The FDA has dictated a code of federal registry that delineates five categories of the relative safety of drugs when used during pregnancy. (Section 201.57 of the federal drug registry.) Pregnancy Class C means that there have been no human studies on the drug; but there have been abnormal findings in animal studies. However, the potential benefits of taking the drug during pregnancy outweigh the possibility of risk to the human fetus. Because the dose of a medication is often pushed to hundreds of times what the planned human dose would be, it’s very common to have abnormal animal findings in clinical studies, so the majority of drug products fall into the “C” category. Some examples of “C” medications include Biaxin, Acyclovir, Codeine, Sudafed, Actifed, Chloraseptic throat spray or lozenges, Robitussin, Vicks 44, Albuterol, and Monistat.
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