Whenever I have a headache, I usually go for a soda or energy drink over Tylenol or Advil because it just seems to relieve it better. Why is this?
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Believe it or not, headaches are still quite a mystery to science. It is thought that some headaches are caused by the swelling or dilation of blood vessels in the brain.
Caffeine can constrict blood vessels. So some headache medicines include caffeine in order to reduce that dilation.
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