Overview Study of Sildenafil as a Therapy for Fatigue in Pancreatic Cancer Status: Withdrawn Trial end date: 2017-06-01 Target enrollment: Participant gender: Summary Investigation of the effects of daily sildenafil on patients with pancreatic or cholangiocarcinoma cancer undergoing treatment. Phase: Phase 1 Details Lead Sponsor: The University of Texas Medical Branch, GalvestonTreatments: Sildenafil Citrate