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What should I know before taking a calcium channel blocker?

Donna Hill Howes, RN
Family Practitioner

If you have advanced aortic stenosis, you should not take nicardipine. If you have aortic stenosis of any severity, nifedipine may not be a good option for you.

If you have Duchenne muscular dystrophy, you should not take verapamil.

If you have heart failure or liver impairment, a calcium channel blocker may not be a good option for you.

If you have impaired kidney function, diltiazem and verapamil may not be good options for you.

If you have sick sinus syndrome or second-degree or third-degree AV block, you should not take verapamil or diltiazem unless a permanent pacemaker is in place.

If you are pregnant, planning to become pregnant, or may be pregnant, a calcium channel blocker may not be a good option for you. It is not known if it is safe for pregnant women.

You should not take a calcium channel blocker if you are breastfeeding.

This answer was adapted from Sharecare's award-winning AskMD app. Start a consultation now to find out what's causing your symptoms, learn how to manage a condition, or find a doctor.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.