Your wife is already on 3 different types of Oral Drugs for Diabetes
Mixtard. She is also getting Iron , Calcium and B complex vitamins
It is not wise to treat through online , my suggestion is that your wife's sugars are not under control. She may need more Insulin , better you consult a Diabetalogist/Endocrinologist
while modifying the treatment she needs repeated blood sugar checkup .
take care & all the best.