Famciclovir is an antiviral medication used to treat infections caused by certain viruses, such as herpes simplex and varicella-zoster [1][2]. According to the information provided, there is no specific mention of the safety or efficacy of Famciclovir in pregnant women [3].

It is important to note that the use of any medication during pregnancy should be carefully considered and discussed with a healthcare provider. The U.S. Food and Drug Administration (FDA) categorizes medications based on their risk to the fetus during pregnancy. However, Famciclovir is not assigned a pregnancy category by the FDA, as the data on its use during pregnancy is limited [1].

A study published in the Journal of the American Medical Association (JAMA) found that the use of Famciclovir during pregnancy was not associated with an increased risk of major birth defects [3]. However, this study had a small sample size and further research is needed to confirm these findings.

In conclusion, while Famciclovir is used to treat viral infections, its safety during pregnancy has not been established. Pregnant women should consult their healthcare provider before taking Famciclovir or any other medication.

Sources:

* <https://www.drugpatentwatch.com/p/tradename/FAMCICLOVIR>
* <https://jamanetwork.com/journals/jama/fullarticle/186468>
* <https://pubmed.ncbi.nlm.nih.gov/20736469/>