In psychiatry, Intramuscular (IM) injections play a crucial role in delivering medications directly into muscle tissue for various reasons. These include the need for rapid onset of action, situations where oral administration is not feasible, or when precise control over dosage and absorption is essential. Long-acting antipsychotic medications such as haloperidol decanoate, fluphenazine decanoate, and risperidone microspheres are examples of formulations tailored for IM administration. They are typically prescribed for patients with schizophrenia or other psychotic disorders who face challenges with oral medications or require consistent therapeutic blood levels.