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Background: Adhesive capsulitis of the shoulder is a pathological process in which excessive adhesions and fibrous tissue are formed across the glenohumeral joint, resulting in gradually restricted shoulder movements, dysfunction, and pain.Aim: To analyze the efficacy of corticosteroid injection applied in cases with 1ry adhesive capsulitis and to compare the clinical results achieved with those achieved in cases given oral NSAIDs.Materials and methods: This meta-analysis was conducted on 4 investigations according to the guidelines by the Cochrane Collaboration reporting followed the PRISMA statement (Preferred Reporting Items for Systematic Reviews and Meta-analyses).Results: Two studies reported (follow up internal rotation) and all can be used. A significant heterogeneity was observed. Therefore, a random-effect model has been utilized for analysis (I² = 100%, P<0.001). The combined mean difference and 95% CIs was 1.68 (1.47 to 1.89). The combined result demonstrates highly statistically significant difference between groups regarding (follow up internal rotation) (Z = 15.65, P ˂0.001). Two studies reported (follow up external rotation) and all can be used. A non-significant heterogeneity was observed. Therefore, a random-effect model was utilized for analysis (I² = 0%, P=0.89). The combined mean difference and 95 % CIs was 1.30 (0.79 to 1.82). The combined result demonstrates highly statistically significant distinction among groups regarding (monitoring external rotation) (Z = 4.99, P ˂0.001).Conclusion: Corticosteroid injection performed results in better outcome compared with oral NSAIDs in cases with adhesive capsulitis. More high-quality well-designed trials are required.