Cardizem and Pregnancy

In studies on Cardizem and pregnancy, the medication caused increased miscarriages and birth defects when it was given to pregnant rats, rabbits, and mice. Due to these potential problems, Cardizem should only be prescribed to pregnant women if a healthcare provider believes that the benefits outweigh any possible risks to the unborn child. If you are taking Cardizem and pregnancy occurs, contact your healthcare provider.

Cardizem and Pregnancy: An Overview

Cardizem® (diltiazem hydrochloride) may not be safe for pregnant women. This is based on animal studies that looked at the effects of the drug during pregnancy.
 

Cardizem and Pregnancy Category C

The U.S. Food and Drug Administration (FDA) uses a category system to classify the possible risks to a fetus when a specific medicine is taken during pregnancy. Pregnancy Category C is given to medicines that have not been studied in pregnant humans but that do appear to cause harm to the fetus in animal studies. Also, medicines that have not been studied in any pregnant women or animals are automatically given a pregnancy Category C rating.
 
Cardizem was given a pregnancy Category C rating because of potential problems in animal studies. When given to pregnant rabbits, mice, and rats, the drug caused increased miscarriages and birth defects (especially skeletal problems).
 
However, it is important to note that animals do not always respond to medicines the same way that humans do. Therefore, a pregnancy Category C medicine may be given to a pregnant woman if her healthcare provider believes that the benefits to the woman outweigh any possible risks to the unborn child.
 

Cardizem and Pregnancy: Final Thoughts

If you are pregnant or are thinking of becoming pregnant while taking Cardizem, let your healthcare provider know. He or she will consider both the benefits and risks of using the drug during pregnancy before making a recommendation in your particular situation.
 
Pregnancy and Pain

Cardizem Drug Information

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