商品名：Rapifen*
Pure mu agonist of the phenylpiperidine series.
Very potent opioid analgesic (10–20 times more potent than morphine) used to provide intraoperative analgesia during anaesthesia in dogs and cats. Use of such potent opioids during anaesthesia contributes to a balanced anaesthesia technique but they must be administered accurately. It has a rapid onset (15–30 seconds) and short duration of action. It is best given using continuous rate infusions. The drug is not suited to provision of analgesia in the postoperative period.
劑量數字暫停提供：VetPro 的劑量改依 DRUGAPI 藥物資料庫對外的內容，DRUGAPI 目前不提供可直接計算的劑量。下方列出 DRUGAPI 的審查結論與劑量審查引用的來源；計算機可手動輸入劑量換算。
公開犬貓數字來自專業表或特定複方麻醉 protocol，不能壓成單一通用劑量、間歇療程或飼主指示；且現有 5 mg/mL 疑似十倍濃度錯誤。計算器與處方產生在精確產品、濃度、物種、麻醉用途、併用藥、幫浦與通氣計畫閉合前封鎖。
依出現頻率分組；嚴重副作用獨立列出，臨床上需立即辨識。
20 minutes