Drilldown: Medicines

Famotidine (1) · Hydrochlorothiazide (1) · Melatonin (N-acetyl-5-methoxytryptamine) (1)

Microzide; mostly prescribed generically (1) · Multiple OTC dietary supplement formulations (1) · Pepcid, Pepcid AC, Pepcid Complete (1)

[[:Category:Antihypertensives|Antihypertensive]] (1) · [[:Category:Antisecretory_agents|Gastric acid suppressant]] (1) · [[:Category:Chronobiotics|Chronobiotic (circadian phase regulator)]] (1) · [[:Category:H2_receptor_antagonists|Histamine H2 receptor antagonist]] (1) · [[:Category:Melatonin receptor agonists|Melatonin receptor agonist]] (1) · [[:Category:Sleep aids|Sleep aid]] (1) · [[:Category:Thiazide_diuretics|Thiazide diuretic]] (1)

None (1) · '"`UNIQ--vote-00000138-QINU`"' Decreases urinary calcium (used in stone prevention); raises serum uric acid, glucose, and lipids modestly; non-anion-gap hypokalemic metabolic alkalosis is the characteristic electrolyte pattern'"`UNIQ--ref-00000139-QINU`"'. (1) · '"`UNIQ--vote-00000255-QINU`"' Less potent and shorter-acting than PPIs but with faster on-effect; suitable for on-demand acid suppression. Largely renally cleared; dose-adjust in renal impairment to avoid CNS effects (confusion in elderly)'"`UNIQ--ref-00000256-QINU`"'. (1)

'"`UNIQ--vote-0000001B-QINU`"', '"`UNIQ--vote-0000001C-QINU`"', '"`UNIQ--vote-0000001D-QINU`"', '"`UNIQ--vote-0000001E-QINU`"', '"`UNIQ--vote-0000001F-QINU`"', '"`UNIQ--vote-00000020-QINU`"' (1) · '"`UNIQ--vote-0000013A-QINU`"', '"`UNIQ--vote-0000013B-QINU`"', '"`UNIQ--vote-0000013C-QINU`"', '"`UNIQ--vote-0000013D-QINU`"' (1) · '"`UNIQ--vote-00000257-QINU`"', '"`UNIQ--vote-00000258-QINU`"', '"`UNIQ--vote-00000259-QINU`"', '"`UNIQ--vote-0000025A-QINU`"' (1)

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 (1) · 12.5-25 mg PO once daily (1) · 20 mg PO twice daily, or 40 mg at bedtime (1)

10 mg, 20 mg, 40 mg tablets; chewables; 40 mg/5 mL oral suspension; 10 mg/mL IV (1) · 12.5 mg capsules; 12.5, 25, 50 mg tablets (1) · OTC tablets, sublingual tablets, gummies, liquid, extended-release tablets and capsules; common strengths 0.5, 1, 3, 5, 10 mg (1)

160 mg/d (Zollinger-Ellison); 80 mg/d for routine indications (1) · 50 mg/d (hypertension); up to 200 mg/d (edema) (1) · Not formally established (dietary supplement); doses above ~3-5 mg show no additional efficacy but increase next-day sedation risk (1)

IV (1) · Oral (3) · sublingual (1)

1 hour PO; minutes IV (1) · 30-60 minutes (immediate-release oral) (1) · Diuresis at 2 hours; antihypertensive effect within days, max at 3-4 weeks (1)

None · 24 hours · 4-6 hours · 12 hours · 6-8 hours · Daily dosing · 8-12 hours · 12-24 hours · Hours · Hours per application · 24 hours (HS dosing) · 24 hours (once-daily dosing) · 24 h · N/A · N/A (replacement) · Variable · ~7-8 hours · 3-5 hours · 4-6 hours (IR); 24 hours (ER) · 6-12 hours

Other values:

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2.5-3.5 hours; longer in renal impairment'"`UNIQ--ref-0000025B-QINU`"' (1) · 30-50 minutes (short)'"`UNIQ--ref-00000021-QINU`"' (1) · 6-15 hours'"`UNIQ--ref-0000013E-QINU`"' (1)

40-45% (oral; not significantly affected by food)'"`UNIQ--ref-0000025C-QINU`"' (1) · 65-75% (oral)'"`UNIQ--ref-0000013F-QINU`"' (1) · ~15% (oral; highly variable due to extensive and variable first-pass metabolism)'"`UNIQ--ref-00000022-QINU`"' (1)

None (1) · Generally considered safe; widely used. Cleared in lactation at low levels.<sup class="pcp-cn" title="This claim needs a citation.">&#91;[[Pharmacopedia:Citation needed|citation&nbsp;needed]]&#93;</sup> (1) · Limited human data; endogenous hormone, but supplemental pharmacological doses are not well characterized in pregnancy.<sup class="pcp-cn" title="This claim needs a citation.">&#91;[[Pharmacopedia:Citation needed|citation&nbsp;needed]]&#93;</sup> (1)

OTC (10-20 mg) and [[USLegal:Prescription only|Rx-only]] (higher doses) in US (1) · [[USLegal:Over-the-counter|OTC]] dietary supplement in the US ('''not FDA-regulated as a medicine'''; multiple studies show OTC products contain 50-470% of labeled melatonin content); [[USLegal:Prescription only|Rx-only]] in the EU and UK (1) · [[USLegal:Prescription only|Rx-only]] in US (1)