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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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By definition, when a medication is administered intravenously, its bioavailability is 100%.
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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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Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.
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Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.