abstract |
The analgesic effectiveness of an analgesic selected from the group consisting of (R)-5-(2-azetidinylmethoxy)-2-chloropyridine, (S)-5-(2-azetidinylmethoxy)-2-chloropyridine and pharmaceutically acceptable salts thereof is significantly potentiated by administering an analgesic-potentiating amount for said analgesic of at least one nontoxic NMDA receptor antagonist. |