A number of side effects have been reported with Risperdal. In clinical studies, the most common side effects that were seen with the medicine included upper respiratory tract infections, drowsiness, and an increased appetite. Some of the potentially serious side effects of Risperdal that require immediate medical attention include rapid or excessive weight gain, suicidal thoughts, dizziness or fainting, and uncontrollable muscle
contractions.
In order to help minimize risks while taking Risperdal, make sure to talk to your healthcare provider before starting the drug if you have liver or kidney disease,
diabetes,
epilepsy, or
Alzheimer's disease (or other forms of
dementia). You should also tell your healthcare provider about all other medications you are currently taking.