Trust this market-leading ratio and proportion text that's known for its realistic practice problems and unique "proof" step in the answer key that allows you to double-check your answers to avoid medication errors. This edition continues to promote critical thinking, clinical judgment, and patient safety with respect to accurate drug dosages. Helpful worksheets, assessment tests, and Clinical Alerts?call attention to situations in actual practice that have resulted in drug errors - giving you extensive hands-on practice for the Next Generation NCLEX^® and beyond.