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There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).
Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
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.
It is difficult to obtain enough calcium without consuming milk or other dairy foods.