Hello,
Although a pre diabetic can feel drowsy after a sugary food but even a non diabetic can also exhibit the same symptom due to
reactive hypoglycemia.
Very frankly speaking pre diabetic stage generally has no symptoms and even if it does produce symptom,they mimic symptoms of
diabetes like increased thirst,increased urination,
tiredness,increased appetite etc.
Sometimes a pre diabetic has black discolouration patch on his neck,armpits eyc called as ACANTHIOSIS NIGRICANS.
You must get your FASTING and PP blood sugar levels tested.
Fasting level between 100 and 126 is called as pre diabetic or impaired fasting level and PP sugar level between 140 and 200 is called as impaired
glucose tolerance( pre diabetic ).
Fasting level above 126 and PP level above 200 is suggestive of frank diabetes.
Lifestyle changes like dieting,exercising amped reduce piton of weight are the mode of treatment in pre diabetes and helps in preventing the person to go into frank diabetes.
Thanks