Risperidon is a medication primarily used to treat mental health conditions such as schizophrenia and bipolar disorder. It belongs to a class of drugs known as atypical antipsychotics, which work by balancing certain chemicals in the brain to help improve mood, thoughts, and behavior. This medication can also be prescribed for irritability associated with autism spectrum disorder. Common side effects may include drowsiness, weight gain, and increased appetite. It is important for patients to follow their healthcare provider's instructions and report any unusual symptoms while taking risperidon.