America's committment to drug safety began in 1906, when the agency that would become the Food and Drug Administration (FDA) was created. Our drug safety laws have been improved throughout the intervening century, but the most important addition was the Food, Drug, and Cosmetic Act of 1938, which granted the agency real power for the first time. Most importantly, the 1938 act was the first law to require the testing of drugs before they were sent to market. It also banned drugs that didn’t list all their active ingredients and forced companies to truthfully describe the effects of their products. (Before the FDA got to it, Listerine advertised its ability to cure tuberculosis.)