Covering the ratio and proportion method of drug calculations, "Drug Calculations: Ratio and Proportion Problems for Clinical Practice, 9th Edition" provides clear, step-by-step explanations and concise examples to ensure safety and accuracy. Unique to this book, a "proof" step in the answer key lets you double-check your calculation results to avoid medication errors. Safety is also addressed through the inclusion of Quality & Safety Education for Nurses (QSEN) information and with features such as Clinical Alerts and High Alert drug icons calling attention to situations in actual practice that have resulted in drug errors. Written by Meta Brown Seltzer and Joyce Mulholland, this text includes extensive hands-on practice with calculation problems, critical thinking exercises, worksheets, and assessment tests. And to boost your proficiency, a companion Evolve website adds more than 600 additional practice problems.