|
|
In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
In 1864, the first barbiturate (barbituric acid) was synthesized.
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).