This article is devoted to the Derivation and formation features of pharmacological terminology. Pharmacological terminology is one of the specific strata of vocabulary that occupies a special place in the language system, which is explained by its structural-semantic, word-formation and stylistic features. In recent decades, there has been an acceleration in the process of internationalization of pharmacological terminology. The source of internationalization in the terminological system of medicine is the morphemes of classical languages ​​such as Latin and Greek; previously borrowed general literary words and then terminologically rethought and borrowing finished terminological units. For the vast majority of European languages, this source is mainly English pharmacological terminology and contain approximately more than 10 000 terms.