Drilldown: Medicines

None (1) · Mirabegron (1) · Primidone (1)

Myrbetriq (1) · Mysoline (1) · Quviviq (1)

Dual orexin receptor antagonist (DORA) (1) · [[:Category:Anticonvulsants|Anticonvulsant]] (1) · [[:Category:Barbiturates|Barbiturate (parent compound)]] (1) · [[:Category:Beta-3_agonists|β3 adrenergic agonist]] (1) · [[:Category:Overactive_bladder_medications|Overactive bladder medication]] (1) · [[:Category:Tremor medicines|Tremor medicine]] (1)

None (2) · '"`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)

Insomnia (sleep onset and/or sleep maintenance) in adults (FDA-approved Jan 2022) (1) · '"`UNIQ--vote-00000015-QINU`"', '"`UNIQ--vote-00000016-QINU`"' (1) · '"`UNIQ--vote-00000C4C-QINU`"', '"`UNIQ--vote-00000C4D-QINU`"' (1)

25 mg PO at bedtime (no titration); may increase to 50 mg if 25 mg inadequate (1) · 25 mg PO once daily; titrate to 50 mg after 4-8 weeks if needed (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)

25 mg, 50 mg tablets (1) · 25, 50 mg ER tablets; 8 mg/mL granules for oral suspension (Myrbetriq Granules, pediatric) (1) · Tablets 50, 250 mg (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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Oral (3)

Anticonvulsant effect emerges with slow titration over weeks; tremor effect over weeks (1) · Symptom improvement within weeks (1) · ~30 min (1)

24 hours (1) · BID-TID dosing (1) · ~7-8 hours (1)

Primidone 5-15 hours; '''phenobarbital active metabolite 50-150 hours'''; PEMA (phenylethylmalonamide) active metabolite 16 hours'"`UNIQ--ref-00000017-QINU`"' (1) · ~50 hours'"`UNIQ--ref-00000C4E-QINU`"' (1) · ~8 hours (shorter than suvorexant and lemborexant) (1)

25 mg: ~29%; 50 mg: ~35%; food reduces absorption'"`UNIQ--ref-00000C4F-QINU`"' (1) · ~62% (1) · ~90% (oral)'"`UNIQ--ref-00000018-QINU`"' (1)

Limited data.<sup class="pcp-cn" title="This claim needs a citation.">&#91;[[Pharmacopedia:Citation needed|citation&nbsp;needed]]&#93;</sup> (1) · Limited data; avoid (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, Schedule IV (US) (1) · [[USLegal:Prescription only|Rx-only]] in US (1) · [[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)