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.