This is a clinical trial to determine more effective methods of controlling the pain in pancreatic cancer. Although narcotic pain medication are effective, they have many side effects and are underutilized due to social stigma and fear of addiction. Celiac plexus neurolysis is a nerve block procedure that has been shown to be effective in uncontrolled clinical trials. We hypothesized that celiac plexus neurolysis plus pain medication will be more effective and have fewer side effects than pain medication alone. We are evaluating the effectiveness of this standard pain medications with or without celiac plexus neurolysis in a randomized controlled trial. One half of the participants will receive pain medications only and the other half will receive pain medications plus neurolysis, delivered via an endoscopic ultrasound device placed in the stomach.