Calculating Drug Dosages 3rd edition by Castillo

Calculating Drug Dosages, 3rd Edition by Castillo helps nursing and allied health students build accuracy and confidence with medication math. The text reviews essential arithmetic, measurement systems, conversions, dosage formulas, and methods for oral, parenteral, pediatric, and intravenous calculations. Step-by-step explanations and practice-oriented examples support learners as they move from basic concepts to clinical application. Published by F.A. Davis, this edition emphasizes safe calculation habits, clear problem setup, and checking work, making it a practical resource for courses that prepare students to administer medications responsibly.