Does aciclovir contain penicillin?

Does aciclovir include penicillin or a “penicillin” ingredient?

No. Aciclovir is an antiviral medicine used to treat viral infections such as herpes viruses. It is not a penicillin-type antibiotic and does not contain penicillin as an active ingredient.

What if someone is allergic to penicillin?

A penicillin allergy is not the same as an aciclovir sensitivity, since aciclovir is a different class of medicine. People with penicillin allergy generally can use aciclovir without the risk being the same as taking penicillin. Still, check the exact product and talk to a clinician or pharmacist if you’ve had a serious drug allergy before.

Could any aciclovir brand contain penicillin in inactive ingredients?

Penicillin would be unusual for aciclovir, because aciclovir products are formulated as antivirals, not antibiotics. However, inactive ingredients can vary by brand and country. If you need to be certain, look at the specific package label or medication leaflet for that exact product.