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Zithromax® (azithromycin) is considered a pregnancy Category B medicine by the U.S. Food and Drug Administration (FDA), which means that it has not been studied in pregnant women. However, when studied in pregnant animals, Zithromax showed no negative effects on unborn babies.
The FDA uses a category system to classify the possible risks to a fetus when a specific medicine is taken during pregnancy. Pregnancy Category B is given to medicines that have not been studied in pregnant humans but do not appear to cause harm to the fetus in animal studies.
However, it is important to note that animals do not always respond to medicines the same way that humans do. Therefore, a pregnancy Category B medicine may be given to a pregnant woman if her healthcare provider believes that its benefits to her outweigh any possible risks to her unborn child.
If you are pregnant and have been prescribed Zithromax, let your healthcare provider know. He or she will consider both the benefits and risks of taking this drug during pregnancy before making a recommendation in your particular situation.
Written by/reviewed by: Kristi Monson, PharmD; Arthur Schoenstadt, MD
Last reviewed by: Kristi Monson, PharmD;
Last updated/reviewed:
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