Drilldown: Medicines

Cholecalciferol (vitamin D3) (1)

Many OTC; Rx 50,000 IU also available (1)

[[:Category:Fat-soluble_vitamins|Fat-soluble vitamin]] (1) · [[:Category:Vitamin_D_analogs|Vitamin D analog]] (1)

'"`UNIQ--vote-0000042C-QINU`"' D3 is more potent than D2 at raising and sustaining serum 25(OH)D per dose, and is the more common OTC formulation; D2 remains the dominant Rx 50,000 IU formulation in the US for historical reasons. (1)

'"`UNIQ--vote-0000042D-QINU`"', '"`UNIQ--vote-0000042E-QINU`"', '"`UNIQ--vote-0000042F-QINU`"', '"`UNIQ--vote-00000430-QINU`"' (1)

Maintenance 800-2,000 IU PO daily; deficiency replacement 50,000 IU PO weekly for 8-12 weeks then maintenance, or equivalent daily dosing 5,000-10,000 IU/d (1)

OTC 400, 1,000, 2,000, 5,000 IU softgels and tablets; Rx 50,000 IU capsules; liquid drops 400-2,000 IU/drop (1)

None · Indication-specific · 40 mg/d · 10 mg/d · 20 mg/d · 80 mg/d · 10 mg/d (adults) · 100 mg/d · 4 g/d · 400 mg/d · 40 mg/d typical; up to 240 mg/d for Zollinger-Ellison · 5 mg/d · 50 mg/d · 600 mg/d · No fixed ceiling; titrate to clinical effect and tolerability with CDC opioid prescribing guidance constraints on morphine-milligram-equivalent (MME) totals · No fixed maximum; titrated to TSH target · TID per eye · Titrated to glucose; no fixed ceiling · Titrated to glucose; no fixed maximum · '''20 mg/day in adults >60 years''' per FDA's 2011-2012 QT-prolongation warning; 40 mg/day in adults ≤60

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for severe malabsorption) (1) · IM (rare (1) · Oral (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

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Long; fat-soluble storage in adipose (1)

~24 hours (parent); ~15 days (25(OH)D); tissue stores months (1)

~75% (oral; absorption improved with fat-containing meal) (1)

Safe at replacement doses; deficiency is itself a risk in pregnancy and lactation.<sup class="pcp-cn" title="This claim needs a citation.">&#91;[[Pharmacopedia:Citation needed|citation&nbsp;needed]]&#93;</sup> (1)

OTC (most) and [[USLegal:Prescription only|Rx-only]] (50,000 IU) in US (1)