Aciclovir 400 mg tablets are an antiviral medication used to treat and prevent various viral infections.
Uses: It is commonly prescribed for infections caused by the herpes simplex virus, such as cold sores and genital herpes, as well as for shingles and chickenpox (caused by the varicella-zoster virus).
Mechanism: The drug works by preventing the virus from multiplying, which helps to reduce the severity and duration of symptoms.