title: Famciclovir: a focus on efficacy and safety.
abstract: BACKGROUND
  Famciclovir is the prodrug of penciclovir, a guanosine analogue that inhibits viruses of the alpha sub-family of the Herpesviridae, as well as hepatitis B virus. It is indicated for management of mucocutaneous herpes simplex virus disease and acute herpes zoster, and has been investigated for management of hepatitis B virus infection.
  
  
  METHODS
  Data for this review were identified by searches of papers published in English on Medline and Scopus, spanning the years 1975 through 1 February 2010 with the key words: 'famciclovir', 'famvir', 'penciclovir', 'herpes', 'oral', 'genital', 'varicella', 'zoster' and 'virus' in association with 'safety', 'toxicity', 'tolerability', 'efficacy' and 'indications'. Relevant references were also obtained from articles acquired through the search strategy.
  
  
  RESULTS
  Readers are also provided with up-to-date information on the use of famciclovir for infections due to herpes simplex, varicella zoster and hepatitis B viruses. Clinical data pertaining to the safety and tolerability of famciclovir are also reviewed.
  
  
  CONCLUSIONS
  Famciclovir is a safe, convenient, and well-tolerated drug when used for its approved indications. The most common side effects indicated in the majority of studies were headache and nausea. Data for its use in childhood and pregnancy are limited.
authors.affiliation: Sunnybrook Health Sciences Centre and Research Institute, Division of Infectious Diseases, Department of Medicine, University of Toronto, Toronto, ON, M4N 3M5, Canada. samira.mubareka@sunnybrook.ca
authors.forename: Samira
authors.initials: S
authors.lastname: Mubareka
authors.forename: Victor
authors.initials: V
authors.lastname: Leung
authors.forename: Fred Y
authors.initials: FY
authors.lastname: Aoki
authors.forename: Donald C
authors.initials: DC
authors.lastname: Vinh
mesh_terms: D015075:2-Aminopurine / Q000009:adverse effects / Q000031:analogs & derivatives* / Q000493:pharmacokinetics / Q000494:pharmacology / Q000627:therapeutic use; D000998:Antiviral Agents / Q000009:adverse effects / Q000493:pharmacokinetics / Q000494:pharmacology / Q000627:therapeutic use*; D000077595:Famciclovir; D005260:Female; D006509:Hepatitis B / Q000188:drug therapy*; D006515:Hepatitis B virus / Q000187:drug effects; D006566:Herpesviridae Infections / Q000188:drug therapy*; D014645:Herpesvirus 3, Human / Q000187:drug effects; D006801:Humans; D008297:Male; D011247:Pregnancy; D011251:Pregnancy Complications, Infectious / Q000188:drug therapy; D018139:Simplexvirus / Q000187:drug effects; D016896:Treatment Outcome
chemical_list: D000998:Antiviral Agents; D015075:2-Aminopurine; D000077595:Famciclovir