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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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).
It is difficult to obtain enough calcium without consuming milk or other dairy foods.
The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
The strongest synthetic topical retinoid drug available, tazarotene, is used to treat sun-damaged skin, acne, and psoriasis.