husband needs to gain weight

Hi. Weight loss can be a problem when the pancreas isn't producing enough insulin and hence carbs cannot be transformed into energy and/or stored; taking too many won't increase weight but will increase blood sugar. Apart from moving to insulin in the longer term, increasing fat intake is one way to enable the body to gain weight and energy. This may not be enough in which case insulin is needed. The Gliclazide will stimulate the remaining beta cells to produce more insulin but may not be ideal if pancreatitis is present and this needs to be monitored by the GP as I'm sure it is.

He probably needs to see a dietician. I know a gentleman also diagnosed, same as yours. He had diabetes team telling him one thing for diet, and the pancreatic consultant telling someting totally diffferent.
He got referred to a dietician who helped enormously..
Incidentally, he too had lost huge amount of weight.. And original advice on food from hcp's was barely enought to keep a sparrow alive...let aline put some weight back on.
He has successfully put on some weight now...

Forgot to say... That because the chap I know needed to pile on weight he was actually put on insulin for a while so that he could eat substantially without having to battle with high levels. High levels can also cause weight loss so I know it was a battle for him initially. He went from diet to tablets to insulin.
I know it was a battle for him but when on insulin he put on weight. It was the dietician that intervened for him between two differing opinions on food from two differing consultants.