My brother is a diabetic so i have some good knowledge about diabetes.
ECA doesn't increase blood sugar level; sugar does
The 2 things that decrease blood sugar level are:
1) Insulin
2) Excercise or a fast metabolism
The regular range for the blood sugar level is 70 - 140
Symptoms of off range sugar levels include shaking, sweating, blurred vision, etc.
Since ECA increases metabolism I would advise that when she takes them to monitor her blood sugar level and make sure she doesn't have the symptoms of low blood sugar. If she does have low blood sugar then she should take somthing sweet to counter act that. My advise is to not to take ECA since diabetes is a very dangerous disease. It could cause comas and sudden death.