Acyclovir used for?

Acyclovir is an antiviral medicine used to treat infections caused by herpesviruses. Its main targets are HSV-1, HSV-2, and varicella-zoster virus (VZV).

Common uses:
- Genital herpes (initial or recurrent episodes) and to help prevent recurrences
- Cold sores (herpes labialis)
- Shingles (herpes zoster) and chickenpox (varicella), including certain nerve pain after shingles
- Severe HSV infections (such as herpes simplex encephalitis) or other serious infections, often given by IV
- Prophylaxis in people with weakened immune systems to prevent HSV outbreaks

How it works:
- It’s converted inside infected cells into an active form that inhibits viral DNA synthesis, helping to limit viral replication.

Important notes:
- It’s not a cure for herpes; it helps manage symptoms, shorten outbreaks, and reduce viral shedding.
- IV use can cause kidney-related side effects; staying well hydrated helps.
- Topical and oral forms are available; topical is mainly for cold sores and is less effective than oral in many cases.

If you have a specific infection or situation in mind, I can tailor the info (including common dosing ranges and what to watch for).