Other common side effects included dry risperdal kjope risperdal mouth, sleepiness, constipation, decreased appetite, and, increased sweating. RISPERDAL risperidone is not approved for the treatment of patients with dementia-related psychosis. Some side effects seen with these medications include the absence of menstrual breasts producing the development of breasts by and the inability to achieve an erection. Serum testosterone and sperm parameters partially recovered, but remained decreased after treatment was discontinued. RISPERDAL may affect your driving therefore, do not drive or operate machinery before talking to your healthcare professional. Carbamazepine and Other Enzyme Inducers In drug interaction study in schizophrenic patients, 11 subjects received risperidone titrated to mg day for weeks, followed by concurrent administration of carbamazepine for an additional weeks.