In what situation would you use a glucagon injection?

The use of a glucagon injection is specifically indicated in cases of severe hypoglycemia, which is a critical condition characterized by dangerously low blood sugar levels. Glucagon is a hormone produced by the pancreas that helps raise blood sugar levels by stimulating the liver to convert glycogen into glucose and release it into the bloodstream. When a person is experiencing severe hypoglycemia, they may be unable to consume adequate carbohydrates due to symptoms such as confusion, loss of consciousness, or seizures. Administering glucagon can quickly reverse these symptoms by increasing blood glucose levels to restore normal functioning.

In contrast, the other situations listed do not warrant glucagon administration. Moderate hypertension is managed through medications and lifestyle changes but does not involve glucose regulation. Allergic reactions typically require antihistamines or epinephrine rather than glucagon. Dehydration is treated with fluid replacement and not a glucagon injection, as it does not relate to blood sugar levels. Therefore, glucagon is specifically useful as an emergency treatment for severe hypoglycemia.