Teva Pharmaceutical, based in Israel, is the leading generic drug manufacturer in the world. Teva derives half of its sales from North America and makes up a high-single-digit percentage of the total number of generic prescriptions in the US. It also has a significant presence in Europe, Japan, Russia, and Israel. Besides generics, Teva has a portfolio of innovative medicines and biosimilars in three main therapeutic areas: the central nervous system with Copaxone, Ajovy, and Austedo; respiratory with Qvar and ProAir; and oncology with Truxima, Herzuma, and Bendeka/Treanda. Teva also sells active pharmaceutical ingredients, offers contract manufacturing services, and owns Anda, a US-based generic and specialty drug distributor.