Drilldown: Medicines

Azithromycin (1) · Dexmethylphenidate (1) · Fluconazole (1) · Primidone (1) · Sildenafil (1)

Diflucan (1) · Focalin, Focalin XR (1) · Mysoline (1) · Viagra, Revatio (1) · Zithromax, Z-Pak, Zmax (1)

CNS stimulant (1) · NDRI (1) · PDE5 Inhibitor (1) · Psychostimulant (1) · [[:Category:Anticonvulsants|Anticonvulsant]] (1) · [[:Category:Antifungals|Antifungal (triazole)]] (1) · [[:Category:Azalides|Azalide]] (1) · [[:Category:Barbiturates|Barbiturate (parent compound)]] (1) · [[:Category:Macrolide_antibiotics|Macrolide antibiotic]] (1) · [[:Category:Tremor medicines|Tremor medicine]] (1) · [[:Category:Triazoles|Triazole]] (1)

None (2) · 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-00000013-QINU`"' Strong CYP3A4 induction via the phenobarbital metabolite produces many interactions (reduces oral contraceptives, warfarin, many psychotropics). Essential-tremor efficacy is the unique pharmacological selling point'"`UNIQ--ref-00000014-QINU`"'. (1)

'"`UNIQ--vote-00000015-QINU`"', '"`UNIQ--vote-00000016-QINU`"' (1) · '"`UNIQ--vote-00000150-QINU`"', '"`UNIQ--vote-00000151-QINU`"' (1) · '"`UNIQ--vote-000003F6-QINU`"', '"`UNIQ--vote-000003F7-QINU`"', '"`UNIQ--vote-000003F8-QINU`"', '"`UNIQ--vote-000003F9-QINU`"', '"`UNIQ--vote-000003FA-QINU`"', '"`UNIQ--vote-000003FB-QINU`"' (1) · '"`UNIQ--vote-00000705-QINU`"', '"`UNIQ--vote-00000706-QINU`"' (1) · '"`UNIQ--vote-00000A42-QINU`"', '"`UNIQ--vote-00000A43-QINU`"', '"`UNIQ--vote-00000A44-QINU`"', '"`UNIQ--vote-00000A45-QINU`"', '"`UNIQ--vote-00000A46-QINU`"' (1)

None (1) · 50 mg ~1 h before sexual activity (ED); 20 mg TID (PAH) (1) · 500 mg PO day 1, then 250 mg PO daily days 2-5 (Z-Pak); 1 g PO single dose for chlamydia; pediatric dosing 10 mg/kg day 1, 5 mg/kg days 2-5 (1) · Seizures: 100-125 mg PO at bedtime x 3 days, then BID, then TID, escalating to 750-1500 mg/day. Essential tremor: 25-50 mg PO at bedtime, titrate slowly to 250-750 mg/day (1) · Vulvovaginal: 150 mg PO single dose; oropharyngeal: 200 mg PO day 1, then 100 mg daily ×14 days; invasive candidiasis: 800 mg load, then 400 mg PO/IV daily; cryptococcal meningitis: 400-800 mg/d (1)

None (1) · 25, 50, 100 mg tabs (Viagra); 20 mg tabs and 10 mg/mL oral suspension (Revatio) (1) · 250 mg, 500 mg, 600 mg tablets; 100, 200 mg/5 mL suspension; 2 g ER suspension (Zmax); 500 mg IV (1) · 50, 100, 150, 200 mg tablets; 10, 40 mg/mL oral suspension; 2 mg/mL IV (1) · Tablets 50, 250 mg (1)

None (1) · 100 mg/d (ED); 20 mg TID (PAH) (1) · 2 g/day (seizures); typically much lower for essential tremor (1) · 500 mg/d (typical regimen); single 2 g for Zmax; 2 g for select STIs (1) · 800 mg/d (severe invasive disease) (1)

IV (2) · IV (Revatio) (1) · Oral (5)

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

24 hours (1) · BID-TID dosing (1) · IR 4–6 h; XR 8–12 h (1) · Tissue half-life supports once-daily and post-treatment effect (1) · ~4 h (1)

2.2 h (IR parent); ~3 h (XR parent) (1) · Primidone 5-15 hours; '''phenobarbital active metabolite 50-150 hours'''; PEMA (phenylethylmalonamide) active metabolite 16 hours'"`UNIQ--ref-00000017-QINU`"' (1) · ~30 hours (long, supports once-daily dosing and substantial drug-interaction window after discontinuation)'"`UNIQ--ref-00000A47-QINU`"' (1) · ~4 h (1) · ~68 hours (terminal; reflects deep tissue accumulation, much longer than plasma)'"`UNIQ--ref-000003FC-QINU`"' (1)

>90% (oral; not affected by food or gastric pH — a major practical advantage over itraconazole)'"`UNIQ--ref-00000A48-QINU`"' (1) · ~22–25% (1) · ~37% (oral; food reduces absorption modestly)'"`UNIQ--ref-000003FD-QINU`"' (1) · ~40% (1) · ~90% (oral)'"`UNIQ--ref-00000018-QINU`"' (1)

None (1) · Category B (1) · Category C (1) · Generally considered safe; commonly used in pregnancy when macrolide indicated.<sup class="pcp-cn" title="This claim needs a citation.">&#91;[[Pharmacopedia:Citation needed|citation&nbsp;needed]]&#93;</sup> (1) · Substantial teratogenic signal (barbiturate class effects including neonatal withdrawal and hemorrhagic disease of newborn).<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:Prescription only|Rx-only]] in US (2) · [[USLegal:Prescription only|Rx-only]] in US. '''Federally non-controlled despite being a barbiturate''', a paradoxical situation given that its primary active metabolite phenobarbital is Schedule IV'"`UNIQ--ref-00000019-QINU`"' (1)