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In this text, a brief introductory chapter reviews the history of botanical-source pharmaceuticals, their active principle. The role of evidence-based medicine in determining efficacy and sate, and legal and regulatory aspects of herbal remedies. most common herbal remedies. Each entry reviews the indications and health benefits, what is known abut their pharmacology and toxicity, and the potential for drug interactions and side effects. Interactions and adverse reactions to over- the-counter drugs are covered in addition to prescription medications. Each entry concludes with an evidence-based list of print and online preferences. reactions and interactions, useful websites, and a glossary of botanical Latin names and common equivalents.