Dermatologic Manifestations of Herpes Simplex Medication
- Author: Joseph S Eastern, MD; Chief Editor: Dirk M Elston, MD more...
Medication Summary
Acyclovir is an analog of 2'-deoxyguanosine and, along with other nucleoside analogs listed below, remains the drug of choice for herpes simplex virus (HSV) infections. Antibiotics may be used if a secondary bacterial infection develops.
Antiviral agents
Class Summary
Nucleoside analogs are initially phosphorylated by viral thymidine kinase to eventually form a nucleoside triphosphate. These molecules inhibit HSV DNA polymerase with 30-50 times the potency of human alpha-DNA polymerase.
Acyclovir topical
Inhibits activity of both HSV-1 and HSV-2. Patients experience less pain and faster resolution of cutaneous lesions when used within 48 h from rash onset. May prevent recurrent outbreaks.
Has been proven to be safe and effective in preventing neonatal HSV and in eliminating the need for cesarean deliveries.
Penciclovir (Denavir)
Topical formulation. For use in mild recurrent herpes labialis. Inhibitor of DNA polymerase in HSV-1 and HSV-2 strains, inhibiting viral replication.
Famciclovir (Famvir)
Prodrug that, when biotransformed into its active metabolite penciclovir may inhibit viral DNA synthesis/replication.
Valacyclovir (Valtrex)
Prodrug rapidly converted to the active drug acyclovir. More expensive but has a more convenient dosing regimen than acyclovir.
Foscarnet (Foscavir)
Organic analog of inorganic pyrophosphate that inhibits replication of known herpesviruses, including CMV, HSV-1, and HSV-2. Inhibits viral replication at pyrophosphate-binding site on virus-specific DNA polymerases. Poor clinical response or persistent viral excretion during therapy may be due to viral resistance. Patients who can tolerate foscarnet well may benefit from initiation of maintenance dose of 120 mg/kg/d early in treatment. Individualize dosing based on renal function status.
Cidofovir (Vistide)
Approved for treatment of CMV retinitis. Compounded cream/gel (not FDA approved but recommended by CDC) can be used for localized acyclovir-resistant HSV.
Docosanol cream 10 % (Abreva)
Used for HSV-1 infections. Prevents viral entry and replication at cellular level. Use at first sign of cold sore or fever blister.
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