A Study of Metformin With or Without Rapamycin as Maintenance Therapy After Induction Chemotherapy in Subjects With Pancreatic Cancer

Subjects with metastatic PDA who have received FOLFIRINOX or a gemcitabine-containing regimen and have achieved stable disease or better will be enrolled onto this study. Subjects should have had at least 6 months of chemotherapy and decline continuation of chemotherapy and should have stable disease or better on 2 scans taken at least 6 weeks apart. If applicable, subjects should also have a stable or declining CA19-9. Twenty-two subjects will be randomized in a 1:1 ratio to metformin (Arm A) or metformin + rapamycin (Arm B). Subjects will be stratified according to their prior chemotherapy regimen: FOLFIRINOX or a gemcitabine-containing regimen. Treatments will be administered orally on a 28 day cycle. Metformin will be administered 850mg twice daily and rapamycin will be administered 4mg daily.