underactive thyroid
"This is a follow up review.  I originally gave this 7 stars after a couple hopeful weeks.  I also quit smoking and started exercising, among other things, which was the main reason for feeling better.  This medicine does improve your TSH and T4 tests which are good tests to make your doctor happy, but will NOT improve your symptoms.  You need to improve your T3 levels to improve symptoms.  I monitored T3 (total and free) for 7 months on this medicine, and my T3 did not BUDGE. Apparently this is a case with a lot of people, so check those numbers! You will get no symptom relief if this medicine is not converting from T4 to T3. "