One of the most notable contributors to pharmacology was Galen, a physician in the Roman Empire, wrote on theories of drug action. Galen’s theories were later recorded, simplified, and translated by Arabic scholars, notably Hunayn ibn Ishak. Because of the need for the works to be translated from Greek to Arabic, there is a lot of documentation available regarding the naming of drugs. Authors such as Abulcasis and Maimonides, went into detail on this aspect and discussed the naming of drugs including the linguistics, as well as the synonyms and explanations behind the name given to the drug. Avicenna also contributed to the naming and categorization of drugs. In his Cannon of Medicine, he explained medicine types such as antiseptics and narcotics as well as explained the forms such as tablets, powers, and syrups.