Acyclovir 800mg 

Drug Facts: One of the first effective antiviral drugs used to kill the herpes virus. Herpes zoster can kill, especially adults who have never had the disease called chickenpox as a child. Even those who have had chickenpox can get a Herpes zoster breakout later in life, called shingles.

Uses: Acyclovir kills the viruses that cause chickenpox, shingles, herpes simplex I and Il (herpes outbreaks of the mouth and genitals)