Skip to main content
An official website of the United States government
Government Funding Lapse
Because of a lapse in government funding, the information on this website may not be up to date, transactions submitted via the website may not be processed, and the agency may not be able to respond to inquiries until appropriations are enacted.

The NIH Clinical Center (the research hospital of NIH) is open. For more details about its operating status, please visit cc.nih.gov.

Updates regarding government operating status and resumption of normal operations can be found at opm.gov.

acyclovir

A synthetic analog of the purine nucleoside, guanosine, with potent antiviral activity against herpes simplex viruses type 1 and 2, varicella-zoster virus and other viruses of the herpesvirus family. After conversion in vivo to the active metabolite acyclovir triphosphate by viral thymidine kinase, acyclovir competitively inhibits viral DNA polymerase by incorporating into the growing viral DNA chain and terminating further polymerization.
Synonym:aciclovir
acycloguanosine
US brand name:Zovirax
Foreign brand name:Acicloftal
Aclovir
Cargosil
Virorax
Abbreviation:ACV
Code name:BW-248U
Wellcome-248U
Chemical structure:2-amino-1,9-dihydro-9-[(2-hydroxyethoxy)methyl]-6H-purin-6-one
9-[(2-hydroxyethoxy)methyl]guanine
Search NCI's Drug Dictionary