Drilldown: Medicines

Dextromethorphan / Quinidine (1) · Doxycycline (1) · Ofloxacin (1)

Floxin (oral, US brand discontinued); Ocuflox (ophthalmic); Floxin Otic (otic) (1) · Nuedexta (1) · Vibramycin, Doryx, Oracea, Adoxa, Monodox, Acticlate (1)

None (1) · [[:Category:Antibacterials|Antibacterial]] (1) · [[:Category:Bacteriostatic_antibiotics|Bacteriostatic antibiotic]] (1) · [[:Category:Fluoroquinolones|Fluoroquinolone antibiotic]] (1) · [[:Category:Tetracycline_antibiotics|Tetracycline antibiotic]] (1)

None (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)

'"`UNIQ--vote-00000475-QINU`"', '"`UNIQ--vote-00000476-QINU`"', '"`UNIQ--vote-00000477-QINU`"', '"`UNIQ--vote-00000478-QINU`"', '"`UNIQ--vote-00000479-QINU`"', '"`UNIQ--vote-0000047A-QINU`"', '"`UNIQ--vote-0000047B-QINU`"', '"`UNIQ--vote-0000047C-QINU`"' (1) · '"`UNIQ--vote-000014BE-QINU`"', '"`UNIQ--vote-000014BF-QINU`"', '"`UNIQ--vote-000014C0-QINU`"', '"`UNIQ--vote-000014C1-QINU`"', '"`UNIQ--vote-000014C2-QINU`"' (1) · '"`UNIQ--vote-00001582-QINU`"' (1)

1 capsule (20/10 mg dextromethorphan/quinidine) PO once daily × 7 days, then 1 capsule BID (1) · 100 mg PO BID; rickettsial 200 mg/d; doxy-PEP 200 mg within 72 hours after condomless sex (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)

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) · 50 mg, 75 mg, 100 mg, 150 mg tablets and capsules; delayed-release; suspension; IV (1)

1 capsule BID (40 mg DXM / 20 mg quinidine per day) (1) · 800 mg/d (1) · ~200 mg/d for most indications; higher doses for severe infections (1)

IV (1) · ophthalmic (1) · Oral (3) · otic (1)

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:

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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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16-22 hours'"`UNIQ--ref-0000047D-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) · ~9 hours'"`UNIQ--ref-000014C3-QINU`"' (1)

Increased substantially via CYP2D6 inhibition'"`UNIQ--ref-00001584-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)

None (1) · '''Avoid in pregnancy where alternatives exist''' (animal cartilage toxicity; class-wide concern).<sup class="pcp-cn" title="This claim needs a citation.">&#91;[[Pharmacopedia:Citation needed|citation&nbsp;needed]]&#93;</sup> (1) · Limited data; quinidine has been used in pregnancy as antiarrhythmic.<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 (1) · [[USLegal:Prescription only|Rx-only]] in US. Carries the same fluoroquinolone-class '''Boxed Warnings''' as ciprofloxacin/levofloxacin'"`UNIQ--ref-000014C5-QINU`"' (1) · [[USLegal:Prescription only|Rx-only]] in US. Caution with QT-prolonging medicines (quinidine itself is class IA antiarrhythmic, and the dose here, though sub-antiarrhythmic, still contributes to QT)'"`UNIQ--ref-00001585-QINU`"' (1)