Lybrate-user, the condition being described looks like he had an attack of hypoglycemia. Did you check his blood glucose level then? if blood glucose level goes below 70 mg or lower like <60 mg or even lower, patient may get such attacks. It is important to achieve a strict blood glucose control, but equally important thing is not to allow episodes of hypoglycemia. Severe hypoglycemia can be very dangerous, particularly in elderly persons. If you have a glucometer at home, it is better to check glucose level. If it is low, then it is essential to give glucotabs 2 or 3 tabs cor candy, sugar ar some sweet etc can help. Thanks.