Why must you feed someone something sweet if they had inadvertently taken an overdose of insulin?

If someone has taken an overdose of insulin, you should not feed them anything, not even something sweet. Injecting them with Glucagon is the recommended course of action. However, if Glucagon is not available, feeding them something sweet is actually discouraged. Instead, call emergency services immediately and lay the person on their side in the recovery position. It is important to wait for professional help to arrive.