alfentanil inn anileridine inn bezitramide inn bromazepam inn difenoxin inn diphenoxylate inn dipipanone inn fentanyl inn ketobemidone inn metilphenidate inn pentazocine inn pethidine inn pethidine inn intermediate a phencyclidine innpcp phenoperidine inn pipradol inn piritramide inn propiram inn u trimeperidine inn u limlieħ tagħhom