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Medicines > classes: [[:Category:Antianginals|Antianginal]] & onset : IR 20 minutes; ER ~6 hours or None

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generic:
Nifedipine (1)
brand:
Procardia, Procardia XL, Adalat CC, Afeditab CR (1)
classes: (Click arrow to add another value)
mechanism:
None (1)
uses:
'"`UNIQ--vote-00000747-QINU`"', '"`UNIQ--vote-00000748-QINU`"', '"`UNIQ--vote-00000749-QINU`"', '"`UNIQ--vote-0000074A-QINU`"', '"`UNIQ--vote-0000074B-QINU`"', '"`UNIQ--vote-0000074C-QINU`"' (1)
starting dose:
ER 30-60 mg PO once daily; immediate-release 10 mg PO TID (now rarely used for hypertension due to reflex tachycardia) (1)
preparations:
10, 20 mg IR capsules; 30, 60, 90 mg ER tablets (1)
fda max:
120 mg/d (ER); IR not for chronic hypertension (1)
routes:
MI reports) (1) · Oral; sublingual IR is discouraged (uncontrolled BP drops (1)
onset: (Click arrow to add another value)
duration:
IR 4-8 hours; ER 24 hours (1)
halflife:
2-5 hours (IR); ER formulations extend functional duration via osmotic/matrix release'"`UNIQ--ref-0000074D-QINU`"' (1)
bioavailability:
~50% IR (extensive first-pass via CYP3A4); ER products release-rate-limited'"`UNIQ--ref-0000074E-QINU`"' (1)
pregnancy:
Oral nifedipine is one of the preferred agents for severe hypertension in pregnancy and for tocolysis in preterm labor.<sup class="pcp-cn" title="This claim needs a citation.">&#91;[[Pharmacopedia:Citation needed|citation&nbsp;needed]]&#93;</sup> (1)
legal:
[[USLegal:Prescription only|Rx-only]] in US (1)

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