You have to stop taking your tablet because it is excreted through the kidneys as also the contrast injected for the catheterization. Both together can damage the kidneys and this is the reason to stop your tablets.

Normally your doctor advises you to inject insulin if the blood sugar values are out of control. But it is possible to manage with right diet these seven days without tablets.

Control your blood sugar value two hours after you have taken your last meal and this value must be below 140 mg/dl. Above this value you have to inject insulin to reduce the blood sugar.

What to eat to keep the blood sugar normal? You have to reduce the intake of carbohydrates. Simple sugar and milled grains products must be avoided completely. You can take a slice of whole grain bread in the morning. All the foods which contain much protein are allowed. Cheese, eggs, nuts, poultry and whole grains are good. It is advisable to take more protein to get the necessary blood sugar values. As we know protein is converted into sugar in the liver.

For lunch you can take a big salad with many leafy vegetables with 50 to 60 g cooked rice, noodles or potatoes. Few pieces of lean meat and poultry are also good.

In the evening you can take only nuts and curd. A piece of whole grain bread is also good. If you are hungry in between take a piece of cheese or nuts are good. Almond, walnut and pumpkin seeds are good.

Do not worry about the fat from meat or from nuts during these because you have to take the other medicines except diabetes medicine normally.

If you are an Asian take one or two small idlys or one chapathi with chutney or vegetable kuruma. Noodle soups are also good. With this strategy you can keep the blood sugar normal. Without hunger and insulin injection I could keep the blood sugar of a 60 years old man well in normal range, below 130 mg/dl after two hours of his meals.