Pharmacokinetics: Practical Application to Antimicrobial TherapyAhern, John W. PharmD*†; Pierce, Kristen K. MD†Infectious Diseases in Clinical Practice: January 2011 - Volume 19 - Issue 1 - pp 16-24 doi: 10.1097/IPC.0b013e3181f0c12a Review Articles Abstract Author Information Antimicrobial concentrations at the site of infection are an important predictor of antibiotic efficacy. Pharmacokinetics is a subdivision of pharmacology that describes how drug concentrations change as a function of absorption, distribution, and elimination. As a result, pharmacokinetic concepts can be used by practitioners to prescribe and adjust antibacterial dosage regimens so that concentrations are optimal for the treatment of infectious diseases. This article reviews basic pharmacokinetic principles. It also illustrates through practical application the pertinence of pharmacokinetics to antimicrobial therapy. From the *Pharmacy Department, Fletcher Allen Health Care and †Infectious Diseases Unit, Department of Medicine, University of Vermont College of Medicine, Burlington, VT. Correspondence to: John W. Ahern, PharmD, Pharmacy Department, Fletcher Allen Health Care, 111 Colchester Ave, Burlington, VT 05401. E-mail: firstname.lastname@example.org. The authors have no funding or conflicts of interest to disclose. © 2011 Lippincott Williams & Wilkins, Inc.