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Prodine (trade names Prisilidine and Nisentil) is an opioid analgesic that is an analog of pethidine (meperidine). It was developed in Germany in the late 1940s. Several 1-alkyl-4-phenyl-4-acyloxypiperidines have been prepared and found to possess significant analgesic action. Those compounds with the 4-propionoxy substituent appear to be the most potent analgesics. Ziering and Lee found that embellishing this structure via the incorporation of a 3-methyl group into the piperidine nucleus greatly enhanced the pharmacological activity. There are two isomers of prodine, 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 has a DEA ACSCN of 9010 and 2013 manufacturing quota of 3 grammes; betaprodine has an ACSCN of 9611 and a 2 gramme quota. 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. Alphaprodine has a duration of action of 1 to 2 hours and 40 to 60 mg is equal to 10 mg of morphine via the subcutaneous route. Prodine 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. Unlike pethidine, prodine does not produce toxic metabolites and is therefore more suitable for high dose therapy. ==See also== *Trimeperidine 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「prodine」の詳細全文を読む スポンサード リンク
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