Secret Remedies: What They Cost and What They Contain is a groundbreaking exposé first published in 1909 by the British Medical Association. This meticulously researched volume delves into the world of patent medicines and proprietary remedies that flooded the market in the late 19th and early 20th centuries. The book systematically investigates a wide array of popular over-the-counter products, revealing their actual ingredients, the often exorbitant prices charged, and the misleading claims made by their manufacturers. Drawing on laboratory analyses and expert medical opinion, Secret Remedies uncovers the truth behind the marketing of tonics, pills, elixirs, and other so-called cures that promised relief from ailments ranging from headaches and indigestion to more serious conditions. The book exposes how many of these remedies contained little more than sugar, alcohol, or common chemicals, offering little therapeutic value and sometimes posing real dangers to public health. With detailed tables, case studies, and incisive commentary, the book not only educates readers about the contents and costs of these secret remedies but also serves as a powerful call for greater regulation and transparency in the pharmaceutical industry. Secret Remedies remains a landmark in the history of consumer protection and medical ethics, providing a fascinating glimpse into the origins of modern drug regulation and the ongoing struggle against medical quackery.