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Apixaban (1) · Azelastine (1) · Cephalexin (1) · Clindamycin (1) · Cyproheptadine (hydrochloride) (1) · Dextromethorphan / Quinidine (1) · Doxycycline (1) · Erythromycin (1) · Flecainide (1) · Fluoxetine (1) · Icosapent ethyl (eicosapentaenoic acid ethyl ester, EPA-EE) (1) · Lorazepam (1) · Ofloxacin (1) · Oseltamivir (1) · Penicillin V (phenoxymethylpenicillin) (1) · Phenazopyridine (1) · Ticagrelor (1) · Torsemide (1)

Astelin, Astepro (intranasal); Optivar (ophthalmic); with fluticasone as Dymista (1) · Ativan (oral, injectable), Loreev XR (1) · Brilinta (1) · Cleocin (oral, IV); Clindesse, Cleocin (vaginal); Clindets, Cleocin T (topical) (1) · Demadex, Soaanz (1) · E.E.S., EryPed, Ery-Tab, PCE, Erythrocin (lactobionate IV); topical Erygel, Akne-Mycin; ophthalmic ointment (1) · Eliquis (1) · Floxin (oral, US brand discontinued); Ocuflox (ophthalmic); Floxin Otic (otic) (1) · Keflex, Daxbia, Panixine; mostly prescribed generically (1) · Nuedexta (1) · Pen-V, Veetids (mostly generic) (1) · Periactin (US brand discontinued; generic widely available) (1) · Prozac (1) · Pyridium (Rx), Azo Standard, AZO Urinary Pain Relief (OTC) (1) · Tambocor (US brand discontinued) (1) · Tamiflu (1) · Vascepa (1) · Vibramycin, Doryx, Oracea, Adoxa, Monodox, Acticlate (1)

None (10) · TrkB/BDNF'"`UNIQ--ref-00000040-QINU`"' '"`UNIQ--vote-00000041-QINU`"' (1) · '"`UNIQ--vote-00000017-QINU`"' Anticholinergic and sedating, with the standard first-generation antihistamine Beers-list concerns in elderly patients'"`UNIQ--ref-00000018-QINU`"'. (1) · '"`UNIQ--vote-000001F6-QINU`"' CYP3A4 (primary) and P-glycoprotein substrate; strong dual inhibitors or inducers materially shift exposure. Reversal: andexanet alfa for life-threatening bleeding; 4F-PCC commonly used off-label when andexanet unavailable'"`UNIQ--ref-000001F7-QINU`"'. (1) · '"`UNIQ--vote-00000B40-QINU`"' The TRANSFORM-HF trial (2023) found no all-cause mortality difference between torsemide and furosemide in heart failure, although torsemide remains pharmacologically preferred where furosemide oral absorption is unreliable'"`UNIQ--ref-00000B41-QINU`"'. (1) · '"`UNIQ--vote-0000113A-QINU`"' Concomitant β-blocker or CCB is required when used for AF to prevent 1:1 atrial flutter conduction (flecainide can slow atrial rate to a level where AV conduction allows dangerous ventricular rates). CYP2D6 substrate'"`UNIQ--ref-0000113B-QINU`"'. (1) · '"`UNIQ--vote-000013B1-QINU`"' Topical application minimizes systemic antihistaminic burden; the characteristic bitter taste with nasal use (drainage to oropharynx) is the main tolerability issue'"`UNIQ--ref-000013B2-QINU`"'. (1) · '"`UNIQ--vote-000014BC-QINU`"' Topical ophthalmic and otic formulations remain widely used in ENT and ophthalmology. Subject to all fluoroquinolone-class restrictions (tendinitis/rupture, peripheral neuropathy, QT prolongation)'"`UNIQ--ref-000014BD-QINU`"'. (1) · '"`UNIQ--vote-00001580-QINU`"' First FDA-approved treatment for PBA. The 10 mg quinidine daily dose is far below antiarrhythmic levels but sufficient to nearly fully inhibit CYP2D6, the basis of the combination's pharmacokinetic rationale'"`UNIQ--ref-00001581-QINU`"'. (1)

1 capsule (20/10 mg dextromethorphan/quinidine) PO once daily × 7 days, then 1 capsule BID (1) · 10 mg (1) · 10-20 mg PO/IV once daily; titrate by clinical response. 1:1 IV to PO conversion (unlike furosemide's 1:2) (1) · 100 mg PO BID; rickettsial 200 mg/d; doxy-PEP 200 mg within 72 hours after condomless sex (1) · 100-200 mg PO TID after meals × no more than 2 days when used with concurrent antibiotic (1) · 2 g PO BID with meals (4 g/d total) (1) · 250-500 mg PO every 6-8 hours (1) · 250-500 mg PO QID; 7.5-12.5 mg/kg IV q6h; topical and ophthalmic per formulation (1) · 50 mg PO BID; titrate to 100-200 mg BID; pill-in-pocket 200-300 mg PO single dose for AF conversion (1) · 500 mg PO every 6 hours, or 250 mg every 6 hours for mild infections (1) · ACS/PCI: 180 mg PO loading dose, then 90 mg PO BID for 12 months; long-term post-MI: 60 mg BID (1) · Allergy: 4 mg PO TID. Serotonin syndrome: 12 mg loading dose PO or by nasogastric tube, then 2 mg every 2 hours until clinical improvement. Appetite stimulation: 2-4 mg PO TID-QID (1) · Anxiety: 0.5-1 mg PO BID-TID. Insomnia: 1-2 mg PO at bedtime. Status epilepticus: 4 mg IV (adult), repeat after 5-10 minutes if needed. Acute agitation: 1-2 mg IM (1) · Intranasal 0.1% or 0.15%: 1-2 sprays/nostril BID; ophthalmic 0.05%: 1 drop in each eye BID (1) · NVAF: 5 mg PO BID (2.5 mg BID if 2 of 3: age ≥80, weight ≤60 kg, serum creatinine ≥1.5 mg/dL); acute VTE: 10 mg BID for 7 days, then 5 mg BID (1) · Oral 200-400 mg BID; ophthalmic 1-2 drops in affected eye(s) q2-4h initially, then taper; otic 5-10 drops in affected ear BID (1) · Oral 300-450 mg PO QID; IV 600-900 mg q8h; topical 1% solution/gel BID; vaginal 100 mg ovule × 3 days or 2% cream × 7 days (1) · Treatment: 75 mg PO BID × 5 days (adult); pediatric weight-based; prophylaxis: 75 mg PO once daily × 7-10 days (1)

0.1%, 0.15% intranasal spray; 0.05% ophthalmic solution; combination Dymista (azelastine 0.137 mg + fluticasone 50 mcg/spray) (1) · 0.5 g, 1 g capsules (1) · 10 mg, 20 mg, 40 mg caps (1) · 2.5 mg, 5 mg tablets (1) · 20 mg dextromethorphan HBr / 10 mg quinidine sulfate capsules (1) · 200, 300, 400 mg tablets (mostly generic now); 0.3% ophthalmic solution; 0.3% otic solution (1) · 250 mg, 500 mg tablets; 125 mg/5 mL, 250 mg/5 mL suspension (1) · 250 mg, 500 mg, 750 mg capsules; 250 mg/5 mL, 125 mg/5 mL suspension; tablets (1) · 250, 500 mg base or stearate tablets; ER tablets; ethyl succinate 200 mg/5 mL suspension; 500 mg, 1 g IV (lactobionate); 2% topical solution/gel; 0.5% ophthalmic ointment (1) · 30, 45, 75 mg capsules; 6 mg/mL oral suspension (1) · 5, 10, 20, 100 mg tablets; 10 mg/mL IV (1) · 50 mg, 75 mg, 100 mg, 150 mg tablets and capsules; delayed-release; suspension; IV (1) · 50, 100, 150 mg tablets (1) · 60, 90 mg tablets (1) · 75, 150, 300 mg capsules; 75 mg/5 mL solution; 150 mg/mL IV; 1% topical; 2% vaginal cream (1) · 95 mg (OTC), 99.5 mg, 100 mg, 200 mg tablets (1) · Tablets 0.5, 1, 2 mg; oral concentrate 2 mg/mL; injection 2 mg/mL and 4 mg/mL; Loreev XR capsules 1, 2, 3 mg (1) · Tablets 4 mg; oral syrup 2 mg/5 mL (1)

1 capsule BID (40 mg DXM / 20 mg quinidine per day) (1) · 10 mg BID for the first 7 days of acute VTE; otherwise 5 mg BID (1) · 10 mg/day (anxiety, oral) (1) · 150 mg/d (treatment) (1) · 2 g/d typical (1) · 2 sprays/nostril BID (1) · 200 mg/d typical practical ceiling (1) · 32 mg/day adult; weight-based pediatric ceiling (1) · 4 g/d (2) · 4 g/d (rarely tolerated due to GI effects) (1) · 4.8 g/d (IV severe infection) (1) · 40 mg/d (1) · 400 mg/d (1) · 800 mg/d (1) · 90 mg BID (acute year); 60 mg BID (chronic post-MI) (1) · Limit to 48 hours of use to avoid hemolysis and methemoglobinemia (1) · ~200 mg/d for most indications; higher doses for severe infections (1)

IM (1) · intramuscular (1) · Intranasal (1) · intravenous (1) · IV (4) · ophthalmic (2) · Oral (17) · otic (1) · topical (2) · topical ophthalmic (1) · vaginal (1)

None (1) · 15 minutes (1) · 30-60 minutes (1) · 30-60 minutes (oral); 5 minutes (IV); 15-30 minutes (IM) (1) · AF conversion within hours of single PO dose (1) · Antiplatelet effect within 30 minutes of loading dose (faster than clopidogrel) (1) · Hours (6) · PBA episode reduction within 1-2 weeks (1) · Peak anticoagulant effect 3-4 hours (1) · PO 1 hour; IV 10 minutes (1) · Symptom relief within 30 minutes (1) · Symptom shortening detectable within 24-48 hours of starting (small absolute benefit; ~1 day reduction in symptom duration) (1) · Triglyceride lowering at 4-8 weeks; CV benefit emerges over months (1)

12-15 hours (intermediate); '''no active metabolites''' (key clinical feature)'"`UNIQ--ref-00000023-QINU`"' (1) · 16-22 hours'"`UNIQ--ref-0000047D-QINU`"' (1) · 1–4 days (7–15 days for norfluoxetine) (1) · 3-4 hours (similar between PO and IV due to high oral bioavailability)'"`UNIQ--ref-00000B46-QINU`"' (1) · 8-16 hours'"`UNIQ--ref-0000001E-QINU`"' (1) · Dextromethorphan substantially prolonged by quinidine's CYP2D6 inhibition (typical extensive metabolizers see ~10× higher AUC); quinidine ~6-8 hours'"`UNIQ--ref-00001583-QINU`"' (1) · ~1 hour'"`UNIQ--ref-000004F2-QINU`"' (1) · ~1.5-2 hours'"`UNIQ--ref-00000D3E-QINU`"' (1) · ~12 hours'"`UNIQ--ref-000001FB-QINU`"' (1) · ~14 hours (adults); longer in elderly and renal impairment'"`UNIQ--ref-0000113F-QINU`"' (1) · ~2.5-3 hours'"`UNIQ--ref-00001442-QINU`"' (1) · ~22 hours; longer 54 hours (desmethylazelastine, active metabolite)'"`UNIQ--ref-000013B6-QINU`"' (1) · ~30-60 minutes'"`UNIQ--ref-00000E76-QINU`"' (1) · ~6-10 hours (oseltamivir carboxylate, the active metabolite)'"`UNIQ--ref-00000E94-QINU`"' (1) · ~7 hours (parent); ~9 hours (active AR-C124910XX metabolite, accounts for ~30-40% of activity)'"`UNIQ--ref-00000C92-QINU`"' (1) · ~7-10 hours (variable; longer in renal impairment)'"`UNIQ--ref-00000FB4-QINU`"' (1) · ~89 hours (EPA, the active metabolite)'"`UNIQ--ref-000013D1-QINU`"' (1) · ~9 hours'"`UNIQ--ref-000014C3-QINU`"' (1)

70–90% (oral) (1) · 90% (oral; food delays but does not reduce absorption)'"`UNIQ--ref-000004F3-QINU`"' (1) · High (oral)'"`UNIQ--ref-00000FB5-QINU`"' (1) · Increased substantially via CYP2D6 inhibition'"`UNIQ--ref-00001584-QINU`"' (1) · Intranasal ~40% systemic; ophthalmic minimal'"`UNIQ--ref-000013B7-QINU`"' (1) · Substantially improved with high-fat meal; take with food'"`UNIQ--ref-000013D2-QINU`"' (1) · ~30-65% (oral; acid-labile, hence enteric-coated formulations; food affects absorption variably)'"`UNIQ--ref-00000D3F-QINU`"' (1) · ~36% (oral)'"`UNIQ--ref-00000C93-QINU`"' (1) · ~50% (oral; not significantly affected by food)'"`UNIQ--ref-000001FC-QINU`"' (1) · ~60% (oral; phenoxymethyl modification makes it acid-stable, unlike penicillin G which is destroyed by gastric acid)'"`UNIQ--ref-00000E77-QINU`"' (1) · ~75% (oral, as the active carboxylate after hepatic esterase activation)'"`UNIQ--ref-00000E95-QINU`"' (1) · ~80% (oral; predictable absorption — a substantive practical advantage over furosemide whose oral absorption is 10-100% variable)'"`UNIQ--ref-00000B47-QINU`"' (1) · ~90% (oral)'"`UNIQ--ref-00000024-QINU`"' (1) · ~90% (oral)'"`UNIQ--ref-00001140-QINU`"' (1) · ~90% (oral)'"`UNIQ--ref-00001443-QINU`"' (1) · ~95% (oral)'"`UNIQ--ref-0000001F-QINU`"' (1) · ~95% (oral)'"`UNIQ--ref-000014C4-QINU`"' (1) · ~95% (oral; reduced by dairy, antacids, iron via divalent-cation chelation, though less than for tetracycline itself)'"`UNIQ--ref-0000047E-QINU`"' (1)