Overview Evaluation of the Index of Sexual Life Questionnaire Status: Completed Trial end date: 1969-12-31 Target enrollment: Participant gender: Summary The purpose of the study is to assess the sensibility of the ISL questionnaire. Phase: Phase 4 Details Lead Sponsor: PfizerPfizer's Upjohn has merged with Mylan to form Viatris Inc.Treatments: Sildenafil Citrate