Drilldown: Medicines

Brimonidine (1) · Dorzolamide (1) · Primidone (1)

Alphagan P (ophthalmic glaucoma), Mirvaso (topical rosacea) (1) · Mysoline (1) · Trusopt; with timolol as Cosopt (1)

[[:Category:Alpha-2_agonists|Alpha-2 adrenergic agonist]] (1) · [[:Category:Anticonvulsants|Anticonvulsant]] (1) · [[:Category:Barbiturates|Barbiturate (parent compound)]] (1) · [[:Category:Carbonic_anhydrase_inhibitors|Carbonic anhydrase inhibitor (topical)]] (1) · [[:Category:Glaucoma_medications|Glaucoma medication]] (2) · [[:Category:Ocular_hypotensive_agents|Ocular hypotensive agent]] (2) · [[: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)

'"`UNIQ--vote-00000015-QINU`"', '"`UNIQ--vote-00000016-QINU`"' (1) · '"`UNIQ--vote-00000B08-QINU`"', '"`UNIQ--vote-00000B09-QINU`"' (1) · '"`UNIQ--vote-000010CE-QINU`"', '"`UNIQ--vote-000010CF-QINU`"', '"`UNIQ--vote-000010D0-QINU`"' (1)

1 drop in affected eye(s) TID (monotherapy); BID with timolol (Cosopt) (1) · Ophthalmic 1 drop in affected eye(s) TID; topical Mirvaso 0.33% gel applied to face daily (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)

0.1%, 0.15%, 0.2% ophthalmic solutions; 0.33% topical gel; combinations with timolol (Combigan) and brinzolamide (Simbrinza) (1) · 2% ophthalmic solution (Trusopt); 2%/0.5% fixed combination with timolol (Cosopt, Cosopt PF) (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 (1) · Topical ophthalmic (2) · topical skin (1)

Anticonvulsant effect emerges with slow titration over weeks; tremor effect over weeks (1) · IOP lowering at 1 hour; max at 2-3 hours (1) · IOP lowering at 2 hours; max at 4 hours (1)

8-12 hours (1) · 8-12 hours (TID dosing needed) (1) · BID-TID dosing (1)

Primidone 5-15 hours; '''phenobarbital active metabolite 50-150 hours'''; PEMA (phenylethylmalonamide) active metabolite 16 hours'"`UNIQ--ref-00000017-QINU`"' (1) · ~3 hours'"`UNIQ--ref-000010D1-QINU`"' (1) · ~4 months in erythrocytes (carbonic anhydrase binding in red cells; not relevant to topical IOP duration)'"`UNIQ--ref-00000B0A-QINU`"' (1)

Topical with measurable systemic absorption (small CA inhibition observed clinically with chronic use)'"`UNIQ--ref-00000B0B-QINU`"' (1) · Topical; clinically meaningful systemic absorption can produce systemic α2 effects (somnolence, hypotension), especially in children'"`UNIQ--ref-000010D2-QINU`"' (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; weigh against alternatives.<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)

[[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)