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Calcium Channel Blockers

Fetal safety of calcium channel blockers

Fatoumah Alabdulrazzaq, MD and Gideon Koren, MD, FRCPC, FACMT

July 2012



Many of my pregnant or lactating patients are taking calcium channel blockers (CCBs) for hypertension. How safe is maternal use of CCBs for fetuses and nursing infants?


Generally, CCBs have not been shown to increase teratogenic risk. Information regarding the safety of CCBs during lactation is limited, although they are not likely to pose a risk to the nursing infant.


Bon nombre de mes patientes enceintes ou qui allaitent prennent des inhibiteurs calciques (IC) pour l'hypertension. Dans quelle mesure l'utilisation maternelle des IC est-elle sécuritaire pour le fœtus et les nourrissons allaités?


En règle générale, il n'a pas été démontré que les IC présentaient un risque tératogène. Les renseignements concernant l'innocuité des IC durant l'allaitement sont limités, mais il est improbable qu'ils posent un risque pour le nourrisson allaité.

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