The active ingredient of Virest brand is acyclovir. Acyclovir is an antiviral drug. It slows the growth and spread of the herpes virus in the body. Acyclovir will not cure herpes, but it can lessen the symptoms of the infection. The inhibitory activity of acyclovir is highly selective due to its affinity for the enzyme thymidine kinase (TK) encoded by HSV and VZV. This viral enzyme converts acyclovir into acyclovir monophosphate, a nucleotide analogue. The monophosphate is further converted into diphosphate by cellular guanylate kinase and into triphosphate by a number of cellular enzymes. In vitro, acyclovir triphosphate stops replication of herpes viral DNA. This is accomplished in 3 ways: 1) competitive inhibition of viral DNA polymerase, 2) incorporation into and termination of the growing viral DNA chain, and 3) inactivation of the viral DNA polymerase. The greater antiviral activity of acyclovir against HSV compared with VZV is due to its more efficient phosphorylation by the viral TK.
Virest is used to treat diseases such as: Cold Sores, Herpes Simplex, Herpes Simplex - Congenital, Herpes Simplex Encephalitis, Herpes Simplex, Mucocutaneous/Immunocompetent Host, Herpes Simplex, Mucocutaneous/Immunocompromised Host, Herpes Simplex, Suppression, Herpes Zoster, Infectious Mononucleosis, Mononucleosis, Ramsay Hunt Syndrome, Varicella-Zoster.
Possible side effects of Virest include: large hive-like swelling on face, eyelids, lips, tongue, throat, hands, legs, feet, sex organs; trembling; chills, fever, or sore throat; decreased consciousness; difficulty in breathing or swallowing; swelling of eyelids, face, feet, hands, lower legs or lips.
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