Napitupulu ODVA, Arifin H, Nasution SP. COMPARATIVE ANALYSIS OF ANALGESIC ONSET AND DURATION: BUPIVACAINE WITH FENTANYL VS. BUPIVACAINE WITH MEPERIDINE IN SPINAL ANESTHESIA FOR CESAREAN SECTION. EMPIRIS. 2025;2(3):492-500. doi:10.62335/empiris.v2i3.1797