A 약사 (Pharmacist) is a healthcare professional who specializes in the preparation, dispensing, and appropriate use of medications. They play a crucial role in patient care by ensuring that prescriptions are filled accurately and advising patients on the proper use of their medications. In addition to dispensing drugs, 약사 also provide information about potential side effects, drug interactions, and overall medication management. They often work in various settings, including hospitals, community pharmacies, and clinics, collaborating with other healthcare providers to optimize patient health outcomes.