title: Aborted genital herpes simplex virus lesions: findings from a randomised controlled trial with valaciclovir.
abstract: OBJECTIVE
  In prospective trials, episodic valaciclovir significantly increased the chance of preventing or aborting the development of painful vesicular genital herpes simplex virus (HSV) lesions compared with placebo. We explored the clinical outcome of aborted lesions and its association with early treatment in a study designed to compare 3 and 5 days' treatment with valaciclovir.
  
  
  METHODS
  In a randomised controlled trial, valaciclovir 500 mg twice daily for 3 or 5 days was initiated at the first symptoms of a genital herpes outbreak. The primary end point was length of episode with pain, HSV shedding, and aborted lesions secondary end points. The effect of time from symptom recognition to treatment initiation on aborted lesions was assessed in a post hoc analysis.
  
  
  RESULTS
  In 531 patients, no differences were observed between 3 and 5 days' treatment in episode duration (median 4.7 v 4.6 days), loss of pain/discomfort (2.8 v 3.0 days), or lesion healing (4.9 v 4.5 days). Vesicular lesions were aborted in 27% of patients treated for 3 days v 21% of patients receiving valaciclovir for 5 days. The odds of achieving an aborted episode were 1.93 (95% CI: 1.28 to 2.90) times higher for those initiating treatment with valaciclovir within 6 hours of first sign or symptom.
  
  
  CONCLUSIONS
  There was no difference between 3 and 5 days' treatment in reducing episode duration or lesion abortion. Prompt treatment with valaciclovir can abort genital HSV reactivation episodes, preventing a vesicular outbreak. Maximum treatment benefit depends on prompt therapy after recognition of symptoms.
authors.affiliation: Department of Dermatology and Venereology, University Hospital, Uppsala, Sweden. anders.strand@medsci.uu.se
authors.forename: A
authors.initials: A
authors.lastname: Strand
authors.forename: R
authors.initials: R
authors.lastname: Patel
authors.forename: H C
authors.initials: HC
authors.lastname: Wulf
authors.forename: K M
authors.initials: KM
authors.lastname: Coates
mesh_terms: D000212:Acyclovir / Q000008:administration & dosage* / Q000031:analogs & derivatives*; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000998:Antiviral Agents / Q000008:administration & dosage*; D004311:Double-Blind Method; D005260:Female; D006558:Herpes Genitalis / Q000188:drug therapy*; D018258:Herpesvirus 2, Human / Q000187:drug effects; D006801:Humans; D008297:Male; D008875:Middle Aged; D011355:Prodrugs / Q000008:administration & dosage*; D016896:Treatment Outcome; D000077483:Valacyclovir; D014633:Valine / Q000008:administration & dosage* / Q000031:analogs & derivatives*
chemical_list: D000998:Antiviral Agents; D011355:Prodrugs; D014633:Valine; D000077483:Valacyclovir; D000212:Acyclovir