Tetracaine hydrochloride is a kind of long-acting ester local anesthetic, which has the characteristics of strong penetration of mucosa and is suitable for surface anesthesia, and is often used in ophthalmology. After injection, the anesthetic effect appears slow (about 10 minutes), the post-absorption metabolism is also slow, and the local anesthesia time is as long as 3IJ, H,-J. Around. There were no adverse reactions such as vasoconstriction, dilation of pupil, corneal injury, etc. The local anesthetic effect and toxicity of buchemicalbook hydrochloride were about 10 times greater than that of procaine. It is mainly used for surface anesthesia of the mucous membranes of the eyes, nose and throat, and rarely used for conduction anesthesia and epidural anesthesia. It is generally not used for infiltration anesthesia due to high toxicity.
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