Skip to content
WebMD: Better Information. Better Health.
Other search tools:Symptoms|Doctors|Videos

Medical Dictionary

caffeine

Pronunciation (kaf′ēn)
Font Size
A
A
A
  1. An alkaloid obtained from the dried leaves of Thea sinensis, tea, or the dried seeds of Coffea arabica, coffee; used as a central nervous system stimulant, diuretic, circulatory and respiratory stimulant.

Syn: guaranine, thein

WebMD Medical Reference from "Stedman's Medical Dictionary"

The publisher is not responsible (as a matter of product liability, negligence or otherwise) for any injury resulting from any material contained herein. This publication contains information relating to general principles of medical care which should not be construed as specific instructions for individual patients. Manufacturers’ product information and package inserts should be reviewed for current information, including contraindications, dosages and precautions.
webMD Video

Show or hide information about video: Diagnosing Yeast Infections   Diagnosing Yeast Infections

Ob-Gyn Laura Corio explains why women should not try to diagnose their own yeast infection.

Watch Video: Diagnosing Yeast Infections (opens in a new window)

Show or hide information about video: Reducing Urinary Incontinence   Reducing Urinary Incontinence

Show or hide information about video: Battling Bladder Infections   Battling Bladder Infections

Show or hide information about video: New Ideas for Preventing Kidney Stones   New Ideas for Preventing Kidney Stones

Show or hide information about video: Treating Enlarged Prostate   Treating Enlarged Prostate