Glossary of Medical Terms

caffeine

A substance found in the leaves and beans of the coffee tree, in tea, yerba mate, guarana berries, and in small amounts in cocoa. It can also be made in the laboratory, and is added to some soft drinks, foods, and medicines. Caffeine increases brain activity, alertness, attention, and energy. It may also increase blood pressure, heart rate, breathing rate, and the loss of water from the body in urine.

  • Bookmark
  • Print

    Find a Doctor

Click the button above or call
1 877 NYP WELL


eNewsletters
Top of page