Glucose that exceeds metabolic needs is converted and stored by the liver
Explanation:
The patient is suffering from type 1 diabetes and takes glyburide which is an oral hypoglycemic.
In the glucose pathway, excess glucose will be converted to glycogen and will be stored in the liver. Under normal conditions, when the body needs excess glucose, like in the above case after a marathon run, glycogen converts back to glucose by the processes of glycogenolysis and gluconeogenesis.
Glyburide acts against increasing blood glucose levels by inhibiting glycogen conversion to glucose in the liver.
Hence, the blood lacks the necessary amount of glucose leading to hypoglycemic conditions. Further, an imbalance of glucose efflux and influx also lead to hypoglycemia.
Hyoglycemia can cause neurogenic and sympathoadrenal symptoms like headache, confusion, tachycardia. or postural orthostatic tachycardia syndrome.