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| Alprazolam is a short-acting drug in the benzodiazepine class used to treat anxiety disorders and as an adjunctive treatment for depression. Alprazolam was invented by Upjohn (now a part of Pfizer) and is marketed under various trade names. Its patent (#3,987,052 [1]) was filed on October 29, 1969, granted on October 19, 1976 and expired in September 1993.
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