National Institute of Health
The National Institutes of Health (NIH) is part of the U.S. Department of Health and Human Services and is the primary Federal agency for conducting and supporting medical research. Its mission is science in pursuit of fundamental knowledge about the nature and behavior of living systems and the application of that knowledge to extend healthy life and reduce the burdens of illness and disability.

National Institute on Drug Abuse
The mission of the National Institute on Drug Abuse (NIDA) 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 ensuring the rapid and effective dissemination and use of the results of that research to significantly improve prevention, treatment and policy as it relates to drug abuse and addiction.

National Institute of Mental Health
NIMH envisions a world in which mental illnesses are prevented and cured. The mission of NIMH is to transform the understanding and treatment of mental illnesses through basic and clinical research, paving the way for prevention, recovery and cure. The NIMH divisions and programs are designed to emphasize translational research spanning bench, to bedside, to practice.