An overnight pharmacist performs the same functions as a regular pharmacist, but outside of regular business hours. As an overnight pharmacist, you fill orders or prescriptions for patients and doctors. You handle medication and instruct patients on how to safely take their prescriptions. Working at a hospital pharmacy, your duties include working with doctors to create and adjust patient medication as needed. Your responsibilities also include filling orders for the following business day and keeping accurate records of all medications and prescriptions. You communicate with staff to ensure they are maintaining patient safety and efficient pharmacy operation.