Risperidone is an atypical antipsychotic that antagonizes 5HT2A and D2 receptors. Risperidone is used for many indications in children and adolescents. These indications include bipolar mania, schizophrenia, disruptive behaviour disorders, and aggression associated with autism spectrum disorder/mental retardation. Although it is usually well tolerated, weight gain, somnolence, rhinitis, headache, and rising appetite are among the most noticed side effects. Here we present a 5-year-old boy who developed diffuse nonpruritic maculopapular skin rash with a stable dosage of risperidone in the eighth month of treatment.