National Institute on Drug Abuse – An institute in NIH. NIDA’s mission is to lead the Nation in bringing the power of science to bear on drug abuse and addiction. This charge has two critical components: The first is the strategic support and conduct of research across a broad range of disciplines. The second is to ensure the rapid and effective dissemination and use of the results of that research to significantly improve drug abuse and addiction prevention, treatment, and policy. NIDA supports over 85 percent of the world’s research on the health aspects of drug abuse and addiction.