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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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Blood is approximately twice as thick as water because of the cells and other components found in it.
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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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The first monoclonal antibodies were made exclusively from mouse cells. Some are now fully human, which means they are likely to be safer and may be more effective than older monoclonal antibodies.