Recent research suggests that cinnamon may be helpful as a supplement to regular diabetes treatment in people with type 2 diabetes. Hence your husband needs regular antidiabetes treatment along with the cinnamon pills.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.
if he is type 1 then his main medication will be insulin. If his blood sugar is high then he needs to adjust his insulin.
Cinnamon may have only minor benefit, though it probably won't hurt.