So I had posted a thread as I was having trouble also.
When I first started ndt I felt great for a shirt bit and then it dropped off. Over many months I couldn't get the right dose.
As stated earlier, I did a ton of reading and happen to realize that the way my lab numbers were reading and from what i lewrned on a site somewhere that I needed to drop the ndt and go with straight liothyronine.
I discussed with my doc and that's what we did.
Started with a few days of 1/2 grain then a couple weeks of 1 grain and then 1.5 grains which I've been on for a couple of months now.
I feel really really good.
I also take it at bedtime instead of morning because of the usual not eating for 30-60 minutes there's things like vitamin c which you can't take within 4 hours of thyroid meds....there's a couple other things too I think and I basically couldn't take a pre workout, so I switched to taking at night.
It's been a long time and a struggle but I think I'm stabilized finally. I have normal energy now from morning to night. It feels good.