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The familiar sounds of your heart are made by the heart's valves as they open and close.
Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
Illicit drug use costs the United States approximately $181 billion every year.
Lower drug doses for elderly patients should be used first, with titrations of the dose as tolerated to prevent unwanted drug-related pharmacodynamic effects.
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).