The U.S. Pharmacopeial Convention last week announced that it is working with the Food and Drug Administration and the Consumer Healthcare Products Association to update quality standards for widely used medicines and ingredients. Updated test methodologies are crucial to help counter economically motivated adulteration — in which less expensive and potentially harmful ingredients are substituted for genuine medicines or their ingredients — and also to address the challenge of impurities that may go undetected with older, nonspecific assays and tests.