Acyclovir (noun)

1. A antiviral drug used to treat infections caused by herpes viruses, including genital herpes, shingles, and chickenpox.
2. A medication used to prevent or treat viral infections.

Origin:

Derived from its chemical name, 2-amino-1,9-dihydro-9-[(2-hydroxyethoxy)methyl]-6h-purin-6-one.

Examples:

1. Acyclovir is commonly used to treat genital herpes.
2. The patient was prescribed acyclovir to treat the shingles.
3. Acyclovir is a well-tolerated antiviral drug.
4. Acyclovir is used prophylactically to prevent outbreaks of genital herpes.
5. The acyclovir cream was effective in reducing the duration of the cold sore.