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. Risperidone is an atypical antipsychotic drug that is used for treating schizophrenia, bipolar mania, and autism. Other atypical antipsychotic drugs include olanzapine , quetiapine , ziprasidone , aripiprazole and paliperidone (Invega). RISPERIDONE is an antipsychotic. It is used to treat schizophrenia, bipolar disorder, and some symptoms of autism. The lowest GoodRx price for the most common version of risperidone is around $4.00, 94% off the average retail price of $74.68. This work was supported by NIH Grants RO1MH61887, U19MH82441, the NIMH Psychoactive Drug Screening Program Contract and the Michael Hooker Chair for Protein Therapeutics and Translational. Risperidone is an antipsychotic medicine that works by changing the effects of chemicals in the brain. Risperidone is used to treat schizophrenia in adults and children who are at least 13 years old. Before taking risperidone. Some medicines are not suitable for people with certain conditions, and sometimes a medicine may only be used if extra care is taken. By deep intramuscular injection. For Adult. Initially 25 mg every 2 weeks, to be administered into the deltoid or gluteal muscle, adjusted in steps of 12.5 mg (max. per dose 50 mg every 2 weeks) at intervals of at least 4 weeks, during initiation risperidone by mouth may need to be continued for 4–6 weeks; risperidone by mouth may also be. Definition Risperidone is classified as an atypical antipsychotic drug. It is sold in the United States under the brand name of Risperdal. Risperidone is used to treat the symptoms of schizophrenia (a mental illness that causes disturbed or unusual thinking, loss of interest in life, and strong or inappropriate emotions) in adults and teenagers 13 years of age and older. Learn about Risperdal (Risperidone) may treat, uses, dosage, side effects, drug interactions, warnings, patient labeling, reviews, and related medications.