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Coreg CR and Breastfeeding

In animal studies on breastfeeding and Coreg CR (carvedilol CR), the active ingredient of the medication was shown to pass through breast milk. However, it is not known whether this is also true for humans. Because of the unknown risks, the manufacturer of Coreg CR warns against using this drug while breastfeeding. Before taking this medication, breastfeeding women should first consult their healthcare providers.

Is Taking Coreg CR While Breastfeeding Safe?

At this time, it is not known if Coreg CR® (carvedilol CR) passes through breast milk in humans. The manufacturer of Coreg CR recommends that breastfeeding women avoid taking this medication. Therefore, if you are breastfeeding, talk with your healthcare provider before taking Coreg CR.

What Does the Research Say?

Studies have shown that carvedilol (the active ingredient in Coreg CR) passes through breast milk in rats. In these studies, the newborn rats whose mothers were given carvedilol had a decreased chance for survival. It is unknown if similar problems might occur in humans.
Because of the unknown risks, a different beta blocker (or even a different type of medication) may be a better option. If your healthcare provider decides that you should take Coreg while nursing, it is a good idea to have your infant's heart rate and blood pressure monitored, to make sure no problems are occurring.

Talking With Your Healthcare Provider

You should talk with your healthcare provider about breastfeeding while taking Coreg CR. Each woman's situation is different, and you and your healthcare provider understand your situation best. After considering what you want and expect, as well as your current health situation, the two of you can make a shared decision about breastfeeding and Coreg CR that is right for you.
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