Overview Greater Occipital Nerve (GON) Block Effectivity in the Treatment of Chronic Migraine: 6 Months Follow up Status: Withdrawn Trial end date: 2018-07-01 Target enrollment: Participant gender: Summary This study evaluates effectiveness of greater occipital nerve blocks with bupivacaine compared to placebo in chronic migraine patients. Phase: Phase 4 Details Lead Sponsor: Bozok UniversityTreatments: Bupivacaine