IRCT2013031212781N1 IRCT 2013-05-05 Ahvaz Jundishapur University of Medical Sciences Vice of Research And Technology Prophylactic Effect of Greater Occipital Nerve Block on intensity and frequency of Migraine Headaches GONB Prophylactic Effect of Greater Occipital Nerve Block on intensity and frequency of Migraine Headaches 2013-01-20 anticipated 40 Complete https://irct.ir/trial/12769 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment. N/A migraine. Intervention 1: 1 mL 2% lidocaine plus 0.5 mL 40 mg triamcinolone injected to each Greater Occipital Nerve at the medial third of the distance between the occipital protuberance and the mastoid process. Inderal Tablets are also prescribed as 20 mg twice daily. Intervention 2: 1 mL 2% lidocaine plus 0.5 mL saline injected at the same sites bilaterally. Inderal Tablets are also prescribed as 20 mg twice daily.