Proglumide
Proglumide is a racemate composed of equal amounts of (R)- and (S)-proglumide. A non-selective CCK antagonist that was used primarily for treatment of stomach ulcers, but has been replaced by newer drugs. It has a role as a drug metabolite, a xenobiotic metabolite, a cholinergic antagonist, an anti-ulcer drug, a cholecystokinin antagonist, a gastrointestinal drug, a delta-opioid receptor agonist and an opioid analgesic. It contains a (R)-proglumide and a (S)-proglumide.