May 27 2022


Acyclovir is compatible with breastfeeding.

The amount of drug that passes through breastmilk is very little, usually less than 1% of the usual dosis for children. By this reason, it is not probable that acyclovir causes any side effect.

When acyclovir is administered to a baby, dosis can arises to 30 mg/kg/day. Topical aplication of acyclovir away from the breast, have no risk for breastfed infant. On the other hand, if topical application over the breast is needed, the zone should be cleaned before feeding the baby.

Warning of the manufacturer:

Aciclovir has been detected in breast milk at concentrations ranging from 0.6 to 4.1 times the corresponding plasma levels. These levels would potentially expose nursing infants to aciclovir dosages of up to 0.3 mg/kg/day. Therefore it is advised that acyclovir is used with caution whilst breast feeding.

Talk to your doctor before taking this medicine if you are pregnant, planning to become pregnant or are breast feeding.