Acyclovir (also known by the abbreviation ACV) is an antiviral drug capable of interfering with the DNA synthesis of viruses.
Aciclovir - Chemical Structure
From a chemical point of view, acyclovir is an analogue of guanosine, one of the nucleosides that make up DNA.
Aciclovir is marketed in the form of pharmaceutical formulations suitable for oral, ocular, cutaneous and intravenous administration.