What is glucagon primarily used for?

Glucagon is primarily utilized in emergency situations to treat hypoglycemia, particularly in cases where an individual is unable to consume oral glucose due to unconsciousness or an inability to swallow. It functions by promoting the release of glucose from the liver into the bloodstream, thereby rapidly increasing blood sugar levels. This is crucial in preventing possible complications that may arise from low blood sugar, such as seizures or loss of consciousness.

The other options involve conditions that glucagon does not address. For instance, lowering high blood sugar is typically managed through insulin or other medications designed for diabetes control. Managing high cholesterol usually involves lifestyle changes and cholesterol-lowering medications, while treatment for anxiety often includes therapy and medications specifically designed for mental health. Thus, glucagon's focused role on hypoglycemia distinguishes it from the other listed treatments.