RT Journal Article SR Electronic T1 Safety of antiviral medication for the treatment of herpes during pregnancy JF Canadian Family Physician JO Can Fam Physician FD The College of Family Physicians of Canada SP 427 OP 428 VO 57 IS 4 A1 So-Hee Kang A1 Angela Chua-Gocheco A1 Pina Bozzo A1 Adrienne Einarson YR 2011 UL http://www.cfp.ca/content/57/4/427.abstract AB Question One of my patients is a pregnant woman in her first trimester with a history of recurrent genital herpes. She is concerned about whether use of her antiviral medication will adversely affect her baby. What should I tell her? Answer Studies have shown that the use of acyclovir or valacyclovir is not associated with an increase in birth defects. Limited data exist for famciclovir and therefore it would not be considered a first-line choice for treatment of herpes during pregnancy.