is acyclovir the same as valtrex?
Famciclovir (FamvirÂ®) and Valacyclovir (ValtrexÂ®) Both are new antiherpesviral prodrugs (in the same class as acyclovir). Indication: Acute herpes zoster in the immunocompetent host. (Their role in genital herpes will be discussed in a future Therapeutics Letter). Mechanism of Action: Reduce viral replication by inhibiting viral DNA polymerase.