In its updated Fourth Edition, this text presents essential pharmacology concepts in a streamlined, user-friendly fashion. Organized by body system, the book explains the rationale for each drug class's therapeutic actions, contraindications, and adverse effects.Each chapter opens with learning objectives and ends with NCLEX®-style and other questions. Illustrations, tables, side bars, and boxes summarize concepts and focus attention on critical thinking, patient safety, evidence-based practice, lifespan issues, patient teaching, and case study-based critical thinking exercises.A bound-in CD-ROM contains over 700 patient teaching printouts, Canadian drug regulations, a video on medication administration, NCLEX®-style questions, and additional learning tools.