The purpose of this study is to examine endoscopic ultrasound guided celiac plexus neurolysis (CPN) with analgesic therapy in patients with unresectable pancreatic cancer will decrease the severity of abdominal pain when compared to analgesic therapy alone. The specific primary aim of this study is to evaluate the efficacy of EUS-CPN + analgesic therapy (Group 1) in pain relief of patients with unresectable pancreatic cancer when compared with analgesic therapy (Group 2). The hypothesis will be tested by comparing the changes in reported pain severity between those who receive EUS-CPN in addition to analgesic therapy as compared to analgesic therapy alone.