Risperidone mesylate is primarily used in the treatment of psychiatric conditions, particularly schizophrenia and bipolar disorder. It helps manage symptoms such as hallucinations, delusions, and mood swings by balancing certain neurotransmitters in the brain. Additionally, it is effective in reducing irritability and aggression in individuals with autism spectrum disorders. The mesylate salt form enhances its solubility and stability, making it suitable for various pharmaceutical formulations, including oral solutions and injectables. Its application extends to both acute and long-term management of mental health conditions, improving overall quality of life for patients.