Drilldown: Medicines

Cyanocobalamin (vitamin B12) (1) · Diltiazem (1) · Folic acid (folate, pteroylglutamic acid) (1)

Cardizem, Tiazac, Cartia XT, Dilacor XR, Taztia XT, Matzim LA (1) · Folvite; mostly generic (1) · Many OTC and Rx; Nascobal (intranasal); generic injection (1)

[[:Category:Antianginals|Antianginal]] (1) · [[:Category:Antiarrhythmics|Antiarrhythmic (class IV)]] (1) · [[:Category:Antihypertensives|Antihypertensive]] (1) · [[:Category:B-vitamins|B-vitamin]] (2) · [[:Category:Calcium_channel_blockers|Calcium channel blocker (non-dihydropyridine)]] (1) · [[:Category:Hematinics|Hematinic]] (2) · [[:Category:Vitamins|Vitamin]] (2)

None (2) · '"`UNIQ--vote-0000063C-QINU`"' Avoid in HFrEF (negative inotropy). CYP3A4 substrate AND moderate inhibitor — interacts substantially with statins (especially simvastatin), tacrolimus, cyclosporine, and many other CYP3A4 substrates'"`UNIQ--ref-0000063D-QINU`"'. (1)

'"`UNIQ--vote-000005B3-QINU`"', '"`UNIQ--vote-000005B4-QINU`"', '"`UNIQ--vote-000005B5-QINU`"', '"`UNIQ--vote-000005B6-QINU`"' (1) · '"`UNIQ--vote-00000607-QINU`"', '"`UNIQ--vote-00000608-QINU`"', '"`UNIQ--vote-00000609-QINU`"', '"`UNIQ--vote-0000060A-QINU`"' (1) · '"`UNIQ--vote-0000063E-QINU`"', '"`UNIQ--vote-0000063F-QINU`"', '"`UNIQ--vote-00000640-QINU`"', '"`UNIQ--vote-00000641-QINU`"' (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) · ER 180-240 mg PO once daily; IR 30 mg PO QID; IV 0.25 mg/kg over 2 min for acute rate control, then 5-15 mg/h infusion (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)

0.4, 0.8, 1 mg OTC; 1 mg Rx; 5 mg/mL injection (1) · 100, 250, 500, 1000, 5000 mcg tablets (OTC and Rx); 1000 mcg/mL injection; intranasal spray; sublingual (1) · IR 30, 60, 90, 120 mg tablets; multiple ER capsules and tablets 60-420 mg; IV 5 mg/mL (1)

1 mg/d typical Rx; higher in specific indications (1) · No strict ceiling; water-soluble vitamin, low toxicity (1) · ~480 mg/d (oral); IV per protocol (1)

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

Other values:

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Hematologic response within days (1) · IV: 3-7 minutes (rate control); PO IR: 30-60 minutes; ER: hours (1) · Reticulocyte response at 3-5 days; neurologic recovery weeks to months (and may be incomplete if longstanding) (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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3-4.5 hours (IR); 5-7 hours (ER; effective duration 24 hours via formulation)'"`UNIQ--ref-00000642-QINU`"' (1) · ~0.5 hours plasma; tissue retention longer (1) · ~6 days (plasma); hepatic stores last 3-5 years (1)

High (oral) (1) · Oral ~1-3% via passive diffusion at high doses (independent of intrinsic factor); IM/SC ~100% (1) · ~40% (oral; extensive first-pass via CYP3A4)'"`UNIQ--ref-00000643-QINU`"' (1)

Limited data; labetalol/nifedipine generally preferred. Crosses placenta.<sup class="pcp-cn" title="This claim needs a citation.">&#91;[[Pharmacopedia:Citation needed|citation&nbsp;needed]]&#93;</sup> (1) · Routinely supplemented in pregnancy and preconception to prevent neural tube defects.<sup class="pcp-cn" title="This claim needs a citation.">&#91;[[Pharmacopedia:Citation needed|citation&nbsp;needed]]&#93;</sup> (1) · Routinely supplemented in vegan pregnancies and pernicious anemia.<sup class="pcp-cn" title="This claim needs a citation.">&#91;[[Pharmacopedia:Citation needed|citation&nbsp;needed]]&#93;</sup> (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) · [[USLegal:Prescription only|Rx-only]] in US (1)