Meptazinol

Meptazinol (trade name Meptid) is an opioid analgesic developed by Wyeth in the 1970s. Indications for use in moderate to severe pain, most commonly used to treat pain in obstetrics (childbirth).

Meptazinol is a 3-phenylazpane derivative, whereas the other phenazepanes like ethoheptazine and proheptazine are 4-phenylazepanes.