Drilldown: Medicines

Bisoprolol (1) · Memantine ER / Donepezil (1) · Nebivolol (1) · Phencyclidine (1)

Bystolic (1) · Namzaric (1) · Sernyl (human, withdrawn 1965); Sernylan (veterinary, withdrawn 1978) (1) · Zebeta (1)

Beta Blocker (2) · Cardioselective (β1) (1) · Cardioselective (β1) + vasodilator (1) · Combined cholinesterase inhibitor + NMDA antagonist (1) · [[:Category:Anesthetics|Anesthetic (historical)]] (1) · [[:Category:Arylcyclohexylamines|Arylcyclohexylamine]] (1) · [[:Category:Dissociatives|Dissociative]] (1) · [[:Category:NMDA_receptor_antagonists|NMDA receptor antagonist]] (1) · [[:Category:Sigma-1_receptor_agonists|Sigma-1 receptor agonist]] (1)

None (1) · Donepezil: reversible AChE inhibitor, increases synaptic acetylcholine. Memantine: uncompetitive low-affinity NMDA receptor antagonist, dampens pathological glutamate overactivation while preserving normal synaptic signaling. Targets two distinct mechanisms in Alzheimer's. (1) · Highly β1-selective adrenergic antagonist. Greater selectivity than metoprolol or atenolol. (1) · The d-enantiomer is a highly β1-selective antagonist; the l-enantiomer triggers endothelial nitric-oxide–mediated vasodilation. Unique among beta blockers for this NO mechanism. (1)

'"`UNIQ--vote-00000063-QINU`"', '"`UNIQ--vote-00000064-QINU`"' (1) · '"`UNIQ--vote-00000468-QINU`"' (1) · '"`UNIQ--vote-0000059D-QINU`"' (1) · '"`UNIQ--vote-00000636-QINU`"', '"`UNIQ--vote-00000637-QINU`"', '"`UNIQ--vote-00000638-QINU`"' (1)

2.5–5 mg daily (HTN); 1.25 mg daily (HFrEF, slow titration) (1) · 5 mg daily (1) · For patients already stable on memantine 28 mg/d + donepezil 10 mg/d, switch to one capsule daily of equivalent strength (1) · No current medical indication. Historical anesthetic dose 0.25 mg/kg IV (Sernyl). (1)

2.5, 5, 10, 20 mg tabs (1) · 5, 10 mg tabs (1) · 7/10, 14/10, 21/10, 28/10 mg ER capsules (memantine ER / donepezil) (1) · Historical: Sernyl 25 mg tablets, 10 mg/mL injection (human); Sernylan 100 mg/mL injection (veterinary). Illicit: white crystalline powder, oily liquid, "dipped" cigarettes ("wet"), tablets. (1)

20 mg/d (1) · 28/10 mg/d (1) · 40 mg/d (1) · N/A (no current medical indication) (1)

IM (1) · insufflated (1) · IV (1) · Oral (3) · Oral (capsule whole or opened/sprinkled on applesauce) (1) · smoked (1)

1–2 h (2) · Component effects accumulate over weeks (1) · Smoked 2-5 min; insufflated 5-15 min; oral 30-60 min; IV / IM ~5-15 min (1)

None · 24 hours · 4-6 hours · 12 hours · 6-8 hours · Daily dosing · 8-12 hours · 12-24 hours · Hours · Hours per application · 24 hours (HS dosing) · 24 hours (once-daily dosing) · 24 h · N/A · N/A (replacement) · Variable · ~7-8 hours · 3-5 hours · 4-6 hours (IR); 24 hours (ER) · 6-12 hours

Other values:

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9–12 h (1) · Highly variable, 7-46 hours (mean ~21 h); lipophilic deposition in fat with delayed re-release contributes to wide range'"`UNIQ--ref-00000065-QINU`"' (1) · ~10 h (CYP2D6 extensive metabolizers); up to 31 h (poor metabolizers) (1) · ~60–80 h (memantine); ~70 h (donepezil) (1)

~100% both components (1) · ~12% (extensive metabolizers); ~96% (poor metabolizers) (1) · ~72% oral; ~85% smoked'"`UNIQ--ref-00000066-QINU`"' (1) · ~90% (low first-pass) (1)

None (1) · Category C (2) · Not relevant (geriatric problem) (1)

Rx-only in US (3) · [[USLegal:DEA Schedule II|Schedule II]] controlled substance in US (rescheduled from Schedule III in 1978). No accepted medical use. UN Convention on Psychotropic Substances Schedule II internationally.'"`UNIQ--ref-00000067-QINU`"' (1)