Question: what is a substitute for acyclovir?
Answer: Zovirax (acyclovir) Prescription only. 100% of people say it's worth it. 4 dosage forms. ...  2 alternatives. Valtrex (valacyclovir) Prescription only. 100% of people say it's worth it. 1 dosage forms. ...  Famvir (famciclovir) 33% of people say it's worth it. 1 dosage forms. $20.87 is the lowest price near you Compare this drug.