One of the mysteries of the English language finally explained.
More fully "propantheline bromide". An anticholinergic drug used chiefly in the treatment of spasmodic disorders of the gastrointestinal and urinary tracts. [Chemical name: (2-hydroxyethyl)diisopropylmethyl-ammonium bromide xanthene-9-carboxylate; C23H30BrNO3 A trademark for this drug is Pro-Banthine.]
1950s; earliest use found in British Journal Pharmacology. From prop- + -antheline.
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