famciclovir, Famvir

  • Pharmacy Author:
    Omudhome Ogbru, PharmD

    Dr. Ogbru received his Doctorate in Pharmacy from the University of the Pacific School of Pharmacy in 1995. He completed a Pharmacy Practice Residency at the University of Arizona/University Medical Center in 1996. He was a Professor of Pharmacy Practice and a Regional Clerkship Coordinator for the University of the Pacific School of Pharmacy from 1996-99.

  • Medical and Pharmacy Editor: Jay W. Marks, MD
    Jay W. Marks, MD

    Jay W. Marks, MD

    Jay W. Marks, MD, is a board-certified internist and gastroenterologist. He graduated from Yale University School of Medicine and trained in internal medicine and gastroenterology at UCLA/Cedars-Sinai Medical Center in Los Angeles.

What is the dosage for famciclovir?

Famciclovir may be taken with or without food. The recommended doses are:

  • Recurrent genital herpes: 1,000 mg every 12 hours for one day.
  • Recurrent cold sores: 1,500 mg as a single dose.
  • Suppression of recurrent genital herpes: 250 mg twice daily.
  • Shingles: 500 mg every 8 hours for 7 days.
  • HIV-infected patients (cold sores or genital herpes): 500 mg twice daily for 7 days.

Which drugs or supplements interact with famciclovir?

Probenecid (Benemid) may reduce the kidney's removal of famciclovir leading to higher concentrations of famciclovir in the blood. This may lead to side effects from famciclovir.

Medically Reviewed by a Doctor on 9/11/2015

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