Hospital pharmacists work in a hospital and are responsible for preparing prescriptions for patients, administering medications, maintaining their drug charts and advising them on medication dosage and its adverse effects.They also have to maintain optimal inventory levels and comply with FDA, DEA and other regulations. Clinical pharmacists work in medical clinics and hospitals and participate in direct patient care in collaboration with physicians and other health care staff. They are responsible for performing medical tests, monitoring that patients receive the correct treatment and following patient health progress.