title: Contraceptive efficacy and safety of a monophasic oral contraceptive containing 150 micrograms desogestrel and 30 micrograms ethinyl estradiol: United States clinical experience using a "Sunday start" approach.
abstract: OBJECTIVE
  To report on experience in the United States with a monophasic oral contraceptive (OC) containing 150 micrograms desogestrel and 30 micrograms ethinyl E2 (EE). The results of a multicenter evaluation of efficacy, cycle control, and safety over 6 months of exposure using a "Sunday start" regimen is evaluated.
  
  
  METHODS
  Multicenter.
  
  
  METHODS
  Open noncomparative study.
  
  
  METHODS
  Study subjects were a mean age of 25 years, and the majority were educated, nonobese, white, nulliparous, and previously had used OCs.
  
  
  METHODS
  A total of 809 women were exposed to study medication for a total of 4,096 cycles (equivalent to 341.3 women-years of use).
  
  
  RESULTS
  Efficacy was excellent. One user-failure pregnancy occurred (Pearl index 0.32); there were no method-failure pregnancies. Study medication was well tolerated; 6.6% of the subjects discontinued treatment because of drug-related adverse events. The study medication exhibited no adverse effects on blood pressure, body weight, or laboratory variables. Cycle control was evaluated in 697 subjects. In a total of 3,640 cycles, the incidences of intermenstrual bleeding, breakthrough bleeding, breakthrough spotting, and absence of withdrawal bleeding were 9.8%, 1.7%, 8.1%, and 1.4%, respectively, indicating appropriate cycle control. Patient acceptability was high; seven subjects (1%) discontinued the study because of menstrual irregularity (metrorrhagia).
  
  
  CONCLUSIONS
  The results of this study, comparable to those demonstrated in a recent European multicenter study, add further documentation to the published data on the safety, efficacy, cycle control, and acceptability of this monophasic desogestrel-containing combined OC using a "Sunday start" approach.
authors.affiliation: Women's Medical and Diagnostic Center, Gainesville, Florida 32607, USA.
authors.forename: M
authors.initials: M
authors.lastname: Notelovitz
mesh_terms: D000293:Adolescent; D000328:Adult; D003277:Contraceptives, Oral, Combined / Q000494:pharmacology*; D017135:Desogestrel / Q000008:administration & dosage* / Q000009:adverse effects; D004958:Estradiol / Q000008:administration & dosage* / Q000009:adverse effects; D005260:Female; D006801:Humans; D008597:Menstrual Cycle / Q000187:drug effects; D010349:Patient Compliance
chemical_list: D003277:Contraceptives, Oral, Combined; D004958:Estradiol; D017135:Desogestrel