Skip to main content

Who can and cannot take or use aciclovir - Brand names: Zovirax, Cymex Ultra, Virasorb

Who can take or use aciclovir

Most adults and children can take aciclovir tablets or liquid, or use aciclovir cream, cold sore cream or eye ointment.

Who may not be able to take or use aciclovir

Aciclovir is not suitable for some people. To make sure it's safe for you, tell your doctor if you:

  • have ever had an allergic reaction to aciclovir or any other medicine
  • have kidney problems
  • are over 65 years old
  • are pregnant, trying to get pregnant or breastfeeding

If your immune system is weakened (for example, if you have HIV or AIDS, or you have had a bone marrow transplant), talk to your doctor about the best type of aciclovir for you. They may recommend tablets rather than the cream.

Page last reviewed: 1 July 2022
Next review due: 1 July 2025