Is zovirax used for chickenpox?

Is Zovirax (acyclovir) used to treat chickenpox?

Yes. Zovirax, whose active ingredient is acyclovir, is used to treat chickenpox (varicella), especially when started early. Antiviral treatment works best when given within about 24 hours of the rash appearing.

When does acyclovir work best for chickenpox?

For chickenpox, acyclovir is most effective if started soon after symptoms begin—typically within the first day of rash onset. Starting later may provide less benefit.

Who is most likely to be prescribed Zovirax for chickenpox?

Clinicians are more likely to prescribe antivirals for people who are at higher risk of complications, such as:
- Adults with chickenpox
- People with weakened immune systems
- Those with severe or extensive disease

Is Zovirax only for chickenpox, or also for shingles?

Acyclovir (Zovirax) is used for more than chickenpox. It’s also used for herpes infections, including shingles (herpes zoster), with the exact indication depending on age and clinical situation.