How long does it take for tetracaine hydrochloride gel to take effect?

Under normal circumstances, tetracaine hydrochloride gel usually takes effect within 4 to 10 minutes. The detailed analysis is as follows:

Tetracaine hydrochloride gel is a white, viscous topical medication belonging to external preparations. Its main active ingredient is tetracaine hydrochloride. After application, the drug component binds to receptors in the local skin and mucous membranes, thereby producing an anesthetic effect. Clinically, it is primarily used for surface anesthesia and pain relief during surgical examinations, such as gastroscopy and urethral catheterization. Applying tetracaine hydrochloride gel to the affected area helps reduce patient discomfort. After application to the examination site, the effect typically begins within 4 to 10 minutes and generally lasts for 40 to 60 minutes. Patients should use this medication only under a doctor's guidance and must not self-administer, to avoid overdose and potential toxic reactions.

After using the medication, patients should monitor their physical condition and ensure unobstructed breathing. Individuals with conditions such as hypertension, heart failure, diabetes, or other related disorders should use this medication cautiously to prevent increased strain on the body.