Patients considering use of glucagon should consult with a physician if they have any of the following conditions:

• Diabetes. Glucagon used for x-ray tests can cause hyperglycemia (high blood glucose).

• Hypoglycemia that is chronic or is due to alcohol consumption, starvation or adrenal insufficiency. These cases should be treated with glucose, according to the U.S. Food and Drug Administration.
  
  
• Insulinoma (a tumor of the insulin–secreting cells in the pancreas). Patients may find that glucose concentrations decrease after using glucagon.
  
  
• Pheochromocytoma (tumor of an adrenal gland). Glucagon may cause high blood pressure.
  
  
• Suspected hypersensitivity to glucagon. Glucagon is not recommended if a patient is known to be allergic or hypersensitive to it.