As per MyFitnessPal, 1 serving of Stoney's beer (12 oz.) has 5 grams of sugar.
According to the American Diabetes Association, people with diabetes need to use the same guidelines as those without diabetes if they choose to drink:
Women: no more than 1 drink per day.
Men: no more than 2 drinks per day.
Note: One drink is equal to a 12 oz beer, 5 oz glass of wine or 1 ½ oz distilled spirits (vodka, whiskey, gin, etc.).
Drinking alcohol can cause a drop in blood glucose because alcohol blocks the production of glucose in the liver. (The liver contains “emergency stores” of glucose to raise your blood sugar if it drops too low.) Once the liver's stores of glucose are used up, a person who has drank a lot of alcohol can't make more right away, and that can lead to dangerously low blood glucose or even death.
Also, alcohol is processed by your liver, which is responsible for removing toxins (like alcohol or drugs) and processing medication, so if you are taking other pills, drinking too much alcohol can cause damage to your liver. If you have any questions about whether alcohol is safe for you, check with your doctor.
Here are The Best and Worst Drinks for Diabetics shared by Reader's Digest.