This is a Phase 2 study with an open labelled lead-in study to approximately treat 30 patients \[6 subjects for Lead-in and 24 for Phase 2\] enrolled with metastatic pancreatic cancer with combination therapy using standard of care first line therapy with GEM-NAB-P (GEM 1000mg/m2 IV and NAB-P 125 mg/m2 given days 1, 8, and 15 every 28 days, and proglumide will be tested at the daily dose of 1200 mg orally given as 400 mg po TID. The lead-in study will determine the safety and tolerability of the 1200 mg daily dose of proglumide with standard of care GEM-NAB-P. If 0 or 1 of a total of 6 patients at 400mg experiences a DLT, then we will proceed to the Phase 2 randomized trial.