Risperidone, sold under the brand name Risperdal among others, is an antipsychotic. It is used to treat schizophrenia, bipolar disorder, and irritability associated with autism. It is taken either by mouth or by injection into a muscle. The injectable version is long-acting and lasts for about two weeks. Information about the drug risperidone (Risperdal, Risperdal Consta) prescribed for bipolar mania, schizophrenia, stuttering, Tourette's syndrome, and OCD (obsessive compulsive disorder). Read about Risperdione, a medication that works in the brain to treat schizophrenia. Risperdal Consta (risperidone) is an antipsychotic medication. It works by changing the effects of chemicals in the brain. Risperdal Consta is a long-acting injection used to treat schizophrenia and symptoms of bipolar disorder (manic depression). For risperidone-naïve patients, it is recommended to establish tolerability with oral risperidone prior to initiating treatment with RISPERDAL CONSTA (see section 4.2). Risperidone is used to treat certain mental/mood disorders (such as schizophrenia, bipolar disorder, irritability associated with autistic disorder). Learn about switching patients from antipsychotics, like risperidone and paliperidone, to INVEGA SUSTENNA® (paliperidone palmitate), and other important dosage information for starting patients on INVEGA SUSTENNA®. See full prescribing & safety info, including boxed warning. 10903 New Hampshire Avenue Silver Spring, MD 20993 Ph. 1-888-INFO-FDA (1-888-463-6332) Contact FDA Schizophrenia. The recommended dose for the treatment of schizophrenia is 25 mg IM every 2 weeks. Although dose response for effectiveness has not been established for RISPERDAL CONSTA ®, some patients not responding to 25 mg may benefit from a higher dose of 37.5 mg or 50 mg. Risperidone is practically insoluble in water, freely soluble in methylene chloride, and soluble in methanol and 0.1 N HCl. RISPERDAL® CONSTA® (risperidone) Long-Acting Injection is a combination of extended-release microspheres for injection and diluent for parenteral use.