What is famciclovir's fda pregnancy category?

What is famciclovir’s FDA pregnancy category?

Famciclovir’s FDA pregnancy category is C. [1]

Why you may see different “pregnancy categories” online

The FDA phased out the old pregnancy letter categories (A, B, C, D, X) and replaced them with the Pregnancy and Lactation Labeling Rule (PLLR), which uses narrative risk summaries instead of letter categories. If you’re looking at newer labeling or summaries, the letter may not appear even though the older category was C. [2]

Does “Category C” mean it is unsafe?

FDA category C generally means that animal studies have shown an adverse effect on the fetus and there are no adequate controlled studies in pregnant people, but potential benefits may warrant use in pregnant patients in certain situations. [2]

Sources

1. https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=
   
2. https://www.accessdata.fda.gov/scripts/cder/daf/index.cfm?event=overview.process