商品名：Amethocaine hydrochloride*
Local anaesthetic action is dependent on reversible blockade of the sodium channel, preventing propagation of an action potential along the nerve fibre. Sensory nerve fibres are blocked before motor nerve fibres, allowing a selective sensory blockade at low doses.
Local anaesthesia of the ocular surface (cornea and conjunctival sac). Although effective, it is rarely used in veterinary practice. An alternative topical ophthalmic anaesthetic such as proxymetacaine is advised. Duration of action has not been reported in companion animal species. Topical anaesthetics block reflex tear production and should not be applied before a Schirmer tear test.
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。
NLM 官方術語將 Tetracaine 列為首選名稱，Amethocaine 為同一藥物的 entry term。D0633 與既有已複核的 D0040 runtime 紀錄重複，因此不得計算、處方或提供第二套臨床內容；選擇 D0040 作專案主 ID 是資料治理決策，不代表 amethocaine 在化學或術語上較優先。