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Clindamycin (1) · Clotrimazole (1) · Cyanocobalamin (vitamin B12) (1) · Estradiol (17β-estradiol) (1) · Folic acid (folate, pteroylglutamic acid) (1) · Medroxyprogesterone acetate (MPA) (1) · Methadone (1) · Metronidazole (1) · Nystatin (1) · Phencyclidine (1) · Progesterone (micronized) (1)

Cleocin (oral, IV); Clindesse, Cleocin (vaginal); Clindets, Cleocin T (topical) (1) · Dolophine, Methadose, Diskets (oral dispersible tablets for OTPs) (1) · Estrace, Vivelle-Dot, Climara, Divigel, Evamist, Estring, Estraderm, Premarin (CEE, not strictly estradiol) (1) · Flagyl, Metrocream, Metrogel, Metrogel-Vaginal, Noritate (1) · Folvite; mostly generic (1) · Lotrimin, Mycelex, Gyne-Lotrimin; OTC widely (1) · Many OTC and Rx; Nascobal (intranasal); generic injection (1) · Mycostatin, Nystop, Nyamyc, Bio-Statin (1) · Prometrium (oral), Endometrin (vaginal), Crinone (vaginal gel), Prochieve (1) · Provera (oral), Depo-Provera (IM contraceptive), Depo-SubQ Provera 104 (SC) (1) · Sernyl (human, withdrawn 1965); Sernylan (veterinary, withdrawn 1978) (1)

None (10) · '"`UNIQ--vote-00000D11-QINU`"' Same mechanistic family as amphotericin B but with prohibitive systemic toxicity at therapeutic doses, hence restriction to topical and luminal-gut indications. No clinically meaningful resistance after decades of use'"`UNIQ--ref-00000D12-QINU`"'. (1)

None (1) · 0.4 mg PO daily (general prevention); 0.8-1 mg/d in pregnancy; 4 mg/d for women with prior NTD-affected pregnancy; 1 mg/d during methotrexate therapy (1) · 500 mg PO TID × 7-10 days (most indications); 2 g single dose for trichomoniasis; 500 mg IV q8h for severe anaerobic infection; rectal 1 g BID (1) · Contraception: Depo-Provera 150 mg IM every 13 weeks; Depo-SubQ 104 mg SC every 12-13 weeks; oral cycling: 5-10 mg PO daily ×5-10 days for amenorrhea (1) · HRT cyclic: 200 mg PO HS days 1-12 of each month; continuous: 100 mg PO daily; ART luteal support 100 mg vaginal TID or 90 mg gel daily (1) · No current medical indication. Historical anesthetic dose 0.25 mg/kg IV (Sernyl). (1) · Oral 1-2 mg daily; transdermal patch 0.025-0.05 mg/d twice weekly; transdermal gel 0.5-1 g/d; vaginal 10 mcg tablet twice weekly for GSM. Always combine with a progestogen in patients with an intact uterus. (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) · Oral: 4-6 mL (400,000-600,000 units) suspension QID swish-and-swallow; topical: BID-QID; vaginal tablet 1 daily for 2 weeks (1) · Replacement: 1000 mcg IM daily for 1 week, then weekly for 4 weeks, then monthly; or 1000-2000 mcg PO daily (effective even in pernicious anemia via passive diffusion); intranasal 500 mcg weekly (1) · Topical: 1% cream BID × 2-4 weeks; vaginal: 1% or 2% cream nightly × 7 days, or 100/200/500 mg vaginal tablet single or 3-day regimens; troche: 10 mg PO five times daily × 2 weeks for thrush (1)

0.4, 0.8, 1 mg OTC; 1 mg Rx; 5 mg/mL injection (1) · 1% topical cream, lotion, solution; 1%, 2% vaginal cream; 100, 200, 500 mg vaginal tablets; 10 mg oral troches; combination with betamethasone (Lotrisone, Rx) (1) · 100, 250, 500, 1000, 5000 mcg tablets (OTC and Rx); 1000 mcg/mL injection; intranasal spray; sublingual (1) · 100,000 units/mL oral suspension; 500,000 unit tablets; 100,000 units/g cream, ointment, powder; vaginal tablets (1) · 2.5, 5, 10 mg oral tablets; Depo-Provera 150 mg/mL IM; Depo-SubQ Provera 104 mg/0.65 mL (1) · 250, 500 mg tablets; 750 mg ER; 500 mg/100 mL IV; 0.75-1% topical gel/cream; 0.75% vaginal gel; suppository (1) · 75, 150, 300 mg capsules; 75 mg/5 mL solution; 150 mg/mL IV; 1% topical; 2% vaginal cream (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) · Oral 0.5, 1, 2 mg tablets; transdermal patches (twice-weekly and once-weekly); 0.06% gel; 1.53 mg/spray topical; vaginal ring (Estring); vaginal tablet (Vagifem/Yuvafem); vaginal cream (1) · Oral 100, 200 mg capsules (peanut oil; check allergy); 100 mg vaginal insert (Endometrin); 4%, 8% vaginal gel (Crinone); IM 50 mg/mL (1) · Tablets 5, 10, 40 mg (40 mg dispersible restricted to OTPs); oral concentrate 10 mg/mL; oral solution 1, 2, 10 mg/mL; injection 10 mg/mL (1)

1 mg/d typical Rx; higher in specific indications (1) · 4.8 g/d (IV severe infection) (1) · Indication-dependent; 200-400 mg/d oral typical (1) · Indication-specific (2) · Indication-specific; lowest effective dose for shortest duration is the WHI-era standard (1) · N/A (no current medical indication) (1) · No formal hard ceiling; in MOUD maintenance, doses typically remain at or below 120 mg/day with higher doses reserved for documented under-treatment after careful clinical assessment (1) · No strict ceiling; water-soluble vitamin, low toxicity (1) · Topical: BID; troche: 5×/day (1) · ~4 g/d (severe systemic infection) (1)

Contraceptive within 24 hours if given in first 5 days of cycle; otherwise backup for 7 days (1) · Days (1) · Hematologic response within days (1) · Hours (2) · Oral analgesic effect 30-60 minutes; opioid-withdrawal suppression 30 minutes (oral); IV ~10 minutes (1) · Reticulocyte response at 3-5 days; neurologic recovery weeks to months (and may be incomplete if longstanding) (1) · Sedation/dizziness within hours of oral dose; endometrial effects over days (1) · Smoked 2-5 min; insufflated 5-15 min; oral 30-60 min; IV / IM ~5-15 min (1) · Symptom relief within days (1) · Vasomotor relief 2-4 weeks; bone density gains over months (1)

4-8 hours typical; longer at high doses; residual cognitive and perceptual effects up to 48 hours (1) · 6-8 hours (1) · 8-12 hours (1) · Analgesic effect 4-8 hours (much shorter than half-life would suggest, due to receptor kinetics); MOUD effect (opioid withdrawal suppression) 24-36 hours per single daily dose (1) · Depot IM 13 weeks (designed); often persists longer (1) · Hours per application (2) · N/A (replacement) (2) · Oral: 8-12 hours; vaginal: 24+ hours; IM: days (1) · Route- and formulation-dependent (1)

None (1) · 6-8 hours'"`UNIQ--ref-00000BEB-QINU`"' (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) · Not meaningfully described (minimal systemic absorption from topical use)'"`UNIQ--ref-00000F45-QINU`"' (1) · Not meaningfully described (not systemically absorbed)'"`UNIQ--ref-00000D17-QINU`"' (1) · ~0.5 hours plasma; tissue retention longer (1) · ~13-20 hours (oral); transdermal pharmacokinetics buffer the peaks/troughs of oral dosing'"`UNIQ--ref-000003BA-QINU`"' (1) · ~2.5-3 hours'"`UNIQ--ref-00001442-QINU`"' (1) · ~5-20 hours (oral micronized; highly variable)'"`UNIQ--ref-00000726-QINU`"' (1) · ~50 days (Depo-Provera; long depot release)'"`UNIQ--ref-00000F20-QINU`"' (1) · ~6 days (plasma); hepatic stores last 3-5 years (1)

Essentially zero systemic absorption from oral or topical routes — the topical-action-only profile is the basis of its safety'"`UNIQ--ref-00000D18-QINU`"' (1) · High (oral) (1) · Oral ~1-3% via passive diffusion at high doses (independent of intrinsic factor); IM/SC ~100% (1) · Oral ~5% (extensive first-pass to estrone and conjugates); transdermal bypasses first-pass, giving more physiologic estradiol:estrone ratio'"`UNIQ--ref-000003BB-QINU`"' (1) · Oral ~90%; depot IM essentially 100% over the dosing interval'"`UNIQ--ref-00000F21-QINU`"' (1) · Oral: very low (extensive first-pass); micronization improves uptake somewhat. Vaginal: high local effect with lower systemic levels (first-uterine-pass concentration)'"`UNIQ--ref-00000727-QINU`"' (1) · Topical: minimal systemic; troche: ~3% systemic'"`UNIQ--ref-00000F46-QINU`"' (1) · ~70-85% (oral, high relative to other opioids) (1) · ~72% oral; ~85% smoked'"`UNIQ--ref-00000066-QINU`"' (1) · ~80% (oral)'"`UNIQ--ref-00000BEC-QINU`"' (1) · ~90% (oral)'"`UNIQ--ref-00001443-QINU`"' (1)

None (1) · OTC (low-dose) and [[USLegal:Prescription only|Rx-only]] (1 mg, injectable) in US (1) · OTC (low/mid-dose oral) and [[USLegal:Prescription only|Rx-only]] (injection, intranasal) in US (1) · OTC (lower strengths) and [[USLegal:Prescription only|Rx-only]] (combination with betamethasone) in US (1) · [[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) · [[USLegal:Prescription only|Rx-only]] in US (4) · [[USLegal:Prescription only|Rx-only]] in US. Carries a '''Boxed Warning''' for bone mineral density loss with prolonged use (≥2 years; partially reversible after discontinuation)'"`UNIQ--ref-00000F22-QINU`"' (1) · [[USLegal:Prescription only|Rx-only]] in US. Carries a '''Boxed Warning''' for Clostridioides difficile colitis (one of the most C. difficile-inducing antibiotic classes)'"`UNIQ--ref-00001444-QINU`"' (1)