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In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.

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More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.

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About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.

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There are more nerve cells in one human brain than there are stars in the Milky Way.

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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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