Hi Risperidone (Schizodon) is known to cause many of these symptoms. Children have sleep problems, frequent urination, weight gain etc. Feeling hot is also seen. But I would suggest that you see your Psychiatrist once gain and discuss these issues with him. If adverse effects are more than the benefits- its better to stop the medications. Hope other modalities of management like behavioural therapy are also being done. Medications for autism are indicated only for specific indications. Hope my answer helps you. Wish your son good health.