The 9th edition of this unparalleled work is now 25 percent larger, taking into account the rapidly increasing number of newly developed drugs. It now includes data on 20,000 drugs - 4,000 more than in the previous edition. Also new are the highlighted biopharmaceuticals, a more detailed and separate discussion of biological and biopharmaceutical information, plus an additional index for those drugs extracted from plants, animals or microorganisms. In addition, the synonym, group and CAS number indices makes drug search even easier and more efficient.