Drilldown: Medicines

Acetaminophen (paracetamol, APAP) (1) · Dexmethylphenidate (1) · Sildenafil (1)

Focalin, Focalin XR (1) · Tylenol, Panadol (international), Ofirmev (IV); huge OTC presence (1) · Viagra, Revatio (1)

CNS stimulant (1) · NDRI (1) · PDE5 Inhibitor (1) · Psychostimulant (1) · [[:Category:Analgesics|Non-opioid analgesic]] (1) · [[:Category:Antipyretics|Antipyretic]] (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-0000001F-QINU`"', '"`UNIQ--vote-00000020-QINU`"', '"`UNIQ--vote-00000021-QINU`"' (1) · '"`UNIQ--vote-00000150-QINU`"', '"`UNIQ--vote-00000151-QINU`"' (1) · '"`UNIQ--vote-00000705-QINU`"', '"`UNIQ--vote-00000706-QINU`"' (1)

None (1) · 325-1000 mg PO every 4-6 hours as needed; maximum 4 g/d in healthy adults, 3 g/d in regular users or hepatic risk; pediatric 10-15 mg/kg every 4-6 hours (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) · 325, 500, 650 mg tablets; 80, 160 mg chewables; 160 mg/5 mL pediatric liquid; 325 mg suppository; 1000 mg/100 mL IV (Ofirmev); fixed-dose combinations with opioids, decongestants, antihistamines (1)

None (1) · 100 mg/d (ED); 20 mg TID (PAH) (1) · 4 g/d in healthy adults; 3 g/d conservative limit; 2 g/d in cirrhosis or chronic alcohol use (1)

IV (1) · IV (Revatio) (1) · Oral (3) · rectal (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:

Search

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

1-3 hours (normal liver); markedly prolonged in overdose with glutathione depletion'"`UNIQ--ref-00000022-QINU`"' (1) · 2.2 h (IR parent); ~3 h (XR parent) (1) · ~4 h (1)

~22–25% (1) · ~40% (1) · ~85-98% (oral)'"`UNIQ--ref-00000023-QINU`"' (1)

Category B (1) · Category C (1) · Long the preferred analgesic-antipyretic in pregnancy; recent observational studies have raised speculative neurodevelopmental signals that remain under investigation.<sup class="pcp-cn" title="This claim needs a citation.">&#91;[[Pharmacopedia:Citation needed|citation&nbsp;needed]]&#93;</sup> (1)

OTC and [[USLegal:Prescription only|Rx-only]] (IV, combination products) in US (1) · Rx-only in US (1) · Schedule II (1)