<unk>  (Prisilidine, Nisentil) is an opioid analgesic that is an analogue of pethidine (meperidine).
There are two isomers of<unk> , Alphaprodine and Betaprodine. Betaprodine is some 5x more potent than alphaprodine, but is metabolised more rapidly, and only alphaprodine was developed for medicinal use. It has similar activity to pethidine, but with a faster onset of action and shorter duration.
Alphaprodine was sold under several brand names, mainly Nisentil and Prisilidine. It was mainly used for pain relief in childbirth and dentistry, as well as for minor surgical procedures.<unk>  has similar effects to other opioids, and produces analgesia, sedation and euphoria. Side effects can include itching, nausea and potentially serious respiratory depression which can be life-threatening. Respiratory depression can be a problem with alphaprodine even at normal therapeutic doses.
Prodine
Niperotidine
Moricizine
Famotidine 
Hexetidine
Pantoprazole 
Lansoprazole
Fluvalinate