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Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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Everyone has one nostril that is larger than the other.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.