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Information about Famciclovir
Famciclovir is a nucleoside analogue and antiviral agent used in therapy of herpes zoster and simplex virus infections. Famciclovir is associated with a low rate of mild-to-moderate serum ALT elevations during therapy, but has not been associated with instances of clinically apparent liver injury.
Mechanism of action of Famciclovir
Famciclovir (fam sye' kloe vir) is an acyclic purine nucleoside analogue with antiviral activity against many herpes viruses, including herpes simplex 1 and 2, cytomegalovirus, Ebstein-Barr virus and varicella-zoster. Famciclovir is a prodrug of penciclovir which is the active component. After absorption, famciclovir is converted in the liver to penciclovir which is phosphorylated intracellularly by viral kinases; the resultant triphosphate competes with guanosine for incorporation into viral DNA, blocking viral DNA polymerase activity. Famciclovir is indicated for therapy of varicella zoster and for mucocutaneous or genital herpes simplex infections, both type 1 and 2.
FDA approval information for Famciclovir
Famciclovir was approved for use in the United States in 1994 and is widely used in treatment of herpes zoster and prophylaxis of genital and mucocutaneous herpes simplex infection. Famciclovir is available as tablets of 125, 250 and 500 mg, generically and under the brand name of Famvir. The recommended dose of famciclovir and duration of therapy varies by indication. The typical recommended oral dose for herpes zoster in adults is 500 three times daily for 7 days; a lower daily dose is recommended for prophylaxis. Side effects are uncommon but can include headache, dizziness, and gastrointestinal upset. Drugs for HIV Infection, in the Subclass Antiretroviral Agents
- Nonnucleoside Reverse Transcriptase Inhibitors (HIV)
- Nucleoside Analogues (HIV)
- Protease Inhibitors (HIV)
HCV NS5A Inhibitors
HCV NS5B Inhibitors (Polymerase inhibitors)
- Asunaprevir, Boceprevir, Glecaprevir, Grazoprevir, Paritaprevir, Simeprevir, Telaprevir, Voxilaprevir
Drugs for Herpes Virus
Drugs for Influenza