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In 1864, the first barbiturate (barbituric acid) was synthesized.
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Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.
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There are more sensory neurons in the tongue than in any other part of the body.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.