Diabetic after whipples. 250mg metformin 3 times a day. Diabetes under control but losing weight after cutting down on carbs. Want weight gain?

It will be difficult. I'm glad that you're able to control your inevitable diabetes after a Whipples with only a low dose of Metformin. Metformin is also one of the best anti-cancer medications there is--so I encourage you to continue to take it. You'll just need to increase your caloric intake--mostly fat and protein. Appetite enhancers include the antihistamine Periactin (cyproheptadine hydrochloride) (best taken at night), and the cannabinols.