The U.S. Food and Drug Administration is warning women of child-bearing age that Topamax, which is an epilepsy drug, can increase the risk of birth defects around the mouth. Data collected from a registry of pregnant women showed a higher rate of cleft lip and cleft palate in babies whose mothers were taking the drug during the first trimester, according to the FDA. Infants who were exposed to the drug had a 1.4% rate of mouth defects, which was more than three times greater than that seen with other seizure medications. The frequency of the defects in mothers not taking any epilepsy medication is .07%. Dr. Russell Katz, director of the FDA’s Division of Neurology Products, stated:
Health care professionals should carefully consider the benefits and risks of topiramate when prescribing it to women of child-bearing age. Alternative medications that have a lower risk of birth defects should be considered.
The FDA raised the drug’s pregnancy category to D, which means there is evidence the drug can harm a human fetus, but there are situations where the drug’s benefits to the mother could outweigh its risks. The FDA did not place the drug in “category X,” which means the drug should never be used by women who are or may become pregnant.
Topamax is marketed by Johnson & Johnson to control seizures caused by epilepsy, a neurological disorder that causes excessive nerve signals in the brain. The drug is also used to prevent migraine headaches. Roughly 4.3 million patients filled prescriptions for the drug between 2007 and 2010. J&J and generic companies who market the drug, known as topiramate, will be required to add a stronger warning label about the drug’s effect on pregnancies. Women taking topiramate should talk to their doctor immediately if they are planning to or become pregnant, the FDA said. Oral cleft defects occur when parts of the mouth do not completely fuse together, which can lead to difficulties eating and talking. The problem can usually be successfully treated with surgery that closes the lip or palate.
Source: USA Today
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