A third class of drugs is available, but is not commonly used, is called Alpha-glucosidase inhibitors.

Alpha-glucosidase inhibitors are drugs that slow down the rate at which complex carbohydrates (link to terminology) are broken down and release from the gut into the bloodstream.  They work directly on the carbohydrates that are eaten and therefore they have a very low risk of hypoglycaemia.  Alpha-glucosidase inhibitors do not have any effect on simple carbohydrates like fruit, fruit juice, sweetened cold drinks, milk and sweets, so your blood sugar (glucose) levels will still go up after eating or drinking these foods.

Unfortunately, because they work on the carbohydrates in the gut, a common side effect of using this drug are bloating and flatulence, but if started slowly and your doctor increases the dose slowly, these side effects tend to be less.