Because of a lapse in government funding, the information on this website may not be up to date, transactions submitted via the website may not be processed, and the agency may not be able to respond to inquiries until appropriations are enacted. The NIH Clinical Center (the research hospital of NIH) is open. For more details about its operating status, please visit cc.nih.gov. Updates regarding government operating status and resumption of normal operations can be found at opm.gov.

Nicotine Addiction

People use tobacco for different reasons. But one thing is the same—nicotine is addictive. Learn how smoking cigarettes affects you and those around you. And take a quiz to find out why you use tobacco.