This is a worldwide best-selling reference for evaluating medication use in breastfeeding mothers. Since its original publication in 1992 (currently in its 11th edition) this book has quickly become to best pharmacological advice in breastfeeding, from mothers seeking information to professionals throughout the world. This all-inclusive reference contains page after page of the most current information available in this field, including new studies and additional drug entries. Written by renowned Clinical Pharmacologist, Dr. Thomas W. Hale, the author provides the reader with easy to understand explanations of how drugs enter milk, their problems, if any, and the relative safety of their use in breastfeeding mothers.