If you've slipped up and consumed too much alcohol, be sure to avoid carbohydrates. One of the biggest reasons alcohol poses a risk to diabetes sufferers is that it is full of quickly absorbed carbohydrates. Staying away from carbohydrates will keep your blood sugar levels from spiking any further, and will help prevent your alcohol consumption from causing any additional problems.
Never rely only on urine ketone tests to measure the amount of glucose in your blood. The only time you will have high ketone levels is when your blood glucose levels are greater than 200 mg/dl. Organizations like the ADA recommend that those with diabetes use more reliable testing methods, like strips or finger, pokes.