Acyclovir use while Breastfeeding. Drugs containing Acyclovir: Zovirax, Zovirax Cream, Zovirax Ointment, Sitavig, Avaclyr, Xerese, Lipsovir.The authors estimated that a fully breastfed infant would receive a daily dosage of 0.73 mg/kg of acyclovir at this maternal dosage or about 1% of the maternal...