Drilldown: Medicines

Dexmethylphenidate (1) · Melatonin (N-acetyl-5-methoxytryptamine) (1) · Sildenafil (1)

Focalin, Focalin XR (1) · Multiple OTC dietary supplement formulations (1) · Viagra, Revatio (1)

CNS stimulant (1) · NDRI (1) · PDE5 Inhibitor (1) · Psychostimulant (1) · [[:Category:Chronobiotics|Chronobiotic (circadian phase regulator)]] (1) · [[:Category:Melatonin receptor agonists|Melatonin receptor agonist]] (1) · [[:Category:Sleep aids|Sleep aid]] (1)

None (1) · Norepinephrine–dopamine reuptake inhibition (DAT, NET), d-threo enantiomer of methylphenidate (1) · Selective inhibitor of phosphodiesterase type 5 (PDE5), preventing cGMP breakdown in vascular smooth muscle. In the corpus cavernosum, potentiates the NO/cGMP cascade triggered by sexual stimulation. (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-00000150-QINU`"', '"`UNIQ--vote-00000151-QINU`"' (1) · '"`UNIQ--vote-00000705-QINU`"', '"`UNIQ--vote-00000706-QINU`"' (1)

None (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) · 50 mg ~1 h before sexual activity (ED); 20 mg TID (PAH) (1)

None (1) · 25, 50, 100 mg tabs (Viagra); 20 mg tabs and 10 mg/mL oral suspension (Revatio) (1) · OTC tablets, sublingual tablets, gummies, liquid, extended-release tablets and capsules; common strengths 0.5, 1, 3, 5, 10 mg (1)

None (1) · 100 mg/d (ED); 20 mg TID (PAH) (1) · Not formally established (dietary supplement); doses above ~3-5 mg show no additional efficacy but increase next-day sedation risk (1)

IV (Revatio) (1) · Oral (3) · sublingual (1)

None · Hours · 30-60 minutes · 1-2 hours · ~30 min · LDL lowering at 2 weeks, max by 4 weeks · ~1 hour · 15-30 minutes · 15–30 min · 1–2 h · 30–60 min · Antidepressant effect emerges over 1-2 weeks · BP and symptomatic LUTS improvement within 1-2 weeks · BP effect within 1-2 weeks · Clinical improvement within 24-72 hours · Days · Motor improvement over days at therapeutic dose · Over weeks · Postprandial glucose effect within days; HbA1c by 12 weeks · Sleep effect from first dose; antidepressant effect over 1-4 weeks

Other values:

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3-4 hours (1) · IR 4–6 h; XR 8–12 h (1) · ~4 h (1)

2.2 h (IR parent); ~3 h (XR parent) (1) · 30-50 minutes (short)'"`UNIQ--ref-00000021-QINU`"' (1) · ~4 h (1)

~15% (oral; highly variable due to extensive and variable first-pass metabolism)'"`UNIQ--ref-00000022-QINU`"' (1) · ~22–25% (1) · ~40% (1)

Category B (1) · Category C (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)

Rx-only in US (1) · Schedule II (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)