Aciclovir 400 mg Tablets contain a medicine called aciclovir. This belongs to a group of
medicines called antivirals. It works by killing or stopping the growth of viruses.
Aciclovir can be used to
- treat chickenpox and shingles
- treat cold sores, genital herpes and other herpes simplex infections
- stop these problems returning after you have had them
- stop these problems in people whose immune system works less well, which means their
bodies are less able to fight infections