Overview MK0928 Study in Adult Patients With Primary Insomnia (0928-040)(COMPLETED) Status: Completed Trial end date: 2006-10-01 Target enrollment: Participant gender: Summary A study to evaluate the efficacy, safety and tolerability of MK-0928 in Primary Insomnia. Phase: Phase 2 Details Lead Sponsor: H. Lundbeck A/STreatments: Gaboxadol