If you've had gastric surgery or part of your stomach removed and you're having the symptoms of dumping syndrome such as diarrhea, flushing, or dizziness it's important to change your diet in order to adapt to this dumping syndrome. Having smaller meals, low carbohydrate meals, not mixing liquids and solids with your meals so really just keeping them separate so that the stomach empties a little bit more consistently. Low fiber may actually help with managing those symptoms as well. Again, it's a little bit difficult to manage but by changing your diet a little bit it becomes a little bit more manageable.
If you still have dumping syndrome and you've tried all the dietary changes and it's still not working, you're still getting very symptomatic, your doctor may prescribe medications to help slow down the emptying of your stomach and slow down the whole digestive track. By slowing down the digestive track it will help you cope with the symptoms.