Rx Facts Drug Interactions Author:David S. Tatro, Lippincott, Springhouse (Wolters Kluwer) Author is a drug information analyst in San Carlos, CA. Pocket-sized quick reference of drug interactions, for clinicians and pharmacists. Symbols denote major drug effects, such as toxicity and rapid interaction. Interacting drug classes are not indicated, with the exception of oral contraceptives. Alphabetical by drug. Softco... more »ver.« less