title: Erythromycin in pityriasis rosea: A double-blind, placebo-controlled clinical trial.
abstract: BACKGROUND
  The study stemmed from an incidental observation of improvement in 2 patients with pityriasis rosea while receiving erythromycin.
  
  
  OBJECTIVE
  The purpose of the study was to evaluate the efficacy of erythromycin in patients with pityriasis rosea.
  
  
  METHODS
  A double-blind, placebo-controlled clinical study was performed in an outpatient setting in a major hospital. Ninety patients over a period of 2 years were alternatively assigned to treatment group or placebo group. Patients in the treatment group received erythromycin in divided doses for 14 days. The response was categorized as complete response, partial response, or no response. All patients were followed up for 6 weeks.
  
  
  RESULTS
  Both groups were comparable with regard to age at presentation, sex, and average duration of disease at the time of reporting to the clinic. Upper respiratory tract infection before the appearance of skin lesions was reported in 68.8% of all patients. Complete response was observed in 33 patients (73.33%) in the treatment group and none in the placebo group (P <.0001).
  
  
  CONCLUSIONS
  Oral erythromycin was effective in treating patients with pityriasis rosea.
authors.affiliation: Department of Dermatology, Dr Ram Manohar Lohia Hospital, New Delhi, India.
authors.forename: P K
authors.initials: PK
authors.lastname: Sharma
authors.forename: T P
authors.initials: TP
authors.lastname: Yadav
authors.forename: R K
authors.initials: RK
authors.lastname: Gautam
authors.forename: N
authors.initials: N
authors.lastname: Taneja
authors.forename: L
authors.initials: L
authors.lastname: Satyanarayana
mesh_terms: D000284:Administration, Oral; D000293:Adolescent; D000328:Adult; D000900:Anti-Bacterial Agents / Q000494:pharmacology / Q000627:therapeutic use*; D002648:Child; D002675:Child, Preschool; D004311:Double-Blind Method; D004917:Erythromycin / Q000494:pharmacology / Q000627:therapeutic use*; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D017515:Pityriasis Rosea / Q000188:drug therapy* / Q000473:pathology; D016896:Treatment Outcome
chemical_list: D000900:Anti-Bacterial Agents; D004917:Erythromycin