This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous (Local and Regional Anesthesia), Subject name: Anaesthesia
Effect of cocaine on blood vessels is? 
Select and explain. 
A. Vasoconstrictor, B. Vasodilator, C. Vasoineffective, D. First constrict then dilates
A: Vasoconstrictor
Answer: A: Vasoconstrictor 
Explanation: ANSWER: (A) VasoconstrictorREF: KDT 4th e p. 166Effect of local anesthetic on blood vessels is:VasoconstrictorVasoineffectiveVasodilatorCocaineLignocaineOthers