Drilldown: Medicines

Esomeprazole (1) · Pantoprazole (1) · Valacyclovir (1)

Nexium, Nexium 24HR (OTC) (1) · Protonix (1) · Valtrex (1)

[[:Category:Anti-herpesvirus_agents|Anti-herpesvirus agent]] (1) · [[:Category:Antisecretory_agents|Gastric acid suppressant]] (2) · [[:Category:Antivirals|Antiviral]] (1) · [[:Category:Nucleoside_analogs|Nucleoside analog (prodrug)]] (1) · [[:Category:Proton_pump_inhibitors|Proton pump inhibitor (PPI)]] (2)

'"`UNIQ--vote-00000117-QINU`"' Compared with omeprazole, pantoprazole has a more linear pharmacokinetic profile and is metabolized predominantly via CYP2C19 with CYP3A4 contribution; less CYP2C19-driven drug interaction with clopidogrel than omeprazole'"`UNIQ--ref-00000118-QINU`"'. (1) · '"`UNIQ--vote-000005D0-QINU`"' Selectivity comes from the viral-kinase-only initial phosphorylation step, which is why uninfected cells generate minimal active drug'"`UNIQ--ref-000005D1-QINU`"'. Dose-adjust by renal function; rare crystalline nephropathy with rapid IV acyclovir. (1) · '"`UNIQ--vote-000008E1-QINU`"' Like omeprazole, it is an acid-activated prodrug that covalently and irreversibly binds the H+/K+ ATPase. CYP2C19 PGx remains clinically relevant for both'"`UNIQ--ref-000008E2-QINU`"'. (1)

'"`UNIQ--vote-00000119-QINU`"', '"`UNIQ--vote-0000011A-QINU`"', '"`UNIQ--vote-0000011B-QINU`"', '"`UNIQ--vote-0000011C-QINU`"' (1) · '"`UNIQ--vote-000005D2-QINU`"', '"`UNIQ--vote-000005D3-QINU`"', '"`UNIQ--vote-000005D4-QINU`"', '"`UNIQ--vote-000005D5-QINU`"' (1) · '"`UNIQ--vote-000008E3-QINU`"', '"`UNIQ--vote-000008E4-QINU`"', '"`UNIQ--vote-000008E5-QINU`"', '"`UNIQ--vote-000008E6-QINU`"', '"`UNIQ--vote-000008E7-QINU`"' (1)

20-40 mg PO once daily, 30-60 minutes before breakfast (1) · 40 mg PO or IV once daily (1) · 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 (1)

20 mg, 40 mg delayed-release tablets; 40 mg IV vial; oral suspension 40 mg/packet (1) · 20, 40 mg delayed-release capsules; 2.5, 5, 10, 20, 40 mg oral suspension packets; 20, 40 mg IV (1) · 500 mg, 1 g tablets (1)

None · Indication-specific · 40 mg/d · 10 mg/d · 20 mg/d · 80 mg/d · 10 mg/d (adults) · 100 mg/d · 4 g/d · 400 mg/d · 40 mg/d typical; up to 240 mg/d for Zollinger-Ellison · 5 mg/d · 50 mg/d · 600 mg/d · No fixed ceiling; titrate to clinical effect and tolerability with CDC opioid prescribing guidance constraints on morphine-milligram-equivalent (MME) totals · No fixed maximum; titrated to TSH target · TID per eye · Titrated to glucose; no fixed ceiling · Titrated to glucose; no fixed maximum · '''20 mg/day in adults >60 years''' per FDA's 2011-2012 QT-prolongation warning; 40 mg/day in adults ≤60

Other values:

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None · Oral · IV · Topical · IM · intranasal · rectal · Subcutaneous · topical ophthalmic · ophthalmic · intramuscular · intravenous · transdermal · vaginal · Subcutaneous (abdomen · sublingual · thigh · Inhaled · SC · intra-articular

Other values:

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2-3 hours per dose; full acid suppression after 3-5 days (1) · Acid suppression within hours; full effect after 3-5 days of dosing (1) · Symptom relief within 24-48 hours (1)

24+ hours (irreversible enzyme binding) (1) · 24-72 hours per dose (irreversible enzyme binding) (1) · 8 hours per dose (1)

~1 hour (plasma); pharmacodynamic effect persists 24+ hours'"`UNIQ--ref-0000011D-QINU`"' (1) · ~1.5 hours (plasma); pharmacodynamic effect 24+ hours via target turnover'"`UNIQ--ref-000008E8-QINU`"' (1) · ~3 hours (acyclovir, the active metabolite); longer in renal impairment'"`UNIQ--ref-000005D6-QINU`"' (1)

~55% bioavailability of acyclovir after valacyclovir oral (vs ~20% from oral acyclovir directly)'"`UNIQ--ref-000005D7-QINU`"' (1) · ~64-90% (oral; increases at higher doses and with multi-day dosing)'"`UNIQ--ref-000008E9-QINU`"' (1) · ~77% (oral; not affected by food or antacids)'"`UNIQ--ref-0000011E-QINU`"' (1)

Generally considered safe; widely used in obstetric reflux.<sup class="pcp-cn" title="This claim needs a citation.">&#91;[[Pharmacopedia:Citation needed|citation&nbsp;needed]]&#93;</sup> (1) · Widely used in obstetric reflux; reassuring data.<sup class="pcp-cn" title="This claim needs a citation.">&#91;[[Pharmacopedia:Citation needed|citation&nbsp;needed]]&#93;</sup> (1) · Widely used in pregnancy when antiviral indicated; reassuring registry data.<sup class="pcp-cn" title="This claim needs a citation.">&#91;[[Pharmacopedia:Citation needed|citation&nbsp;needed]]&#93;</sup> (1)

OTC (20 mg, 14-day course) and [[USLegal:Prescription only|Rx-only]] (higher and longer durations) in US (1) · [[USLegal:Prescription only|Rx-only]] in US (2)