Brief Answer:
Thyroid
Detailed Answer:
1 You are probably referring to 'hypothyroidism' (and not 'hyper'thyroidism as you have typed above, perhaps inadvertently) when you say you have symptoms like
fatigue etc and you feel you are not getting enough.
I respect your research of the subject and your thoughts on individualized targets.
However, the latest guidelines from the ATA (American thyroid Association) continue to emphasize a general range of normal as 0.45 to 4.12 although one should also go by the range specified by the respective laboratory.
2 Regarding doubling your dose, which made you feel better........my answer is that it is not a good idea to do so.
Because it can be harmful to your body as it can induce a state of 'hyperthyroidism' ie you would be getting much more than your body needs. This may not always produce symptoms such as heart racing, palpitations, sweating,feeling hot,
diarrhea,
weight loss and feeling nervous etc But it still can have damaging effects such as bone loss and heart rhythm problems.
Besides, it is not advisable to increase the dose by 50 mcg at a time. Most endocrinologists do it in increments of 12.5 to 25 mcg at 6-8 week intervals going by how you feel as well as lab results to target
TSH and free T4 in the optimal range.
3 I see you have reported a strong family history of the condition. However, for my patients, I still like to do a once-in-a-lifetime documented anti TPO antibody and anti-
Thyroglobulin antibody result, unless I have seen a grossly abnormal TSH of greater than 20. This approach allows me to ensure the individual has permanent hypothyroidism from Hashimoto's disease as opposed to a temporary 'Thyroiditis' that often recovers to normal.
4 Brand has the advantages of providing consistent batch to batch strength of levo
thyroxine. This is not always the case with generics which may have potential variability in percentage of precise levo thyroxine in the medication depending on the supplier's choice of procurement sources.