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Of all the health professions, pharmacy is probably the most calculation intensive. Written in easy to understand language and emphasizing practical calculations that pharmacists do every day, this work highlights for students the relevance of calculations to pharmacy practice. A structured, five-lesson design provides numerous practical examples and problems, enabling instructors to extract material that complements their classroom presentations and students to use the book at their own pace in preparing for the national pharmacy licensure examination. The five lessons consist of: things to memorize, such as weights and measures; understanding expressions of drug amounts, such as units, parts, concentration; calculations used when compounding medications, such as proportional calculations and determination of osmolarity; calculations used to determine patient-specific doses, such as body weight considerations and body surface area; and parental nutrition calculations, such as components of TPN and mixing TPNs using the traditional method.