Task: Answer Verification
Input (English): Question: Does addition of clonidine or dexmedetomidine to bupivacaine prolong caudal analgesia in children?
Answer: Addition of dexmedetomidine or clonidine to caudal bupivacaine significantly promoted analgesia in children undergoing lower abdominal surgeries with no significant advantage of dexmedetomidine over clonidine and without an increase in incidence of side-effects.
Output (English): yes