Your friend with diabetes feels unwell and cannot remember when insulin was last taken. What should you do first?

Explanation

One of the most dangerous causes of a diabetic feeling unwell is low blood sugar, which sugar or a sweet drink quickly corrects, while if the sugar is high, a little extra sugar does no significant harm. When it is unclear when insulin was last taken, another injection could lower the sugar even further, and resting for a few hours just wastes time.