Propiram is an orally administered analgesic with partial morphine-like agonist and weak antagonist properties. Analgesic efficacy of propiram, usually 50 or 100mg, appears comparable to that of standard dosages of other oral opioid drugs [i.e. pentazocine, pethidine (meperidine)] in patients with acute pain of moderate to severe intensity arising from various gynaecological and surgical procedures, and may be superior to codeine in gynaecological and postoperative dental pain. Propiram is a non-addictive analgesic for the relief of moderate-to-severe pain. Propiram reached Phase III clinical trials in the United States and Canada, but was discontinued. Propiram is a partial opioid mu receptor agonist.