Clayton's Basic Pharmacology for Nurses 19th Edition by Michelle J. Willihnganz, Samuel L. Gurevitz, and Bruce D. Clayton provides a practical introduction to pharmacology with a strong emphasis on safe medication administration and nursing care. The book explains fundamental principles of drug action, pharmacokinetics, dosage and administration, patient assessment, therapeutic outcomes, adverse effects, and nursing considerations while covering medications that affect the nervous, cardiovascular, respiratory, digestive, endocrine, reproductive, and other body systems. This edition includes updated information on commonly prescribed and newly approved medications, unfolding clinical case studies, and Next Generation NCLEX-style questions designed to strengthen clinical judgment. Its nursing-process approach helps students connect pharmacological knowledge with real patient-care situations, making it especially useful for nursing students preparing for coursework, clinical practice, and licensure examinations.