A new edition of this standard text book after six years is most welcome. The author has presented a change throughout in keeping with advances made in this field. These changes have been extensive, and the revisions have been adequate to cover them all. The format of the new edition features a double column page to facilitate reading. The author is Professor Emeritus of Pharmacology and Materia Medica, School of Medicine, Western Reverse University. Changes in the United State Pharmacopoeia, 13th revision, are included in the text. The book continues to be an essential reference book.