GMP refers to the Good Manufacturing Practice regulations promulgated by the US Food and Drug Administration under the authority of the Federal Food, Drug, and Cosmetic Act (See Chapter IV for food, and Chapter V, Subchapters A, B, C, D, and E for drugs and devices.) These regulations, which have the force of law, require manufacturers, processors, and packagers of drugs, medical devices, some food, and blood to take proactive steps to ensure their products are safe, pure, and effective.