Acyclovir is used to treat a variety of viral infections caused by herpes viruses, including herpes simplex infections that appear as cold sores or skin ulcers, genital herpes to help reduce symptoms and slow the spread of the virus, prevention and treatment of chickenpox infection in children and adults,
Acyclovir to treat shingles that occurs as a result of the activation of the herpes virus after chickenpox, and as a prophylaxis for people with weakened immune systems to reduce the risk of recurrence of the viral infection.