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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).
This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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.
According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.