infection (oral, 2% to 8% ; IM, 2% and 6%) Fatigue (oral, adult, 1% to 3%; pediatric, 18% to 42% ; IM, 3% to 9%) Generalised pains (IM, 1% to 4%) Gynecomastia Galactorrhea Retrograde ejaculation Note: The percentage provided next to the adverse effect is the incidence of that adverse effect according to DrugPoint. Rare adverse effects (but not necessarily causally related) Rare adverse effects of risperidone, occurring less than 1%, include: Prolonged QT interval Sudden cardiac death Syncope (oral, up to 1% ; IM, up to 2%) Diabetic ketoacidosis Hypothermia Pancreatitis Agranulocytosis Neutropenia Leukopenia Thrombocytopenia Thrombotic thrombocytopenic purpura Stroke (oral, less than 5% ; IM, less than 4%) Seizure (oral, 0.3% ; IM, 0.3%) Tardive dyskinesia (oral, less than 5% ; IM, less than 4%) Priapism Pulmonary embolism Neuroleptic malignant syndrome (oral, adults, less than 1%; pediatrics, less than 5%) Anorexia Hypoaesthesia Impaired concentration Sexual dysfunction Angioedema Intestinal obstruction Megacolon Oedema Hyponatraemia Note: The percentage provided next to the adverse effect is the incidence of that adverse effect according to DrugPoint. References Risperidone