The list of Risperdal side effects is long. Some health problems can ultimately cause premature death. Therefore, it is imperative that the doctor and patient carefully weigh the benefits as opposed to the risks. For example, the nervous system can be compromised. Strokes and seizures can also create havoc with patient health. Diabetes is another illness than can make the rest of life miserable. In addition, Risperdal may adversely interact with the drugs already taken by the patient. Therefore, it is imperative to talk to the doctor about any Risperdal side effects, immediately! The drug is so powerful, your survival or that of someone you love may be uncertain.