Acyclovir monophosphate is the monophosphate ester of Acyclovir. Acyclovir is an antiviral agent with activity against herpes simplex virus types 1 and 2 (HSV-1 and HSV-2) and varicella zoster virus. Acyclovir is converted by a herpesvirus enzyme into acyclovir triphosphate that inhibits the synthesis of deoxyribonucleic acid (DNA) molecules in the virally infected cells, thereby inhibiting viral replication. It induces apoptosis in cells transfected with HSV-TK (suicidal gene therapy).

Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to 24 months.
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20°C. Generally, these will be useable for up to one month. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.