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Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.

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If all the neurons in the human body were lined up, they would stretch more than 600 miles.

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Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.

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Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.

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Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.

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