Local anesthetic with longest duration of action:

# In peripheral nerve block, which of the following local anesthetics has the longest duration of action?
A. Bupivacaine
B. Cocaine
C. Lignocaine
D. Prilocaine

The correct answer is A. BUPIVACAINE

Etidocaine (200 mins) followed by Bupivacaine (180 mins) are long acting anesthetics and this is due to their increased protein binding property.

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