Why are you on a water pill?
It depends on how low your Free T3 level is and how well your body converts the T4 to T3. Even if the 100 mcg of T4 is an adequate dose, and your body adequately converts T4 to T3, it takes about 4 weeks for T4 meds to get up to 90 % of the final effect on blood levels.
Of course what you are trying to achieve is to get your Free T3 high enough to relieve symptoms. That may require some gradual tweaking of dosage. In general it is not a quick process, but you should start feeling some benefit along the way. When did you start on the 100 mcg of Synthroid?
Don't forget that the first step should be to get all the additional testing done.
how long can this take to get back to normal, I was 125 and put on 23 lbs in 2 weeks of water I hurt so bad
my T4 free is low should be0.77-1.50 and mine is 0.37 don't know much about this all I know I am scared to death I have a lot of medical issues and really don't need this the meds I am on is water pill and synthroid 0.1mg (100mcg)
Once you get back into normal range your muscles will also feel normal. I have found that the worse thing with thyroid issues is being patient. The best thing I have found.......Im learning patience. I would be hypo and think i was getting better than Id be hyper. its ***** but once happy medium is found.....Life is good!
The first thing you should do is understand that TSH is totally inadequate as the diagnostic by which to medicate a hypothyroid patient. That is because TSH is a pituitary hormone that is affected by so many variables that it cannot be shown to correlate well with either of the biologically active thyroid hormones, Free T3 and Free T4, much less with symptoms, which are the most important.
So, you really need to be tested for Free T3 and Free T4 (not the same as Total T3 and T4), along with TSH. Also, since hypo patients are frequently deficient in other important areas, you should be tested for Vitamin D, B12 and ferritin. If the doctor resists, just insist on it and don't take no for an answer. It is that important.
Since the the most common cause of hypothyroidism is Hashimoto's Thyroiditis, you should also test for the thyroid antibodies. Those tests are TPO ab and TG ab.
When test results are available, please get a copy of the lab report and post results and their reference ranges and members will be glad to help interpret and advise further.
You also need to know that a good thyroid doctor will treat a hypo patient clinically by testing and adjusting Free T3 and Free T4 as necessary to relieve symptoms, without being constrained by resultant TSH levels. Symptom relief should be all important, not just test results, and especially not TSH results. Many members report that symptom relief required Free T3 to be adjusted into the upper third of the range and Free T4 adjusted to around the middle of its range.
What medication are you taking for the hypothyroidism and what is the dosage ?