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The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
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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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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
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Your heart beats over 36 million times a year.
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There are 60,000 miles of blood vessels in every adult human.