Risperdal is the brand name for the atypical antipsychotic medication risperidone. It is primarily used to treat schizophrenia and to manage acute episodes of mania or depression in bipolar disorder. The drug works by blocking dopamine d2 receptors and serotonin 5-ht1a receptors in the brain. By antagonizing these receptors it reduces abnormal thought patterns and stabilizes mood. The dopamine blockade helps decrease hallucinations, delusions, and disordered thinking. The serotonin effect contributes to the regulation of mood and the prevention of manic symptoms. Together these actions provide symptomatic control of psychotic and mood disorders.

Risperdal is an atypical antipsychotic medication also known as risperidone. It is prescribed to manage symptoms of schizophrenia and to treat episodes of mania in bipolar disorder. Clinical use extends to reducing irritability associated with autism spectrum disorder. The drug works by blocking dopamine d2 receptors in the brain. It also blocks serotonin 5-ht2a receptors which enhances its antipsychotic effect. By modulating these receptors the medication alters neurotransmitter signaling that reduces delusions and hallucinations. This dual receptor antagonism leads to improved cognitive and emotional stability in patients.

Risperdal may cause drowsiness or fatigue in some patients. Weight gain can occur due to increased appetite. Dry mouth and mild constipation are also reported. Some individuals experience dizziness or light-headedness when standing up quickly. Blurred vision or sensitivity to bright light may be observed. Less commonly, mild tremors or muscle stiffness can appear. These effects are generally temporary and often improve with continued use.

Risperdal may cause drowsiness or sedation in some individuals. It can lead to weight gain due to changes in appetite. Some people experience dizziness or lightheadedness when standing up quickly. Constipation is a reported gastrointestinal side effect. The medication can increase prolactin hormone levels leading to menstrual irregularities or breast changes. Tremor or restlessness of the hands may also occur.