Waller's Medical Pharmacology and Therapeutics, 7th Edition, gives medical, biomedical and healthcare students clear, up-to-date guidance on pharmacology and drug prescribing, supporting your studies and preparation for qualifications such as the Prescribing Safety Assessment (PSA). It provides thorough coverage of the pathogenic mechanisms of disease, drug actions, unwanted effects, and the therapeutic principles of drug use—all while taking a helpful, systems-based approach that orders information according to body systems and disease areas rather than by drug class.