RT Book, Section A1 Ciccone, Charles D. SR Print(0) ID 1180854008 T1 Basic Principles of Pharmacology T2 Pharmacology in Rehabilitation YR 2016 FD 2016 PB F. A. Davis Company PP New York, NY SN 9780803640290 LK fadavispt.mhmedical.com/content.aspx?aid=1180854008 RD 2024/03/29 AB Pharmacology is the study of drugs. In its broadest definition, a drug can be described as “any substance that, when taken into a living organism, may modify one or more of its functions.”1 In this sense, a drug includes any substance that alters physiological function in the organism, regardless of whether the effect is beneficial or harmful. In terms of clinical pharmacology, it has traditionally been the beneficial or therapeutic effects that have been of special interest.