STAGE IV means just before terminal position and in my opinion cure may not be possible at all.
If your doctor is assuring cure in 6 months, then there is nothing like that and you have to go with his word and treatments. But a patient with chemotherapy of 6 month, living there after is also have a remote possibility.
The prognosis of Pancreatic cancer is that Patients diagnosed with pancreatic cancer typically have a poor prognosis partly because the cancer usually causes no symptoms early on, leading to metastatic disease at time of diagnosis. Median survival from diagnosis is around 3 to 6 months; 5-year survival is much less than 5% With 32,180 new diagnoses in the United States every year, and 31,800 deaths, mortality approaches 99%, giving pancreatic cancer the #1 fatality rate of all cancers and the #4 cancer killer in the United States amongst both men and women.
Any way please try as nothing is in our hands. Best of luck-