I've been dealing with low T3 for about a year now. There's not a whole lot they can do for it. They think it is more of a chronic illness problem than a thyroid problem, at least for me. They just keep monitoring my thyroid levels every 3 months. My endo talked about starting cytomel but said there was only a10% chance I would feel any better. That didn't seem worth going through all the trouble of adjusting the synthroid to get it all balanced.