耳鼻喉科病人多需手术，粘膜表麻药物很重要，现有表麻药有毒性、麻醉效果不理想、制剂不稳定等缺点。新一代表麻药Leocaine是地卡因的改进制剂，稳定、性较地卡因好，麻醉效力大3倍，所用浓度低、故毒性大大降低，不加稳定剂及防腐剂也可保存2年以上，病人耐受好，无局部或全 Otolaryngology patients require surgery, mucosal ephedrine drugs are important, the existing table anesthetic toxicity, anesthetic effect is not ideal, preparation instability and other shortcomings. The new generation of anesthetic Leocaine is an improved formulation of dexamethasone. Its stability is better than that of cocaine, its anesthetic efficacy is 3 times greater, its concentration is lower, its toxicity is greatly reduced, and its stability can be preserved for more than two years without stabilizer and preservative Patient tolerance is good, no partial or complete