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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.
People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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).