Hello my father 85 yrs male stopped taking risperidone he is getting sick now what are withdrawal symptoms and when does it wear-off?

Dyskinesias, anxiety, restlessness, sweating, tremors, abdominal pain, heart palpitations, headache, and increased blood pressure. Risk of developing neuroleptic malignant syndrome, rare but a deadly condition. Besides neuroleptic malignant syndrome which requires acute hospital care, all these other symptoms should be resolved by 3-5 days.

Risperidone is not an addictive medicine, so there are no withdrawal symptoms. As the level of the medicine is reduced in his system the original symptoms of his disorder may return, and this may include somatic symptoms, delusions, behavioral concerns, and deep depressive psychosis. I would recommend attention from his doctor. Risperidone is not well tolerated by some his age.