An Efficacy and Safety Study of Long Acting Injectable Risperidone and Oral Risperidone in Participants With Schizophrenia or Schizoaffective Disorder

Risperidone long acting injectables will be administered intramuscularly (given into the skin) at a flexible dose of 25, 37.5 or 50 milligram (mg) every 2 weeks up to Week 52. A supplementary oral antipsychotic will also be administered for 3-4 weeks after the initial dose of injection.

Risperidone tablets will be administered orally as 0.5-10 mg daily up to Week 52.