Drilldown: Medicines
Medicines > fda max 
:
10 mg/d (adults) or
30 mg/d (acute VTE first 21 days as 15 mg BID); otherwise 20 mg/d or
400 mg/d
:
10 mg/d (adults) or
30 mg/d (acute VTE first 21 days as 15 mg BID); otherwise 20 mg/d or
400 mg/d Use the filters below to narrow your results.
generic:
brand:
classes:
Beta Blocker (1) ·
Cardioselective (β1) (1) ·
[[:Category:Antiarrhythmics|Antiarrhythmic (Vaughan-Williams class IC)]] (1) ·
[[:Category:Antiasthmatic_agents|Antiasthmatic]] (1) ·
[[:Category:Antibacterials|Antibacterial]] (1) ·
[[:Category:Anticoagulants|Anticoagulant]] (1) ·
[[:Category:Antihistamines|Antihistamine]] (2) ·
[[:Category:Direct_factor_Xa_inhibitors|Direct factor Xa inhibitor]] (1) ·
[[:Category:DOACs|Direct oral anticoagulant (DOAC)]] (1) ·
[[:Category:Fluoroquinolones|Fluoroquinolone antibiotic]] (1) ·
[[:Category:H1_receptor_antagonists|Histamine H1 receptor antagonist (second-generation)]] (2) ·
[[:Category:Leukotriene_receptor_antagonists|Leukotriene receptor antagonist]] (1)
mechanism:
None (1) ·
Cardioselective β1-adrenergic antagonist. Selectivity is dose-dependent and partially lost at higher doses. (1) ·
'"`UNIQ--vote-00000391-QINU`"' Minimal CYP metabolism; mostly renally cleared unchanged. Cetirizine is the active racemate; levocetirizine is the active R-enantiomer marketed separately'"`UNIQ--ref-00000392-QINU`"'. (1) ·
'"`UNIQ--vote-0000050D-QINU`"' CYP3A4 (primary) and P-glycoprotein substrate; strong dual inhibitors or inducers materially shift exposure. Reversal: andexanet alfa for life-threatening bleeding; 4F-PCC commonly used off-label when andexanet unavailable'"`UNIQ--ref-0000050E-QINU`"'. (1) ·
'"`UNIQ--vote-0000061E-QINU`"' Less reliably anticholinergic than first-generation H1s; minimal antiemetic effect. Desloratadine (Clarinex) is the active enantiomer-of-metabolite version marketed as a Rx alternative. (1) ·
'"`UNIQ--vote-00000D7A-QINU`"' Substantial QT-interval prolongation — the most QT-prolonging fluoroquinolone — limits use in patients on other QT-prolonging agents or with electrolyte abnormalities'"`UNIQ--ref-00000D7B-QINU`"'. (1) ·
'"`UNIQ--vote-0000113A-QINU`"' Concomitant β-blocker or CCB is required when used for AF to prevent 1:1 atrial flutter conduction (flecainide can slow atrial rate to a level where AV conduction allows dangerous ventricular rates). CYP2D6 substrate'"`UNIQ--ref-0000113B-QINU`"'. (1)
uses:
'"`UNIQ--vote-0000015B-QINU`"', '"`UNIQ--vote-0000015C-QINU`"', '"`UNIQ--vote-0000015D-QINU`"' (1) ·
'"`UNIQ--vote-00000393-QINU`"', '"`UNIQ--vote-00000394-QINU`"', '"`UNIQ--vote-00000395-QINU`"' (1) ·
'"`UNIQ--vote-000004F5-QINU`"', '"`UNIQ--vote-000004F6-QINU`"', '"`UNIQ--vote-000004F7-QINU`"', '"`UNIQ--vote-000004F8-QINU`"', '"`UNIQ--vote-000004F9-QINU`"' (1) ·
'"`UNIQ--vote-0000050F-QINU`"', '"`UNIQ--vote-00000510-QINU`"', '"`UNIQ--vote-00000511-QINU`"', '"`UNIQ--vote-00000512-QINU`"' (1) ·
'"`UNIQ--vote-0000061F-QINU`"', '"`UNIQ--vote-00000620-QINU`"' (1) ·
'"`UNIQ--vote-00000D7C-QINU`"', '"`UNIQ--vote-00000D7D-QINU`"', '"`UNIQ--vote-00000D7E-QINU`"', '"`UNIQ--vote-00000D7F-QINU`"', '"`UNIQ--vote-00000D80-QINU`"', '"`UNIQ--vote-00000D81-QINU`"' (1) ·
'"`UNIQ--vote-0000113C-QINU`"', '"`UNIQ--vote-0000113D-QINU`"', '"`UNIQ--vote-0000113E-QINU`"' (1)
starting dose:
10 mg PO once daily (1) ·
10 mg PO once daily (5 mg in older adults or if sedation occurs) (1) ·
10 mg PO once daily in the evening (adults); 4-5 mg in children (1) ·
25–50 mg BID (tartrate); 25–100 mg daily (succinate); 12.5 mg daily in HFrEF (1) ·
400 mg PO/IV once daily (1) ·
50 mg PO BID; titrate to 100-200 mg BID; pill-in-pocket 200-300 mg PO single dose for AF conversion (1) ·
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 (1)
preparations:
10 mg tablets; 4 mg, 5 mg chewables; 4 mg granules (1) ·
10 mg tablets; 5 mg ODT and chewables; 1 mg/mL oral syrup; combo Claritin-D (with pseudoephedrine, behind-counter) (1) ·
2.5, 10, 15, 20 mg tablets (1) ·
400 mg tablets; 400 mg/250 mL IV; 0.5% ophthalmic solution (1) ·
5 mg, 10 mg tablets; 5 mg, 10 mg chewables; 1 mg/mL oral syrup; OTC (1) ·
50, 100, 150 mg tablets (1) ·
Tartrate: 25, 50, 100 mg tabs; 1 mg/mL IV. Succinate ER: 25, 50, 100, 200 mg. (1)
fda max: (Click arrow to add another value)
routes:
onset:
1-3 hours (slower onset than cetirizine; symptom relief somewhat less) (1) ·
1–2 h (PO); immediate (IV) (1) ·
30-60 minutes (1) ·
AF conversion within hours of single PO dose (1) ·
Bronchodilation within 1-2 hours; full controller effect 1-2 weeks (1) ·
Hours (1) ·
Peak anticoagulant effect 2-4 hours (1)
duration:
halflife:
2.7-5.5 hours'"`UNIQ--ref-0000015E-QINU`"' (1) ·
3–7 h (1) ·
5-9 hours (elderly: 11-13 hours)'"`UNIQ--ref-00000513-QINU`"' (1) ·
8-10 hours (longer in elderly and renal impairment)'"`UNIQ--ref-00000396-QINU`"' (1) ·
~12 hours'"`UNIQ--ref-00000D82-QINU`"' (1) ·
~14 hours (adults); longer in elderly and renal impairment'"`UNIQ--ref-0000113F-QINU`"' (1) ·
~8 hours (parent); ~28 hours (desloratadine, the active metabolite, marketed separately as Clarinex)'"`UNIQ--ref-00000621-QINU`"' (1)
bioavailability:
High (oral); not significantly affected by food'"`UNIQ--ref-00000397-QINU`"' (1) ·
High (oral; food prolongs absorption modestly)'"`UNIQ--ref-00000622-QINU`"' (1) ·
~50% (1) ·
~64% (oral; not significantly affected by food)'"`UNIQ--ref-0000015F-QINU`"' (1) ·
~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`"' (1) ·
~90% (oral)'"`UNIQ--ref-00001140-QINU`"' (1) ·
~90% (oral; not affected by food but reduced by divalent cations)'"`UNIQ--ref-00000D83-QINU`"' (1)
pregnancy:
'''Avoid in pregnancy where alternatives exist''' (animal cartilage toxicity).<sup class="pcp-cn" title="This claim needs a citation.">[[[Pharmacopedia:Citation needed|citation needed]]]</sup> (1) ·
Avoid in pregnancy; switch to LMWH. Crosses placenta; warfarin-class concerns about fetal hemorrhage and teratogenicity make heparins the preferred class.<sup class="pcp-cn" title="This claim needs a citation.">[[[Pharmacopedia:Citation needed|citation needed]]]</sup> (1) ·
Category C (1) ·
Generally considered safe; pregnancy registries do not show increased major malformation risk.<sup class="pcp-cn" title="This claim needs a citation.">[[[Pharmacopedia:Citation needed|citation needed]]]</sup> (1) ·
Generally considered safe; widely used. Levocetirizine (the R-enantiomer) is an alternative with similar safety.<sup class="pcp-cn" title="This claim needs a citation.">[[[Pharmacopedia:Citation needed|citation needed]]]</sup> (1) ·
Generally considered safe; widely used. Loratadine and cetirizine are the most-recommended 2nd-gen H1s in pregnancy and lactation.<sup class="pcp-cn" title="This claim needs a citation.">[[[Pharmacopedia:Citation needed|citation needed]]]</sup> (1) ·
Use in fetal SVT (transplacental antiarrhythmic therapy) is established; otherwise weigh against alternatives.<sup class="pcp-cn" title="This claim needs a citation.">[[[Pharmacopedia:Citation needed|citation needed]]]</sup> (1)
legal:
OTC in US (2) ·
Rx-only in US (1) ·
[[USLegal:Prescription only|Rx-only]] in US (1) ·
[[USLegal:Prescription only|Rx-only]] in US. '''Contraindicated in structural heart disease''' — CAST trial (1989) showed increased mortality from class IC agents in patients with prior MI; modern use is limited to structurally normal hearts'"`UNIQ--ref-00001141-QINU`"' (1) ·
[[USLegal:Prescription only|Rx-only]] in US. '''FDA Boxed Warning (2020):''' neuropsychiatric events including agitation, depression, sleep disturbance, and suicidal thoughts; benefit-risk should be reassessed regularly'"`UNIQ--ref-00000160-QINU`"'. (1) ·
[[USLegal:Prescription only|Rx-only]] in US. Carries the same fluoroquinolone-class '''Boxed Warnings''' as ciprofloxacin/levofloxacin'"`UNIQ--ref-00000D84-QINU`"' (1)
Showing below up to 7 results in range #1 to #7.