taken from the patient's information leaflet
Insulin or Oral Hypoglycemic—Initiating thyroid replacement therapy may cause increases in insulin or oral hypoglycemic requirements. The effects seen are poorly understood and depend upon a variety of factors such as dose and type of thyroid preparations and endocrine status of the patient. Patients receiving insulin or oral hypoglycemic should be closely watched during initiation of thyroid replacement therapy.
Naturethroid in the UK?
Trial of Naturethroid 
Ndt and insulin resistance 
