About acyclovir
Antiviral nucleoside analogue
Used for
- Treats recurrent cold sores caused by herpes simplex virus.
- May shorten healing time when started at the earliest symptoms.
Usual adult dose
Apply five times daily, about every four hours while awake, for four days.
Usual dose in children
For cold sores, usual dosing is the same as for adults; follow product labeling.
Common side effects
- Temporary burning or stinging
- Dryness or peeling
- Itching or redness
Important warnings
- For external use only; avoid eyes and inside the mouth.
- Start as early as possible; it may not prevent spreading infection.
- Do not use for genital herpes or shingles unless specifically directed.
Pregnancy
Generally considered low risk because little is absorbed through skin; use when needed as directed.
Breastfeeding
Skin absorption is low; avoid applying where an infant could ingest or contact the cream.
AI-generated from general medical knowledge, not from this product's official leaflet. It may be incomplete or out of date. Not medical advice — ask a pharmacist or doctor before making any decision.