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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).
Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.
Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.