Pharmacy (from the Greek φάρμακον = drug) is the health profession that links the health sciences with the chemical sciences, and it is charged with ensuring the safe use of medication. The scope of pharmacy practice includes more traditional roles such as compounding and dispensing medications, and it also includes more modern services related to patient care, including clinical services, reviewing medications for safety and efficacy, and providing drug information. Pharmacists, therefore, are experts on drug therapy and are the primary health professionals who optimize medication use to provide patients with positive health outcomes. The term is also applied to an establishment used for such purposes. The Philadelphia College of Pharmacy and Science was founded in 1821, the first school of its kind in the United States. The American Pharmaceutical Association was formed in 1851.