Ulesfia and Pregnancy
The FDA has given a pregnancy Category B rating to the head lice medicine Ulesfia (benzyl alcohol lotion). This means that it is probably safe for use by women who are expecting. Because the medication is applied to the scalp and very little of it is absorbed into the mother's bloodstream, Ulesfia is unlikely to cause problems in a fetus.
Ulesfia® (benzyl alcohol lotion) is a prescription head lice medication. Based on animal studies, this medication does not appear to pose a significant risk to a fetus.
The U.S. Food and Drug Administration (FDA) uses a pregnancy 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 adequately studied in pregnant humans, but do not appear to cause harm to the fetus in animal studies.
Also, medications that have been shown to be safe for use in pregnancy in humans but have caused problems in laboratory animals are also given a Category B rating.
Ulesfia has not been studied in pregnant women. However, animal studies indicate that the drug is unlikely to cause problems during pregnancy. Although benzyl alcohol (the active ingredient in Ulesfia) can cause dangerous problems in newborns, these problems are unlikely to occur in a baby if the mother uses Ulesfia during pregnancy, as very little of the medication is absorbed into the mother's bloodstream.
However, it is important to note that animals do not always respond to medicines in the same way that humans do. Therefore, a pregnancy Category B medicine should be given to a pregnant woman only if the healthcare provider believes that the benefits to the pregnant woman outweigh any possible risks to the unborn child.