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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).
In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
Carbamazepine can interfere with the results of home pregnancy tests. If you are taking carbamazepine, do not try to test for pregnancy at home.
Illicit drug use costs the United States approximately $181 billion every year.
By definition, when a medication is administered intravenously, its bioavailability is 100%.