What is glucagon primarily used for?

Glucagon is a hormone produced by the pancreas that plays a critical role in glucose metabolism. Its primary function is to raise blood sugar levels by promoting the conversion of glycogen to glucose in the liver. This makes glucagon particularly useful in emergency situations where individuals are experiencing hypoglycemia, or low blood sugar, especially when they are unable to consume food or drinks due to unconsciousness or severe confusion.

When administered, glucagon effectively stimulates the liver to release stored glucose, quickly increasing blood glucose levels and alleviating the dangerous symptoms of hypoglycemia. This is why the correct answer focuses on its use in treating low blood sugar, particularly in unconscious individuals who cannot take sugar orally.

In contrast, the other options pertain to issues that glucagon does not address. For instance, glucagon is not indicated for treating high blood sugar or for stabilizing blood pressure. Additionally, while it is important in managing diabetes, glucagon does not serve as a replacement for insulin in Type 1 Diabetes; instead, it is a supplemental treatment used during instances of severe hypoglycemia.