This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Central Nervous system, Subject name: Pharmacology
True about epidural opioids are all except? 
Select and explain. 
A. Act on dorsal horn substantia gelatinosa, B. Can cause Itching, C. Function of the intestine is not affected, D. Can cause respiratory depression
C: Function of the intestine is not affected
Answer: C: Function of the intestine is not affected 
Explanation: Epidural opiate administration is routinely used by many anaesthesiologists involved in obstetric anaesthesia. Epiduralinjection of a local anaesthetic combined with an opioid generates a more rapid onset of more profound analgesia with little motor blockade. Thus pain relief lasts longer than after either drug alone. Ref: KD Tripathi 8th ed.