Overview Efficacy Study of EVT 201 to Treat Insomnia Status: Completed Trial end date: 2007-04-01 Target enrollment: Participant gender: Summary The purpose of this study is to determine whether a compound known as EVT 201 is effective in treating people diagnosed with primary insomnia ( difficulty sleeping with no other significant contributing factor, such as depression). Phase: Phase 2 Details Lead Sponsor: Evotec Neurosciences GmbH