My father is 52 yrs. old, he's been insulin dependent for about 15yrs. He's 5'7 and weighs about 200lb. He really doesn't follow a diet. He eats whatever he wants, but when he checks his blood and it's about 300 or 400 he just injects his insulin. Since he eats whatever he wants, he doesn't lose any weight. Doctor's have told him he needs to lose weight. He also has had high cholesterol, but took some meds and it's normal now. I went to a doctor and lost about 10lb. with phentermine and B-12 shots every 2 wks. Does anyone know if it's safe for a diabetic person to take phentermine. His doctor prescribed him "Alli" to lose weight, but he didn't even bother to buy them. I just get scared that one day he might get a heart attack. He just doesn't take care of himself, he sometimes gets upset with Mom, when she tries to tell him, not to eat certain foods because they're bad for him.