Actually, Lynda I don't have T3 and T4 numbers. He only does TSH and has ever since my very first visit 5 years ago (when he ordered a more comprehensive set of tests as I was a new patient then). My TSH was 1.71, "well within normal," he said. Dr. Davis says we should look for "ideal" rather than "normal," and anything over 1.50 is indicative.
I wish I knew how to find an MD who would more fully test. If it comes back normal, then you haven't lost anything except $$. My doctor says that if I'm not having symptoms (such as temperature preference and hair loss), then the hypothyroidism is well-controlled and he's done a good job. I otherwise like the physician's practice, and I have liked him (thought he was very scientific until he poo-poo'ed the journal articles I brought him this morning).
Really, I don't see any harm in adding T3 to my T4 prescription, even if just for awhile to see if there's an affect in my ability to lose any weight. Funny he didn't have any problem writing a script for Metformin (off label because I'm not diabetic or pre-diabetic) to see if it would help me. It didn't and made me very sick most mornings.
Sorry for venting y'all. I'll be looking for other solutions.