Learn to calculate drug dosages accurately with this practical workbook-textbook! Calculation of Drug Dosages: A Work Text, 12th Edition makes it easy to understand and master the three major methods of dosage calculation - ratio and proportion, formula, and dimensional analysis. A basic review of mathematics refreshes your math skills, and practice problems, worksheets, and practice tests help you gain confidence in making drug calculations. New to this edition are Next Generation NCLEX ® (NGN) practice problems preparing you for the critical thinking questions on the NGN exam. Written by nursing experts Sheila Ogden and Linda Fluharty, this worktext is ideal for nursing students and for nurses returning to practice!