Caffeine Withdrawal

Many of us don't just relish that first cup of joe in the morning—we need it. As this ScienCentral News video reports, a new study could wake up doctors to the symptoms of caffeine withdrawal.

The world's most popular drug is something you could very well have in a cup in front of you next to your computer right now—caffeine.

"Caffeine is the world's most widely used mood-altering drug," says Roland Griffiths, professor of behavioral biology at the Johns Hopkins University School of Medicine. "Some 80 percent of the population use caffeine on a daily basis. Caffeine is so available in our culture and society that many people consume coffee and soft drinks without the realization that they're actually involved in a drug self-administration behavior."

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