Personally I wouldn't be reaching for pills Leebens.
In order to lose weight you must burn more calories than you consume, so if you cut back on your food intake the weight will eventually begin to fall off.
I'm a type 1 and have worked nights and know what it's like, you eat more than the normal and often the wrong foods as your eating at inconvenient times. A few years back I lost two and half stone but did so over a long period of time, I did so by reducing my portion sizes and stopped snacking between meals, whilst also getting a bit fitter by walking more with my dog.
At the time I think I was eating around 130g of carbs a day, so I wasn't too low carb but was eating well below the RDA, I can't take all the credit as I did see a dietitian who had just graduated and joined our hospital diabetes clinic, they are very good at drawing up an eating plan and will look at your diet with a view to cutting back on your calories, as a type 1 you are entitled to see a dietitian so it might be worth while asking your GP/DSN or Consultant if they can refer you over.