Using a straightforward, real-life approach, this book focuses on mathematical calculations used in the clinical setting. It provides coverage of the ratio and proportion and formula methods of drug calculation. Common medications and methods of administration are used, including examples such as syringe usage, oral and parenteral medications, and medication reconstitution. Other examples, such as insulin, heparin, and intake and output, apply to specific patient populations. The math review sections build a strong foundation with hundreds of practice problems. To minimize medication errors, current safety recommendations from the Joint Committee on Accreditation of Healthcare Organizations (JCAHO) and the Institute for Safe Medication Practices (ISMP) are addressed with safety alerts, clinical alerts, human error alerts, and human error checks. Instructor resources available.