This popular dosage calculation work-text helps students master the critical skills necessary to competently and confidently calculate drug dosages. Innovative and practical, it includes information on the ratio and proportion, formula and dimensional analysis methods of drug calculation, and numerous practice problems to accompany these methods. Ideal for students who need an extensive math review in addition to drug calculations content, this new edition features a more logical organization, a new chapter addressing medication administration to critically ill patients, and more practice problems on calculations for pediatric patients.