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.