Which of the following cannot be used as a surface local anaesthetics ?
Correct answer: A. Procaine
- A. Procaine
- B. Tetracaine
- C. Lidocaine
- D. Benzocaine
Explanation
Procaine is poorly lipid-soluble and penetrates intact mucous membranes inadequately, so it is unsuitable for surface anaesthesia. Tetracaine, lidocaine and benzocaine are commonly used topical local anaesthetics.
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