Drilldown: Medicines

Diphenhydramine (hydrochloride; citrate) (1) · Hydralazine (1)

Apresoline (historical); mostly generic; combination with isosorbide dinitrate marketed as BiDil for self-identified Black patients with HFrEF (1) · Benadryl (oral, injectable, topical), Banophen, Sominex (sleep aid), ZzzQuil, Aler-Dryl (1)

Research material · Classic Psychedelic · Stimulant · Opioid · Sedative-Hypnotic · Phenethylamine · Tryptamine · Benzodiazepine · Botanical · [[:Category:Antihypertensives|Antihypertensive]] · Dissociative · Anticonvulsant · Antidepressant · Plant Medicine · Analgesic · Antiparkinsonian · Antipsychotic · Empathogen · Neuroleptic · Cathinone

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None (1) · '"`UNIQ--vote-0000001D-QINU`"' Major Beers-list concern in elderly patients for cognitive and fall risks. CYP2D6 substrate. At massive overdose, also produces sodium channel blockade with cardiac toxicity'"`UNIQ--ref-0000001E-QINU`"'. '"`UNIQ--effect-0000001F-QINU`"' (1)

'"`UNIQ--vote-00000020-QINU`"', '"`UNIQ--vote-00000021-QINU`"', '"`UNIQ--vote-00000022-QINU`"', '"`UNIQ--vote-00000023-QINU`"', '"`UNIQ--vote-00000024-QINU`"', '"`UNIQ--vote-00000025-QINU`"' (1) · '"`UNIQ--vote-00000683-QINU`"', '"`UNIQ--vote-00000684-QINU`"', '"`UNIQ--vote-00000685-QINU`"', '"`UNIQ--vote-00000686-QINU`"' (1)

Allergy: 25-50 mg PO every 4-6 hours. Insomnia: 25-50 mg PO at bedtime. IV (acute dystonia, severe allergic reaction): 25-50 mg slow IV push (1) · PO 10 mg QID; IV 5-10 mg every 20-30 minutes for hypertensive emergency (1)

10, 25, 50, 100 mg tablets; 20 mg/mL IV (1) · Tablets 25, 50 mg; capsules; liquid; chewable; topical cream/gel; injection 50 mg/mL (1)

300 mg/d typical practical limit (toxicity rises sharply above) (1) · 300 mg/day (oral) (1)

None · Oral · IV · Topical · IM · intranasal · rectal · Subcutaneous · Topical ophthalmic · ophthalmic · intramuscular · intravenous · transdermal · vaginal · Subcutaneous (abdomen · sublingual · thigh · Inhaled · SC · intra-articular

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15-30 minutes (oral); 1-2 minutes (IV) (1) · IV: 5-20 minutes; PO: 30-60 minutes (1)

4-6 hours (1) · IV: 1-4 hours; PO: 3-8 hours (1)

3-7 hours (slow acetylators) vs 1-3 hours (rapid acetylators) via NAT2 polymorphism'"`UNIQ--ref-00000687-QINU`"' (1) · 4-8 hours (longer in elderly, 9-13 hours)'"`UNIQ--ref-00000026-QINU`"' (1)

~25-50% (oral; substantial first-pass via NAT2 acetylation, phenotype-dependent)'"`UNIQ--ref-00000688-QINU`"' (1) · ~40-60% (oral, with significant first-pass)'"`UNIQ--ref-00000027-QINU`"' (1)

Older agent with substantial use experience; broadly considered safe in pregnancy'"`UNIQ--ref-00000028-QINU`"' (1) · One of the historically preferred IV agents for severe hypertension in pregnancy alongside labetalol and nifedipine.<sup class="pcp-cn" title="This claim needs a citation.">&#91;[[Pharmacopedia:Citation needed|citation&nbsp;needed]]&#93;</sup> (1)

[[USLegal:Over-the-counter|OTC]] for most oral and topical formulations; [[USLegal:Prescription only|Rx-only]] for injectable (1) · [[USLegal:Prescription only|Rx-only]] in US (1)