Overview "As Required" Oral Sildenafil in Raynaud's Phenomenon Status: Completed Trial end date: 2015-05-01 Target enrollment: Participant gender: Summary The purpose of this study is to determine whether "on-demand" sildenafil is effective in the treatment of Raynaud's phenomenon. Phase: Phase 2/Phase 3 Details Lead Sponsor: University Hospital, GrenobleTreatments: Sildenafil Citrate