration matters)'"`UNIQ--ref-000008A3-QINU`"'
~21 hours (with nonlinear pharmacokinetics from CYP2D6 autoinhibition)'"`UNIQ--ref-0000002B-QINU`"'
~21 hours'"`UNIQ--ref-00000028-QINU`"'
~22 hours (parent + active glucuronide)'"`UNIQ--ref-00000450-QINU`"'
~22 hours; longer 54 hours (desmethylazelastine, active metabolite)'"`UNIQ--ref-000013B6-QINU`"'
~22 hours'"`UNIQ--ref-00000AB0-QINU`"'
~24 hours (6-methoxy-2-naphthylacetic acid, the active metabolite)'"`UNIQ--ref-000011F9-QINU`"'
~24 hours (longest of the ARB class; suits patients with morning BP surge)'"`UNIQ--ref-00000AEE-QINU`"'
~24 hours (parent); ~15 days (25(OH)D); 25(OH)D stores persist for months'"`UNIQ--ref-00000330-QINU`"'
~24 hours (parent); ~15 days (25(OH)D); tissue stores months
~25 days
~25 hours
~25 hours apparent (functional duration well over 42 hours from multi-hexamer depot)'"`UNIQ--ref-0000135A-QINU`"'
~25 hours'"`UNIQ--ref-0000129F-QINU`"'
~25-33 hours alone; ~15 hours with enzyme inducers; '''≥60 hours with valproate''' (UGT inhibition)'"`UNIQ--ref-00000025-QINU`"'
~25-44 hours plasma; receptor kinetics drive the once-daily duration'"`UNIQ--ref-000009C0-QINU`"'
~26 h (sertraline; range 13-45 h, longer in females); ~62-104 h (N-desmethylsertraline, weakly active)
~27-31 hours; markedly prolonged in renal/hepatic impairment and with CYP3A4 or P-gp inhibitors'"`UNIQ--ref-00000C72-QINU`"'
~28 days
~3 hours (acyclovir, the active metabolite); longer in renal impairment'"`UNIQ--ref-000005D6-QINU`"'
~3 hours (systemic, when measurable; topical action dominates)'"`UNIQ--ref-000011D9-QINU`"'
~3 hours; significantly prolonged in renal impairment'"`UNIQ--ref-0000090F-QINU`"'
~3 hours'"`UNIQ--ref-000010D1-QINU`"'
~3-4 days plasma; adipose tissue stores last months
~3-7 hours (parent); 16-24 hours including active metabolites'"`UNIQ--ref-00000824-QINU`"'
~30 hours (long, supports once-daily dosing and substantial drug-interaction window after discontinuation)'"`UNIQ--ref-00000A47-QINU`"'
~30-60 minutes'"`UNIQ--ref-00000E76-QINU`"'
~31 days
~35 hours'"`UNIQ--ref-00000026-QINU`"'
~36 hours (terminal much longer due to tissue accumulation in skin/nails)'"`UNIQ--ref-00000EB2-QINU`"'
~4 h
~4 hours (oral)'"`UNIQ--ref-0000001B-QINU`"'
~4 months in erythrocytes (carbonic anhydrase binding in red cells; not relevant to topical IOP duration)'"`UNIQ--ref-00000B0A-QINU`"'
~4-6 hours (plasma); intrathyroidal accumulation gives a much longer functional duration'"`UNIQ--ref-00000ED3-QINU`"'
~40 days (terminal; reflects extensive tissue distribution)'"`UNIQ--ref-000007EC-QINU`"'
~45 minutes (free acid in aqueous humor)'"`UNIQ--ref-00000DA1-QINU`"'
~45-68 hours'"`UNIQ--ref-00000DFE-QINU`"'
~5 days (~120 h)'"`UNIQ--ref-00000059-QINU`"'
~5 days (~120 h)'"`UNIQ--ref-00000303-QINU`"'
~5 h
~5 hours (plasma)'"`UNIQ--ref-00000F9C-QINU`"'
~5 hours in extensive CYP2D6 metabolizers; ~21 hours in CYP2D6 poor metabolizers'"`UNIQ--ref-00000014-QINU`"'
~5 weeks (much longer than finasteride's ~6 hours)'"`UNIQ--ref-00000D59-QINU`"'
~5-10 hours (5-ASA)'"`UNIQ--ref-00000BBE-QINU`"'
~5-20 hours (oral micronized; highly variable)'"`UNIQ--ref-00000726-QINU`"'
~5-6 hours in young men, ~8 hours in elderly'"`UNIQ--ref-00000531-QINU`"'
~5-7 days
~5-8 hours'"`UNIQ--ref-00001164-QINU`"'
~5-9 hours (parent and active metabolites combined)'"`UNIQ--ref-00000492-QINU`"'
~50 days (Depo-Provera; long depot release)'"`UNIQ--ref-00000F20-QINU`"'
~50 hours'"`UNIQ--ref-00000B64-QINU`"'
~50 hours'"`UNIQ--ref-00000C4E-QINU`"'
~57 hours (parent), ~200 h (active metabolite)
~58 days (parent); ~61 days (desethylamiodarone, active metabolite)'"`UNIQ--ref-00000CB3-QINU`"'
~6 days (plasma); hepatic stores last 3-5 years
~6 h (parent compound, immediate-release); ~9-12 h (active metabolite N-desalkylquetiapine, also called norquetiapine)
~6 hours (parent); active metabolite very short-lived but produces irreversible platelet effect'"`UNIQ--ref-000002C4-QINU`"'
~6 hours plasma; long bone retention
~6 hours'"`UNIQ--ref-00000015-QINU`"'
~6 hours'"`UNIQ--ref-00000018-QINU`"'
~6 hours'"`UNIQ--ref-000004CD-QINU`"'
~6-10 hours (oseltamivir carboxylate, the active metabolite)'"`UNIQ--ref-00000E94-QINU`"'
~6-8 hours'"`UNIQ--ref-0000001A-QINU`"'
~6-8 hours'"`UNIQ--ref-00000CF5-QINU`"'
~6.6 h
~60–80 h (memantine); ~70 h (donepezil)
~66 hours
~68 hours (terminal; reflects deep tissue accumulation, much longer than plasma)'"`UNIQ--ref-000003FC-QINU`"'
~7 days (euthyroid); longer in hypothyroidism (~9-10 days), shorter in hyperthyroidism'"`UNIQ--ref-00000036-QINU`"'
~7 hours
~7 hours (parent); ~9 hours (active AR-C124910XX metabolite, accounts for ~30-40% of activity)'"`UNIQ--ref-00000C92-QINU`"'
~7 hours apparent'"`UNIQ--ref-00001374-QINU`"'
~7 hours'"`UNIQ--ref-0000126E-QINU`"'
~7-10 hours (variable; longer in renal impairment)'"`UNIQ--ref-00000FB4-QINU`"'
~7-12 hours
~7.1 hours
~7.8 hours (fluticasone propionate, inhaled systemic exposure)'"`UNIQ--ref-000001DD-QINU`"'
~70 hours (long, supports once-daily dosing without peak-trough variation)'"`UNIQ--ref-0000001B-QINU`"'
~75 hours (long, accumulates over weeks)'"`UNIQ--ref-00000023-QINU`"'
~8 hours (longer in elderly and renal impairment)'"`UNIQ--ref-00000954-QINU`"'
~8 hours (parent); ~28 hours (desloratadine, the active metabolite, marketed separately as Clarinex)'"`UNIQ--ref-00000621-QINU`"'
~8 hours (shorter than suvorexant and lemborexant)
~8 hours'"`UNIQ--ref-000013F5-QINU`"'
~8-27 hours (highly variable across the population)'"`UNIQ--ref-00000A91-QINU`"'
~80 minutes SC'"`UNIQ--ref-000005F2-QINU`"'
~89 hours (EPA, the active metabolite)'"`UNIQ--ref-000013D1-QINU`"'
~9 hours (terminal)
~9 hours'"`UNIQ--ref-000014C3-QINU`"'
~9-14 hours'"`UNIQ--ref-00000FD2-QINU`"'
~91 hours
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bioavailability:
~33% (oral; fruit juices including grapefruit, orange, and apple reduce absorption substantially via OATP1A2 inhibition — distinctive interaction not seen with most other H1s)'"`UNIQ--ref-00000CCD-QINU`"' (1)
pregnancy:
Generally considered safe; loratadine and cetirizine have more pregnancy data and are typically preferred.<sup class="pcp-cn" title="This claim needs a citation.">[[[Pharmacopedia:Citation needed|citation needed]]]</sup> (1)
legal:
OTC in US (1)
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Drilldown: Medicines
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& onset:
1-2 hours 
generic:
starting dose: (Click arrow to add another value)