If you left the correct time gaps as Jaydee has mentioned, then it does depend on how you feel. It's very individual where those of us on combo meds need our T4 and T3 levels. Some are fine with low FT4 as long as FT3 is in the upper part of it's range, some of us need both FT4 and FT3 fairly well balanced over half way through range.
There's no one size fits all with combo meds but what is common to almost everyone taking combo meds is that TSH is likely to be very low or suppressed because that's just what taking T3 does.
Having a suppressed TSH isn't the end of the world but there is debate among the thyroid community and the professionals as to how is can affect you long term. Some are of the understanding it can increase the chance of arterial fribulation and decreased bone density. Others disagree with this.
Joey82, I am booked to have an NHS bone density scan in August. I have always had strong bones but have not had a scan since my TSH dived below 0.01. I also take medication for trigeminal neuralgia which can affect bone density negatively, so I need to know the impact of both. All I read about atrial fibrillation makes me think it is a common problem in the wider population and is usually undiagnosed. I have two friends who have been close to death with it - neither has any throid problems.
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