The pharmacology of 14‐hydroxyazidomorphine

6‐Deoxy‐6‐dihydroazido‐14‐hydroxyisomorphine (14‐hydroxyazidomorphine) was synthesized, its analgesic potency in mice and rats, its antitussive effect in rats and its dependence liability in mice, rats and monkeys were studied. Azidomorphine, the 14‐nonhydroxylated parent molecule, morphine, hydromorphone and oxymorphone were used for comparison. 14‐Hydroxyazidomorphine proved to be as potent an analgesic as azidomorphine, even more potent as an antitussive, and showed the same low tolerance and dependence capacity. It was 11.6 times less toxic than azidomorphine in mice and 6.5 times less toxic in rats.