Drilldown: Medicines
Medicines > duration 
:
24-72 hours per dose (irreversible enzyme binding; effect outlasts plasma exposure) or
N/A
:
24-72 hours per dose (irreversible enzyme binding; effect outlasts plasma exposure) or
N/A Use the filters below to narrow your results.
generic:
brand:
classes:
APL)]] (1) ·
[[:Category:Antimetabolites|Antimetabolite (pyrimidine analog)]] (1) ·
[[:Category:Antineoplastics|Antineoplastic (oral (1) ·
[[:Category:Antineoplastics|Antineoplastic]] (1) ·
[[:Category:Antisecretory_agents|Gastric acid suppressant]] (1) ·
[[:Category:B-vitamins|B-vitamin]] (1) ·
[[:Category:Proton_pump_inhibitors|Proton pump inhibitor (PPI)]] (1) ·
[[:Category:Retinoids|Retinoid]] (1) ·
[[:Category:Topical_retinoids|Topical retinoid]] (1) ·
[[:Category:Vitamins|Vitamin]] (1)
mechanism:
None (2) ·
'"`UNIQ--vote-000000D8-QINU`"' Recovery of acid output requires synthesis of new pump enzyme. CYP2C19 substrate; PGx genotype substantially affects exposure and efficacy'"`UNIQ--ref-000000D9-QINU`"'. (1) ·
'"`UNIQ--vote-0000124C-QINU`"' The 400 mg/d dose for migraine prophylaxis is supported by randomized trials (Schoenen 1998) and remains a low-risk evidence-based supplement option. Characteristic bright-yellow urine fluorescence with high-dose oral supplementation. (1)
uses:
'"`UNIQ--vote-000000DA-QINU`"', '"`UNIQ--vote-000000DB-QINU`"', '"`UNIQ--vote-000000DC-QINU`"', '"`UNIQ--vote-000000DD-QINU`"' (1) ·
'"`UNIQ--vote-00000BA0-QINU`"', '"`UNIQ--vote-00000BA1-QINU`"', '"`UNIQ--vote-00000BA2-QINU`"' (1) ·
'"`UNIQ--vote-000011BA-QINU`"', '"`UNIQ--vote-000011BB-QINU`"', '"`UNIQ--vote-000011BC-QINU`"', '"`UNIQ--vote-000011BD-QINU`"' (1) ·
'"`UNIQ--vote-0000124D-QINU`"', '"`UNIQ--vote-0000124E-QINU`"', '"`UNIQ--vote-0000124F-QINU`"' (1)
starting dose:
20 mg PO once daily 30-60 minutes before breakfast (1) ·
Migraine prophylaxis: 400 mg PO daily; deficiency replacement 5-30 mg/d (1) ·
Topical: 0.5-5% cream/solution to lesions BID × 2-4 weeks; systemic IV: regimen-specific in cancer chemotherapy (1) ·
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 (1)
preparations:
0.5% (Carac), 1% (Fluoroplex), 5% (Efudex) topical creams/solutions; 50 mg/mL IV (1) ·
10, 20, 40 mg delayed-release capsules and tablets; 2 mg/mL oral suspension; immediate-release combo with sodium bicarbonate (Zegerid) (1) ·
25, 50, 100, 250, 400 mg tablets; OTC (1) ·
Topical 0.01-0.1% creams, gels, micropsheres, lotions; oral 10 mg capsules (Vesanoid) (1)
fda max:
routes:
onset:
Migraine effect after 1-3 months of daily use (1) ·
Symptom relief 1-4 days; full acid suppression after 3-5 days of dosing (1) ·
Topical: inflammation, erythema, crusting at 2 weeks; complete response weeks to months after course (1) ·
Topical: irritation within days; acne improvement 6-12 weeks; oral APL response within days (1)
duration: (Click arrow to add another value)
halflife:
0.5-1.5 hours (plasma); pharmacodynamic effect persists 24+ hours'"`UNIQ--ref-000000DE-QINU`"' (1) ·
~0.5-2 hours (oral)'"`UNIQ--ref-00000BA3-QINU`"' (1) ·
~1-2 hours plasma (riboflavin itself); FAD/FMN tissue cofactors are continuous (1) ·
~10-20 minutes systemically (rapid hepatic and erythrocyte dihydropyrimidine dehydrogenase clearance)'"`UNIQ--ref-000011BE-QINU`"' (1)
bioavailability:
30-40% (oral; increases with repeated dosing as gastric pH rises)'"`UNIQ--ref-000000DF-QINU`"' (1) ·
Topical: minimal systemic absorption (oral systemic 5-FU not used due to poor and variable absorption)'"`UNIQ--ref-000011BF-QINU`"' (1) ·
Topical: minimal systemic absorption with normal skin; oral: variable, induced metabolism with repeated dosing'"`UNIQ--ref-00000BA4-QINU`"' (1) ·
~50-60% (oral; food enhances) (1)
pregnancy:
None (1) ·
Safe at replacement and supplement doses.<sup class="pcp-cn" title="This claim needs a citation.">[[[Pharmacopedia:Citation needed|citation needed]]]</sup> (1) ·
Topical: avoid; systemic: contraindicated in pregnancy.<sup class="pcp-cn" title="This claim needs a citation.">[[[Pharmacopedia:Citation needed|citation needed]]]</sup> (1) ·
Widely used in pregnancy; meta-analyses do not show increased malformation risk.<sup class="pcp-cn" title="This claim needs a citation.">[[[Pharmacopedia:Citation needed|citation needed]]]</sup> (1)
Showing below up to 4 results in range #1 to #4.