system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Site of action of epidural analgesia –
assistant
The correct answer is  Epidural opioid analgesics → act on opioid receptors present in substantia gelatinosa of dorsal horn cells.
Epidural local anesthetics → act on nerve roots.