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Animal studies involving Aromasin and pregnancy showed that the drug increased the risk of miscarriages when given to pregnant rats and rabbits. As a result, the FDA has classified it as a pregnancy Category X medication, meaning it should be avoided during pregnancy. In addition, this drug would likely not be taken by a pregnant woman in the first place, as it is approved for postmenopausal women.
Aromasin and Pregnancy: An OverviewAromasin® (exemestane) is generally not considered safe for women who are pregnant. In animal studies that looked at the effects of Aromasin during pregnancy, the drug caused miscarriages.
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 X is given to medicines that show problems to the fetus in animal studies or in human use of the medication. With this category, the potential risks clearly outweigh the potential benefits.
Aromasin was given a pregnancy Category X rating because of problems in animal studies. When given to pregnant rats and rabbits, the drug increased the risk of miscarriages.
However, there may be situations in which you and your healthcare provider decide that it is in your best interest to take Aromasin during pregnancy. It is important to remember that this drug is approved only for use in postmenopausal women. The manufacturer states that pregnant women should not take Aromasin.