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Choose a table:
Medicines (732)
Medicines
> halflife
:
1.5-2 hours'"`UNIQ--ref-00000020-QINU`"'
or
~12 hours
&
bioavailability:
~50% (highly variable)
Use the filters below to narrow your results.
generic:
Duloxetine (1)
brand:
Cymbalta, Drizalma Sprinkle, Irenka, Yentreve (1)
classes:
Antidepressant (1)
·
Anxiolytic (1)
·
SNRI (1)
mechanism:
Serotonin–norepinephrine reuptake inhibition (balanced) (1)
uses:
Depression, anxiety, neuropathic pain, fibromyalgia, chronic musculoskeletal pain (1)
starting dose:
None
(1)
preparations:
None
(1)
fda max:
None
(1)
routes:
Oral (1)
onset:
Mood: 2–4 weeks. Pain: often within 1–2 weeks. (1)
duration:
Chronic daily dosing (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`"'
Approximately 18-24 hours after acute administration; may extend to 36-48 hours with chronic dosing as tissue compartments equilibrate. Serum trough levels should be drawn 12 hours after the last dose for accurate interpretation.'"`UNIQ--ref-00000055-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`"'
Buprenorphine sublingual: 24-42 hours (long, contributes to extended dosing intervals). Norbuprenorphine (active metabolite, weaker mu-agonist): 24-48 hours.'"`UNIQ--ref-0000004F-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 parent ~4 hours (oral); 6-beta-naltrexol (active metabolite) ~13 hours. Vivitrol depot terminal half-life 5-10 days with sustained release from microspheres maintaining blockade for the 4-week dosing interval.'"`UNIQ--ref-0000004F-QINU`"'
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
Search
bioavailability:
(Click arrow to add another value)
None
·
100% (IV)
·
~100% from subcutaneous depot
·
~80% (oral)'"`UNIQ--ref-00000027-QINU`"'
·
70–90% (oral)
·
~100% (oral)'"`UNIQ--ref-0000001C-QINU`"'
·
~50% (oral)'"`UNIQ--ref-00000021-QINU`"'
·
~95%
·
'''Saturable''' via the LAT-1 amino-acid transporter, producing nonlinear pharmacokinetics: ~60% at 300 mg single dose, falling to ~35% at 1200 mg single dose'"`UNIQ--ref-0000002A-QINU`"'
·
10-20% (oral; reduced by food, calcium, antacids, PPIs, tea/coffee; enhanced by ascorbate)
·
100% (IV); essentially complete (oral)
·
100% (IV); rapidly neutralized by gastric acid (oral)
·
16-21% capsule, 25% suspension (oral; iron and antacids reduce absorption substantially)'"`UNIQ--ref-000009E5-QINU`"'
·
25 mg: ~29%; 50 mg: ~35%; food reduces absorption'"`UNIQ--ref-00000C4F-QINU`"'
·
30-40% (oral; increases with repeated dosing as gastric pH rises)'"`UNIQ--ref-000000DF-QINU`"'
·
40-45% (oral; not significantly affected by food)'"`UNIQ--ref-0000025C-QINU`"'
·
40-80% (oral); reduced by food, calcium, iron, PPIs, fiber; take fasting with water'"`UNIQ--ref-00000037-QINU`"'
·
42-58% (oral; dose-dependent)'"`UNIQ--ref-00000AEF-QINU`"'
·
50-60% (oral; decreased with food, but food given anyway for GI tolerance)'"`UNIQ--ref-00000019-QINU`"'
·
60-70% PO at low doses; saturable at high doses (parenteral routes preferred above 15-25 mg/week)'"`UNIQ--ref-000007C9-QINU`"'
Other values:
60-80% (oral)
60-80% (oral; not significantly affected by food)'"`UNIQ--ref-00000843-QINU`"'
64-90% (oral; not affected by food)'"`UNIQ--ref-00000079-QINU`"'
65-75% (oral)'"`UNIQ--ref-0000013F-QINU`"'
70-75% (oral)'"`UNIQ--ref-000007ED-QINU`"'
70-80% (oral)'"`UNIQ--ref-000002A4-QINU`"'
75-90% (oral; minimally affected by food)'"`UNIQ--ref-000001A2-QINU`"'
80-90% oral
90% (oral; food delays but does not reduce absorption)'"`UNIQ--ref-000004F3-QINU`"'
<0.1% systemic absorption (PEG 3350 is too large to absorb intact)
<1% (oral; further reduced by food, calcium, iron, antacids; hence the strict fasting/upright dosing rules)'"`UNIQ--ref-000006C4-QINU`"'
<1% oral (extensive first-pass via CYP3A4); ~30% inhaled lung deposition'"`UNIQ--ref-000001DE-QINU`"'
<3% systemic absorption (the basis of the safety and mechanism)'"`UNIQ--ref-00000F5E-QINU`"'
<5% (extensive hepatic first-pass; food enhances absorption of IR, hence the evening-meal dosing)'"`UNIQ--ref-00000808-QINU`"'
<5% (extensive hepatic first-pass; statin pharmacology is hepatocellular, not systemic)'"`UNIQ--ref-0000017B-QINU`"'
<5% systemic absorption (this is the safety basis)'"`UNIQ--ref-00000DC3-QINU`"'
>90% (oral)'"`UNIQ--ref-0000001C-QINU`"'
>90% (oral; food slows absorption and reduces peaks, hence the post-meal dosing rule)'"`UNIQ--ref-000001BD-QINU`"'
>90% (oral; not affected by food or gastric pH — a major practical advantage over itraconazole)'"`UNIQ--ref-00000A48-QINU`"'
>90% (oral; not significantly affected by food)'"`UNIQ--ref-00001120-QINU`"'
Absolute bioavailability not precisely characterized; food modestly increases exposure
Acid-labile; not effective orally (oral form available outside US as penicillin G salts but penicillin V is preferred for oral use)'"`UNIQ--ref-0000141A-QINU`"'
Adequate (food-dependent, must take with fatty meal)
Adequate oral bioavailability
Adequate oral bioavailability with extended-release formulation
Approximately 50-60% (oral; subject to first-pass metabolism); food does not significantly affect absorption.'"`UNIQ--ref-0000004C-QINU`"'
Buprenorphine ~30% SL; naloxone <10% SL (intentional, inactive sublingually, matters only if injected)
Butalbital well-absorbed; aspirin 50-75%; caffeine ~100%'"`UNIQ--ref-000015B8-QINU`"'
Butalbital well-absorbed; caffeine ~100%; acetaminophen 85-98%'"`UNIQ--ref-000015A0-QINU`"'
Carbonate ~30-40% (best with food and acid); citrate ~24% (absorbable without acid; preferred in achlorhydria, PPI use, post-bariatric)
Codeine ~60% (oral); acetaminophen 85-98%'"`UNIQ--ref-00001518-QINU`"'
Essentially zero systemic absorption from oral or topical routes — the topical-action-only profile is the basis of its safety'"`UNIQ--ref-00000D18-QINU`"'
High (oral)
High (oral); not significantly affected by food'"`UNIQ--ref-00000397-QINU`"'
High (oral)'"`UNIQ--ref-00000FB5-QINU`"'
High (oral)'"`UNIQ--ref-00001051-QINU`"'
High (oral)'"`UNIQ--ref-00001165-QINU`"'
High (oral)'"`UNIQ--ref-000012A0-QINU`"'
High (oral; absorption not affected by food)'"`UNIQ--ref-00000825-QINU`"'
High (oral; food enhances)'"`UNIQ--ref-00001039-QINU`"'
High (oral; food prolongs absorption modestly)'"`UNIQ--ref-00000622-QINU`"'
High (oral; not affected by food, but typically given with the morning meal)'"`UNIQ--ref-0000027D-QINU`"'
High (oral; not significantly affected by food)'"`UNIQ--ref-00000B65-QINU`"'
High with fat-containing meal; reduced in malabsorption
Highly formulation-dependent; the goal is colonic delivery with minimal systemic exposure'"`UNIQ--ref-00000BBF-QINU`"'
Highly route-dependent: SL bypasses first-pass; oral has extensive first-pass (used only for chronic ER preparations); transdermal predictable'"`UNIQ--ref-00000C10-QINU`"'
Highly salt-dependent: citrate ~25-30%; oxide ~4% (limited and causes osmotic diarrhea); chloride ~12%
Highly variable due to saturable first-pass metabolism'"`UNIQ--ref-0000002C-QINU`"'
IM/SC ~100%; oral negligible (extensive first-pass and gut metabolism — hence the no-oral route)'"`UNIQ--ref-00000E53-QINU`"'
IV/IM ~100%; inhaled: minimal systemic; oral: negligible (not used orally for systemic infection)'"`UNIQ--ref-000010B4-QINU`"'
Improved with food'"`UNIQ--ref-00000052-QINU`"'
Increased substantially via CYP2D6 inhibition'"`UNIQ--ref-00001584-QINU`"'
Increased with food (varies by formulation; the micronized and nanocrystal forms are less food-dependent)'"`UNIQ--ref-000004AE-QINU`"'
Inhaled lung deposition with minimal systemic absorption (the basis of the favorable safety profile vs systemic antimuscarinics)'"`UNIQ--ref-00000F7C-QINU`"'
Inhaled lung deposition ~20%; systemic absorption from lung ~33%; oral component negligible'"`UNIQ--ref-000009C1-QINU`"'
Intranasal ~40% systemic; ophthalmic minimal'"`UNIQ--ref-000013B7-QINU`"'
Intranasal: <1% systemic; inhaled lung deposition with extensive first-pass clearance'"`UNIQ--ref-00000F9D-QINU`"'
Limited but adequate; take with food
Local (intramuscular)
Local action; minimal systemic effect
Low systemic absorption (enteric coating delivers drug to colon)'"`UNIQ--ref-0000106C-QINU`"'
Mononitrate ~100% (no first-pass; the principal advantage over dinitrate); dinitrate ~20%'"`UNIQ--ref-00001462-QINU`"'
Naltrexone ~5% (oral, extensive first-pass to 6β-naltrexol); bupropion ER ~87%'"`UNIQ--ref-00001569-QINU`"'
Negligible (not absorbed)'"`UNIQ--ref-00000058-QINU`"'
Negligible systemic absorption'"`UNIQ--ref-0000119D-QINU`"'
Not characterized; oral dosing once daily
Not formally characterized for the combination
Not formally characterized in humans.
Not formally established
Not formally established (high SC)
Not formally established; oral once-daily adequate
Not well characterized
Not well characterized'"`UNIQ--ref-00000019-QINU`"'
Olanzapine 60% (oral); fluoxetine high (oral)'"`UNIQ--ref-0000154E-QINU`"'
Oral bioavailability is not precisely established in the label but absorption is rapid and essentially complete. Food delays peak plasma concentration by approximately one hour but does not reduce the extent of absorption.'"`UNIQ--ref-0000006F-QINU`"'
Oral bioavailability of psilocin from administered psilocybin approximately 50%
Oral bioavailability suitable for daily dosing
Oral non-undecanoate has essentially zero bioavailability (hepatic first-pass)
Oral ~1-3% via passive diffusion at high doses (independent of intrinsic factor); IM/SC ~100%
Oral ~5% (extensive first-pass to estrone and conjugates); transdermal bypasses first-pass, giving more physiologic estradiol:estrone ratio'"`UNIQ--ref-000003BB-QINU`"'
Oral ~70%; depot IM provides sustained release over weeks'"`UNIQ--ref-0000101B-QINU`"'
Oral ~90%; depot IM essentially 100% over the dosing interval'"`UNIQ--ref-00000F21-QINU`"'
Oral: very low (extensive first-pass); micronization improves uptake somewhat. Vaginal: high local effect with lower systemic levels (first-uterine-pass concentration)'"`UNIQ--ref-00000727-QINU`"'
Oxycodone 60-87%; aspirin 50-75%'"`UNIQ--ref-000014FB-QINU`"'
Rapid absorption; absolute bioavailability not formally established
Reasonable (not formally established as a percentage)
SC ~47%–65%'"`UNIQ--ref-0000005A-QINU`"'
SC ~55%'"`UNIQ--ref-0000018B-QINU`"'
SC ~65%–75%<sup class="pcp-cn" title="This claim needs a citation.">[[[Pharmacopedia:Citation needed|citation needed]]]</sup>
SC ~80%<sup class="pcp-cn" title="This claim needs a citation.">[[[Pharmacopedia:Citation needed|citation needed]]]</sup>
SC ~89%<sup class="pcp-cn" title="This claim needs a citation.">[[[Pharmacopedia:Citation needed|citation needed]]]</sup> · Oral ~0.4–1% (SNAC-enhanced)'"`UNIQ--ref-00000254-QINU`"'
Sandimmune: highly variable (~30%); Neoral microemulsion: ~50%, less variable; '''Sandimmune and Neoral are NOT bioequivalent and not interchangeable''''"`UNIQ--ref-00000A92-QINU`"'
Substantially improved with high-fat meal; take with food'"`UNIQ--ref-000013D2-QINU`"'
Sumatriptan ~15% (oral; substantial first-pass); naproxen ~95%'"`UNIQ--ref-000015D2-QINU`"'
Tablet ~100% relative to oral solution; extensive first-pass metabolism
Topical with limited but measurable systemic absorption'"`UNIQ--ref-00001219-QINU`"'
Topical with measurable systemic absorption (small CA inhibition observed clinically with chronic use)'"`UNIQ--ref-00000B0B-QINU`"'
Topical with minimal systemic absorption'"`UNIQ--ref-000011DA-QINU`"'
Topical with minimal systemic absorption'"`UNIQ--ref-0000123A-QINU`"'
Topical with minimal systemic absorption'"`UNIQ--ref-00001288-QINU`"'
Topical with variable systemic absorption depending on body site, occlusion, and skin integrity; HPA-axis suppression is documented even with brief courses to large areas'"`UNIQ--ref-0000079F-QINU`"'
Topical/intranasal: high local, low systemic; intra-articular: local depot then systemic absorption'"`UNIQ--ref-00000667-QINU`"'
Topical/oral local action with minimal systemic absorption'"`UNIQ--ref-00001399-QINU`"'
Topical: local effect on enamel; systemic supplementation has high oral bioavailability with skeletal accumulation
Topical: minimal systemic absorption (oral systemic 5-FU not used due to poor and variable absorption)'"`UNIQ--ref-000011BF-QINU`"'
Topical: minimal systemic absorption with normal skin; oral: variable, induced metabolism with repeated dosing'"`UNIQ--ref-00000BA4-QINU`"'
Topical: minimal systemic; oral: pH-dependent, requires gastric acid'"`UNIQ--ref-00000889-QINU`"'
Topical: minimal systemic; troche: ~3% systemic'"`UNIQ--ref-00000F46-QINU`"'
Topical; clinically meaningful systemic absorption can produce systemic α2 effects (somnolence, hypotension), especially in children'"`UNIQ--ref-000010D2-QINU`"'
Topical; minimal systemic absorption'"`UNIQ--ref-00000418-QINU`"'
Topical; minimal systemic absorption'"`UNIQ--ref-00000A03-QINU`"'
Topical; minimal systemic absorption'"`UNIQ--ref-00000DA2-QINU`"'
Tramadol ~75% (oral); acetaminophen 85-98%'"`UNIQ--ref-00001531-QINU`"'
Variable (oral; rapidly conjugated to active glucuronide; food does not affect)'"`UNIQ--ref-00000451-QINU`"'
Variable; reduced by food, calcium, iron, PPIs'"`UNIQ--ref-00000037-QINU`"'
~0.3% (oral; extensive first-pass via CYP3A4 and P-glycoprotein-mediated efflux at the intestinal and blood-brain barriers limit systemic and CNS exposure at therapeutic doses)'"`UNIQ--ref-00000FD3-QINU`"'
~10% inhaled reaches systemic circulation; ~50% PO'"`UNIQ--ref-0000009A-QINU`"'
~100% (oral); highly (~90%) protein-bound, with non-linear binding above therapeutic levels (free fraction matters clinically in hypoalbuminemia)'"`UNIQ--ref-0000097D-QINU`"'
~100% (oral)'"`UNIQ--ref-0000001B-QINU`"'
~100% (oral)'"`UNIQ--ref-00000020-QINU`"'
~100% (oral)'"`UNIQ--ref-00000027-QINU`"'
~100% (oral)'"`UNIQ--ref-00000706-QINU`"'
~100% (oral, but oral use is limited to continuation from parenteral)'"`UNIQ--ref-00000021-QINU`"'
~100% (oral; absorption complete)'"`UNIQ--ref-0000126F-QINU`"'
~100% (oral; food delays absorption, hence pre-meal dosing for IR)'"`UNIQ--ref-000002DA-QINU`"'
~100% (oral; near-complete absorption)'"`UNIQ--ref-00000018-QINU`"'
~100% (oral; not significantly affected by food)'"`UNIQ--ref-00000493-QINU`"'
~100% both components
~100% from subcutaneous depot (by definition of the route)
~12% (extensive metabolizers); ~96% (poor metabolizers)
~14% (extensive hepatic first-pass)'"`UNIQ--ref-0000001C-QINU`"'
~14% (oral; substantial first-pass); ~97% (subcutaneous); ~17% (nasal)'"`UNIQ--ref-00000016-QINU`"'
~15% (extensive hepatic first-pass)
~15% (oral; highly variable due to extensive and variable first-pass metabolism)'"`UNIQ--ref-00000022-QINU`"'
~17% (oral; food slightly reduces absorption)'"`UNIQ--ref-000003D6-QINU`"'
~20% (oral; hydrophilic, minimal CYP metabolism, mostly excreted unchanged in bile)'"`UNIQ--ref-000000FD-QINU`"'
~20% (oral; valacyclovir prodrug raises this to ~55%)'"`UNIQ--ref-00000910-QINU`"'
~20-35% (oral; extensive first-pass via CYP3A4 with R/S enantiomer differences)'"`UNIQ--ref-00000A6C-QINU`"'
~22–25%
~25% (extensive hepatic first-pass)
~25% (high first-pass)
~25% (oral)'"`UNIQ--ref-00000019-QINU`"'
~25% (oral, with extensive first-pass)'"`UNIQ--ref-00000023-QINU`"'
~25% (oral; extensive first-pass)'"`UNIQ--ref-0000001B-QINU`"'
~25% (oral; food does not affect absorption)'"`UNIQ--ref-0000005A-QINU`"'
~25% (oral; food reduces absorption ~40%)'"`UNIQ--ref-000004CE-QINU`"'
~25-35% (extensive first-pass), increased by food which slows absorption and reduces orthostatic risk'"`UNIQ--ref-0000001C-QINU`"'
~25-40% (oral; extensive first-pass)'"`UNIQ--ref-00000021-QINU`"'
~25-50% (oral; substantial first-pass via NAT2 acetylation, phenotype-dependent)'"`UNIQ--ref-00000688-QINU`"'
~26% (oral; prodrug hydrolyzed by intestinal esterases to active olmesartan; not affected by food)'"`UNIQ--ref-0000056D-QINU`"'
~28% (oral; food slows but does not reduce absorption)'"`UNIQ--ref-00000C33-QINU`"'
~30% (high first-pass)
~30% (oral)'"`UNIQ--ref-00000021-QINU`"'
~30% (oral)'"`UNIQ--ref-0000117D-QINU`"'
~30% (sublingual; the primary therapeutic route); ~10-20% (oral swallowed, low due to first-pass); ~50% (buccal Belbuca); transdermal Butrans bypasses first-pass.'"`UNIQ--ref-00000050-QINU`"'
~30-65% (oral; acid-labile, hence enteric-coated formulations; food affects absorption variably)'"`UNIQ--ref-00000D3F-QINU`"'
~33%
~33% (extensive first-pass via CYP2C9 and CYP3A4)'"`UNIQ--ref-000000BD-QINU`"'
~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`"'
~33-55% (IR); reduced by food'"`UNIQ--ref-0000001B-QINU`"'
~35% (oral, extensive first-pass; not used orally for systemic effect); ~100% (IV)'"`UNIQ--ref-00000021-QINU`"'
~36% (oral)'"`UNIQ--ref-00000C93-QINU`"'
~37% (oral, as axetil prodrug; food modestly improves absorption)'"`UNIQ--ref-00000FFA-QINU`"'
~37% (oral; food does not affect)'"`UNIQ--ref-00000A23-QINU`"'
~37% (oral; food reduces absorption modestly)'"`UNIQ--ref-000003FD-QINU`"'
~38% (oral; non-acidic prodrug improves GI tolerability over many other NSAIDs)'"`UNIQ--ref-000011FA-QINU`"'
~4% (extensive first-pass metabolism)'"`UNIQ--ref-0000001E-QINU`"'
~40%
~40% (oral); food and formulation substantially alter the absorption profile'"`UNIQ--ref-0000001E-QINU`"'
~40% (oral; extensive first-pass via CYP3A4)'"`UNIQ--ref-00000643-QINU`"'
~40% (oral; food does not significantly affect)'"`UNIQ--ref-00000EB3-QINU`"'
~40-60% (oral, with significant first-pass)'"`UNIQ--ref-00000027-QINU`"'
~44%
~45% (oral)'"`UNIQ--ref-00000C73-QINU`"'
~45% (oral; substantially higher than sumatriptan's ~14%)'"`UNIQ--ref-00000013-QINU`"'
~45%'"`UNIQ--ref-00000027-QINU`"'
~48% intranasal
~5% intranasal
~5-20% (extensive first-pass), highly variable between individuals'"`UNIQ--ref-00000024-QINU`"'
~5-40% (oral, highly variable due to extensive first-pass metabolism; mean ~5-10% for parent naltrexone with the majority of pharmacologic effect coming from 6-beta-naltrexol). IM Vivitrol bypasses first-pass entirely.'"`UNIQ--ref-00000050-QINU`"'
~50%
~50% (highly variable)
~50% (oral); systemic absorption from ophthalmic application is clinically meaningful via nasolacrimal drainage'"`UNIQ--ref-0000001C-QINU`"'
~50% (oral)'"`UNIQ--ref-00000027-QINU`"'
~50% (oral)'"`UNIQ--ref-000002C5-QINU`"'
~50% (oral; highly variable)'"`UNIQ--ref-00000CB4-QINU`"'
~50% (oral; highly variable, 10-100%, hence the standard 1:2 IV-to-PO conversion)'"`UNIQ--ref-00000223-QINU`"'
~50% (oral; not significantly affected by food)'"`UNIQ--ref-000001FC-QINU`"'
~50% (oral; reduced by buffering and enteric coating but onset clinically similar)'"`UNIQ--ref-00000028-QINU`"'
~50% (oral; substantial first-pass)'"`UNIQ--ref-00000024-QINU`"'
~50% (variable, CYP2D6-dependent for analgesic effect).
~50% IR (extensive first-pass via CYP3A4); ER products release-rate-limited'"`UNIQ--ref-0000074E-QINU`"'
~50-60% (oral; food enhances)
~50-60% (oral; substantial first-pass metabolism)'"`UNIQ--ref-0000002A-QINU`"'
~53% (oral)'"`UNIQ--ref-00000024-QINU`"'
~55% (oral)'"`UNIQ--ref-00000016-QINU`"'
~55% bioavailability of acyclovir after valacyclovir oral (vs ~20% from oral acyclovir directly)'"`UNIQ--ref-000005D7-QINU`"'
~58% (extended-release); ~80% (immediate-release)'"`UNIQ--ref-00000021-QINU`"'
~6% IR oral (substantial first-pass to active N-desethyl metabolite, which contributes most of the antimuscarinic adverse effects); transdermal bypasses first-pass and is better tolerated'"`UNIQ--ref-000006E2-QINU`"'
~6-13% inhaled lung deposition; ~10% oral (Entocort EC; extensive first-pass via CYP3A4 — this is the basis of the favorable hepatic-targeted local-effect profile in IBD)'"`UNIQ--ref-000009A6-QINU`"'
~60%
~60% (oral); ~100% (IM)'"`UNIQ--ref-00000027-QINU`"'
~60% (oral)'"`UNIQ--ref-00000379-QINU`"'
~60% (oral)'"`UNIQ--ref-00000D5A-QINU`"'
~60% (oral; food does not affect absorption)'"`UNIQ--ref-00000B85-QINU`"'
~60% (oral; phenoxymethyl modification makes it acid-stable, unlike penicillin G which is destroyed by gastric acid)'"`UNIQ--ref-00000E77-QINU`"'
~60% (oral; substantially increased with high-fat meal)'"`UNIQ--ref-00001093-QINU`"'
~60% from subcutaneous depot (reduced by reversible albumin binding via the myristic acid side chain that also extends duration)'"`UNIQ--ref-00001375-QINU`"'
~60-87% (oral; high and more consistent than codeine or hydrocodone, making efficacy less CYP2D6-genotype-dependent)'"`UNIQ--ref-0000001E-QINU`"'
~60-87% oxycodone (high and predictable, less CYP-genotype-dependent than codeine or hydrocodone); 85-98% acetaminophen'"`UNIQ--ref-000014E3-QINU`"'
~60–70% (oral)
~62%
~63% (oral)'"`UNIQ--ref-00000532-QINU`"'
~63% (oral; extensive first-pass)'"`UNIQ--ref-00000015-QINU`"'
~64% (oral)'"`UNIQ--ref-00000016-QINU`"'
~64% (oral; not significantly affected by food)'"`UNIQ--ref-0000015F-QINU`"'
~64% from SC depot'"`UNIQ--ref-00001104-QINU`"'
~64-90% (oral; increases at higher doses and with multi-day dosing)'"`UNIQ--ref-000008E9-QINU`"'
~65% (oral)'"`UNIQ--ref-0000001E-QINU`"'
~65% (oral)'"`UNIQ--ref-00000784-QINU`"'
~65% (oral)'"`UNIQ--ref-00000AB1-QINU`"'
~65% (oral)'"`UNIQ--ref-000013F6-QINU`"'
~67% (oral)'"`UNIQ--ref-00000B26-QINU`"'
~70% (oral)'"`UNIQ--ref-0000001B-QINU`"'
~70% (oral)'"`UNIQ--ref-00000022-QINU`"'
~70% (oral)'"`UNIQ--ref-000008C5-QINU`"'
~70% (oral; bioavailability and absorption are improved with food)'"`UNIQ--ref-00000355-QINU`"'
~70% (oral; reduced by divalent cations — antacids, iron, calcium, dairy)'"`UNIQ--ref-00000939-QINU`"'
~70-85% (oral)'"`UNIQ--ref-00000027-QINU`"'
~70-85% (oral, high relative to other opioids)
~70-90% at typical doses; saturable at high doses (>500 mg)
~72% (with food); much lower fasting (~36%)
~72% from SC depot'"`UNIQ--ref-00001480-QINU`"'
~72% oral; ~85% smoked'"`UNIQ--ref-00000066-QINU`"'
~75%
~75% (IR, rises with multi-dose administration due to saturable first-pass)'"`UNIQ--ref-0000001E-QINU`"'
~75% (oral, as the active carboxylate after hepatic esterase activation)'"`UNIQ--ref-00000E95-QINU`"'
~75% (oral; absorption improved with fat-containing meal)
~75% (oral; fat-soluble, absorption requires intact biliary/lipid digestion)'"`UNIQ--ref-00000331-QINU`"'
~75-85% (oral); ~60% (transdermal at steady state)'"`UNIQ--ref-00000027-QINU`"'
~75–90% (oral)
~77% (oral; not affected by food or antacids)'"`UNIQ--ref-0000011E-QINU`"'
~78% (oral; high-fat meal modestly reduces but is not clinically significant)'"`UNIQ--ref-00000553-QINU`"'
~80% (oral)'"`UNIQ--ref-0000001B-QINU`"'
~80% (oral)'"`UNIQ--ref-0000001E-QINU`"'
~80% (oral)'"`UNIQ--ref-00000029-QINU`"'
~80% (oral)'"`UNIQ--ref-00000310-QINU`"'
~80% (oral)'"`UNIQ--ref-00000BEC-QINU`"'
~80% (oral)'"`UNIQ--ref-00000E2C-QINU`"'
~80% (oral; predictable absorption — a substantive practical advantage over furosemide whose oral absorption is 10-100% variable)'"`UNIQ--ref-00000B47-QINU`"'
~80% (oral; reduced by significant first-pass)'"`UNIQ--ref-00000EFA-QINU`"'
~80-100% (oral)'"`UNIQ--ref-00000027-QINU`"'
~80-100% with food at 15-20 mg doses (10 mg dose: ~80% without food); '''must be taken with food''' at therapeutic doses'"`UNIQ--ref-00000514-QINU`"'
~80-95% (oral; more reliable than furosemide, comparable to torsemide)'"`UNIQ--ref-00000DE4-QINU`"'
~80-99% (oral)'"`UNIQ--ref-00000868-QINU`"'
~82%
~82% SC
~85-90% (oral; not significantly affected by food)'"`UNIQ--ref-00000955-QINU`"'
~85-98% (oral)'"`UNIQ--ref-000006A6-QINU`"'
~87% (oral)'"`UNIQ--ref-00000024-QINU`"'
~87% (oral)'"`UNIQ--ref-00000766-QINU`"'
~89% (oral)'"`UNIQ--ref-00000021-QINU`"'
~90% (low first-pass)
~90% (oral)'"`UNIQ--ref-00000018-QINU`"'
~90% (oral)'"`UNIQ--ref-00000024-QINU`"'
~90% (oral)'"`UNIQ--ref-00000027-QINU`"'
~90% (oral)'"`UNIQ--ref-00000DFF-QINU`"'
~90% (oral)'"`UNIQ--ref-00001140-QINU`"'
~90% (oral)'"`UNIQ--ref-00001443-QINU`"'
~90% (oral, low first-pass)'"`UNIQ--ref-0000001C-QINU`"'
~90% (oral; food increases absorption)'"`UNIQ--ref-000008A4-QINU`"'
~90% (oral; not affected by food but reduced by divalent cations)'"`UNIQ--ref-00000D83-QINU`"'
~93% (oral); ~90% (rectal)'"`UNIQ--ref-00000027-QINU`"'
~93% (oral)'"`UNIQ--ref-00000ED4-QINU`"'
~95% (oral)'"`UNIQ--ref-0000001F-QINU`"'
~95% (oral)'"`UNIQ--ref-0000002A-QINU`"'
~95% (oral)'"`UNIQ--ref-0000149E-QINU`"'
~95% (oral)'"`UNIQ--ref-000014C4-QINU`"'
~95% (oral; reduced by dairy, antacids, iron via divalent-cation chelation, though less than for tetracycline itself)'"`UNIQ--ref-0000047E-QINU`"'
~96% (oral)'"`UNIQ--ref-00000AD2-QINU`"'
~96% after red blood cell hydrolytic cleavage releases dextroamphetamine'"`UNIQ--ref-00000018-QINU`"'
~98% (oral)'"`UNIQ--ref-00000026-QINU`"'
~99% (caffeine)
~99% (oral)'"`UNIQ--ref-0000002A-QINU`"'
~99% (oral; matched 1:1 IV-to-PO conversion)'"`UNIQ--ref-00000CF6-QINU`"'
≥90% (linear pharmacokinetics, distinguishing it favorably from gabapentin's saturable LAT-1 absorption)'"`UNIQ--ref-00000027-QINU`"'
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pregnancy:
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Rx-only (1)
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Drilldown: Medicines
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:
1.5-2 hours'"`UNIQ--ref-00000020-QINU`"' 
generic:
halflife: (Click arrow to add another value)