Strange question........I have no idea if there are any calories in it or not. There doesn't seem to be any nutritional information I can find for the product. The reason being is that it is not Glucose or a Carbohydrate.
It is a synthetic hormone, a hyperglycaemic agent which triggers the body to release Glycogen from the liver which then converts to Glucose thereby elevating blood sugar levels. Used to treat a severe hypoglycaemic event.