Aciclovir(cyclovir) 400mg 30'sCyclovir 400mg contains acyclovir which is an antiviral drug. It treats infections caused by certain types of viruses. However, it is not a cure for these infections. It treats cold sores around the mouth, shingles, and chickenpox. Also, this medication treats outbreaks of genital herpes. It also helps reduce the number of future episodes. The viruses that cause these infections continue to live in the body even between outbreaks. Acyclovir decreases