Pharmacists are healthcare professionals who practice in the field of pharmacy. They are knowledgeable about drug therapy, different types of drugs (their composition, manufacturing process and properties) and optimum use of drugs (depending upon the condition of the patient). Pharmacists are also known by titles such as- druggists, chemists and Doctor of Pharmacy. Their main tasks include- compounding, checking prescriptions, dispensing drugs, advice dosage and directions to patients and checking and maintaining the drug store inventory (at hospitals, clinics or drug stores).