This document summarizes different types of patients and pharmacy services in a hospital setting. It describes outpatients as patients who visit the hospital for less than 24 hours or on an outpatient basis. Inpatients, in contrast, stay overnight or for an extended period in the hospital. The document then outlines various outpatient and inpatient pharmacy services, including dispensing prescriptions, maintaining records, and providing drug consultations for outpatients or ensuring inpatients receive the correct medications. It also summarizes different systems for dispensing drugs to inpatients, such as individual prescriptions, floor stock, unit dose, and combinations of these approaches.