January 21/The Philadelphia Inquirer -- Researchers at Thomas Jefferson University say they have identified a key agent in the brain chemistry responsible for hangover headaches and that a good remedy is one tried by every tormented soul who has ever groped for a morning-after cup of coffee: caffeine.
The stimulant has long been an ingredient in over-the-counter headache medications. However, the Jefferson study is the first to link caffeine's effectiveness to its ability to block the activity of a chemical called adenosine.