This must-have handbook gives the clinical facts on 91 key herbs and supplements. The format is easily accessible, so the reader can obtain the bottom line facts on what to prescribe, and what to avoid. This portable reference provides the most essential information on safety, efficacy, interactions, and more. It contains only key facts and key references. This handbook is a companion to, and is based on the information contained in, the monographs for the "Natural Standard Herb and Supplement Reference: Evidence-Based Clinical Reviews".