https://www.selleckchem.com/ ges to the Keele STarT MSK tool and matched treatment options, targeting the COM-B model constructs, and these have been implemented in the current main trial. TRIAL REGISTRATION ISRCTN 15366334.BACKGROUND Galcanezumab is a novel monoclonal antibody that target to calcitonin gene-related peptide (CGRP). It has been tested for the preventive treatment of migraine and episodic cluster headache by multiple randomized clinical trials (RCTs) and have been found to reduce headache frequency. METHODS We systematically searched PubMed and Embase on Cochrane Central Register of Controlled Trials (CENTRAL) from the earliest date to August 1, 2019. Relative risk (RR) and weighted mean difference (WMD) were used to evaluate clinical outcomes. RESULTS Seven studies were pooled with 3889 patients. Subcutaneous injection of Galcanezumab at 120 mg, 240 mg leads to a statistically significant response rate for the treatment of migraine compared with placebo (120 mg RR = 1.51; 95% CI, 1.33 to 1.70; P  less then  0.001; 240 mg RR = 1.58; 95% CI, 1.43 to 1.76; P  less then  0.001). Among them, 120 mg group has the same treatment efficacy with 240 mg group (50% response RR = 1.06; 95% CI, 0.92 to 1.22; P = 0.425; 75% response RR = 1.07; 95% CI, 0.94 to 1.23; P = 0.301; 100% response; RR = 1.06; 95% CI, 0.81 to 1.37; P = 0.682; MHD RR = - 0.08; 95% CI, - 0.55 to - 0.40; P = 0.748) while related to a lower risk for adverse events for the treatment of migraine (120 mg RR = 1.06; 95% CI, 0.99 to 1.14; P = 0.084; 240 mg RR = 1.17; 95% CI, 1.09 to 1.25; P  less then  0.001). 300 mg per month galcanezumab is effective for the prevention of episodic cluster headache measured by at least 50% reduction of cluster headache frequency at week 3 (RR = 1.36; 95% CI, 1.00-1.84; P = 0.048). CONCLUSIONS Use of galcanezumab is related to a significantly reduced monthly headache frequency compared with placebo for the treatment of migraine and episodic cluster headache, 120 mg