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  400bc: Greek physician prescribe barks and leaves of willow tree to relieve pain and fever (in rich substance called salicin).
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  1832: German chemist experiment salicin and creates salicylic acid.
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  1899: Bayer distributes aspirin powder to physicians and soon aspirin is no.1 drug in the world.
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  1915: Aspirin can be bought with no prescription. In tablet form.
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  1920s: Use to treat symptoms like rheumatism, lumbago and neuralgia.
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  1948: Dr. Lawrence Craven notice 400 people he prescribed to eat aspirin don’t suffer heart attacks.
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  1952: Children’s chewable aspirin introduce.
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  1969: Bayer aspirin brought with Apollo astronauts.
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  Early 1970s: Medical world begin to understand how aspirin works.
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  1984: Toleraid microcoating added for easier to swallow.
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  1988: Aspirin can become potential lifesaver.
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  1997: Aspirin is now used for heart attacks, strokes, pregnancy problems, diabetes and dementia.