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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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Approximately 25% of all reported medication errors result from some kind of name confusion.
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In 1864, the first barbiturate (barbituric acid) was synthesized.
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Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.