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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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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.
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Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.