Which of the following drugs has a high surface activity and vasoconstrictor actions that reduce bleeding in mucus membranes?: (A) Bupivacaine, (B) Cocaine, (C) Lidocaine, (D) Procaine
Answer is B. (Ref: KDT 6/e p356, 357) All LAs are vasodilators except cocaine. It possesses vasoconstrictor activity. Cocaine also has good surface activity.