Acyclovir
Also known as: Aciclovir
System: AllopathyClass: AntiviralComposition: AcyclovirPrescription: Prescription OnlyEssential medicine (NLEM): Yes
Acyclovir treats herpes infections, including chickenpox, shingles, cold sores and genital herpes.
Common brands
- Zovirax
- Acivir
Dosage forms
- Tablet
- Cream
- Infusion
Uses
- Chickenpox (adults and high-risk)
- Shingles
- Cold sores
- Genital herpes
How it works
Stops herpes viruses from copying their DNA.
How to take
Start as early as possible; drink plenty of water.
Common side effects
- Nausea
- Headache
- Diarrhoea
Serious side effects — get medical help
- Kidney injury
- Confusion (in elderly or kidney disease)
Who should not take it
- Allergy to acyclovir
Interactions
- Other kidney-affecting drugs
Pregnancy & breastfeeding
Used in pregnancy when needed.
Alcohol & driving
No specific restriction.
Storage
Store below 30°C.
Used for these conditions
Prescribed by
Brands available in India
Frequently asked questions
What is Acyclovir used for?
Chickenpox (adults and high-risk), Shingles, Cold sores, Genital herpes
What are the side effects of Acyclovir?
Nausea, Headache, Diarrhoea
How should I take Acyclovir?
Start as early as possible; drink plenty of water.
Who should not take Acyclovir?
Allergy to acyclovir
Medically reviewed by
Medical review pending
Last updated
11 October 2026
Sources
- National List of Essential Medicines (NLEM) 2022, MoHFW
- National Formulary of India, Indian Pharmacopoeia Commission
- CDSCO approved drug information
This information is for general awareness and does not replace advice from a qualified doctor. Do not start, stop or change any medicine without medical advice.