Objectives: Disruptive mood dysregulation disorder (DMDD) is a relatively new diagnosis that comprises severe, nonepisodic irritability and recurrent outbursts of emotional instability in adolescents. This meta-analysis examined the efficacy of the available pharmacological and nonpharmacological interventions for DMDD. Methods: Literature searches were conducted in July 2023. To determine relevant articles, 330 abstracts were reviewed, and 39 articles were identified for full review. A random-effects model was used for the meta-analysis, and a subgroup analysis was performed to assess the effects of study design and intervention type. Results: Eleven studies were reviewed, including six pharmacological and five nonpharmacological. Despite high heterogeneity in effects (I2 = 85%), we showed statistically significant improvements in irritability symptoms following intervention. We showed statistically significant enhancements in symptoms of irritability following the intervention. The subgroup analysis revealed that, compared with randomized controlled trials (RCTs), open trials showed significant improvements in irritability. In addition, drug intervention significantly improved irritability compared to nondrug interventions. Atomoxetine (ATX), optimized stimulants, and stimulants combined with other drugs and behavioral therapy effectively improved irritability. Conclusions: With research indicating potential benefits for irritability from a combination of pharmacological interventions and therapy, including ATX, stimulants in conjunction with antipsychotic or antidepressant medications, and cognitive-behavioral techniques such as Dialectical Behavior Therapy for Children. Future large-scale RCTs are essential to further explore and refine these treatment approaches, especially focusing on the efficacy of combining pharmacological with effective nonpharmacological to improve irritability and overall outcomes in this population.
Keywords: disruptive mood dysregulation disorder; irritability; pharmacological interventions; psychosocial interventions.