Confusion, abnormal behavior or both, such as the inability to complete routine tasks
Visual disturbances, such as double vision and blurred vision
Seizures, though uncommon
Loss of consciousness, though uncommon
Hypoglycemia may also cause these other signs and symptoms:
Heart palpitations, Shakiness, Anxiety, Sweating, Hunger.
These symptoms aren't specific to hypoglycemia. There may be other causes.