Question

Which aniline derivative is a commonly used dental local anaesthetic?

• A. Paracetamol
• B. Sulfanilamide
• C. Lidocaine
• D. Aniline hydrochloride

Hint:

Lidocaine is a commonly used local anaesthetic due to its effectiveness and low toxicity.

Answer 1

The Correct Option is C

Lidocaine is the aniline derivative dentists reach for to numb an area before a procedure. Chemically it belongs to the amide class of local anaesthetics, and it works by blocking sodium channels in nerve fibres so pain signals cannot pass through. None of paracetamol, sulfanilamide or aniline hydrochloride are used this way, so the correct option is (C) Lidocaine.