demerol

Pethidine (INN, AAN, BAN) or meperidine (USAN) was once a popular synthetic opioid analgesic of the phenylpiperidine class. Synthesized in 1939 as a potential anticholinergic agent by the German chemist Otto Eisleb, its analgesic properties were first recognized by Otto Schaumann while working for IG Farben, Germany.