Irritability and emotional dysregulation are common among autistic children. This systematic review found that antipsychotic medications, especially Risperidone and Aripiprazole, are useful treatments.  It also found that efficacy was lower in the context of comorbid epilepsy.

de Pablo, G. S., Jordá, C. P., Vaquerizo-Serrano, J., Moreno, C., Cabras, A., Arango, C., … & Parellada, M. (2022). Systematic Review and Meta-analysis: Efficacy of Pharmacological Interventions for Irritability and Emotional Dysregulation in Autism Spectrum Disorder and Predictors of Response. Journal of the American Academy of Child & Adolescent Psychiatry.

https://www.jaacap.org/article/S0890-8567(22)00198-8/fulltext?dgcid=raven_jbs_aip_email