Is aciclovir penicillin?

Is aciclovir a penicillin?

No. Aciclovir is not a penicillin. It is an antiviral medicine, used to treat infections caused by herpes viruses, such as herpes simplex (including cold sores and genital herpes) and herpes zoster (shingles).

Why people might mix them up

The confusion often comes from the names: “aciclovir” and “penicillin” both sound like antibiotic-category drugs, but they work differently. Penicillins are antibiotics (used for bacteria), while aciclovir is an antiviral (used for viruses).

What class is aciclovir in, then?

Aciclovir belongs to the antiviral class called nucleoside analogues, which block viral DNA replication.

Is aciclovir safe for people allergic to penicillin?

A penicillin allergy is usually about antibiotics like penicillin-class drugs and different proteins/immune triggers. Since aciclovir is not a penicillin, it is generally not the same allergen category. Still, patients should follow their clinician’s advice—especially if they have had multiple drug allergies or prior reactions to antivirals.

Related question: is aciclovir an antibiotic?

No. Aciclovir is not an antibiotic; it does not treat bacterial infections.

Sources: None provided.