Re: T4 lab range question
Between 50% and 70% is enough for most people. My own FT4 is only 40%, but my FT3 is 70% and that's carrying me along, I think.
Since her options are limited, perhaps trying another brand of T4 would work better for her. Some of the generics are reputed to be less potent. That might soften the blow to her system, you know?
I have seen people here who take only 25 mcgs; but then, if they were doing well with that, they wouldn't be here reporting trouble. Most often though, 25 mcgs is only enough to decrease TSH without raising the all-important thyroid hormones. Lowering TSH without raising FTs makes the hypo worse, because it decreases the remaining natural thyroid function without adding back enough hormone to do any good.
Wish I had a better option for her. It's a tough spot to be in.