Risperidone long-acting injections are usually given once a month. Risperidone long-acting injection works to treat schizophrenia by releasing risperidone continuously through a type of sustained-release delivery system, and the effects of the medication typically last for up to one month with one injection. Adverse reactions such as respiratory infections, amenorrhea, neutropenia, depression, sensory abnormalities, and vertigo are possible with the use of this medication, and it is also important to note that it should be used with caution in patients with Parkinson’s syndrome and epilepsy, and that the dosage should be reduced appropriately in the elderly and patients with cardiac, hepatic, and renal disorders, and that it should be contraindicated for women who are pregnant and breastfeeding. For patients with schizophrenia, it is recommended that they visit a brain hospital or hospital psychiatry department. The drug needs to be used under the guidance of a doctor and should not be used blindly.