Aby, I'm not worried about needless perfections, but I'm not here to argue the point and I'm going to back out of this conversation. I'll just leave you with a couple of things to think about... First off, having Free T4 that's too high, can also cause hyper symptoms. Some symptoms, such as heart palpitation, rapid heart rate, the chest "flurries" and throat issues you mentioned can "cross over" and apply to both hypo and hyper.
Please understand that just because a result is in the "normal" range, it's not necessarily "fine"...
I wish you the best of luck...
These are not perfectly "fine" thyroid results, obviously, because you don't feel fine... Your Free T4 is at 70% of the range, when it's recommended that Free T4 be maintained at around mid range. At the same time, your Free T3 is only at 40% of its range, when it should be in the upper half to upper third of its range. You should maintain a balance between Free T4 and Free T3 and yours is upside down; Free T3 should be higher in its range than Free T4 in its range. This imbalance between Free T4 and Free T3 can cause the symptoms you're having.
It would appear that you might not be converting the Free T4 to Free T3 adequately. Typically, when Free T4 is too high and Free T3 is too low, the protocol would be to decrease T4 medication and add a small amount of T3 medication, such as Cytomel or its generic counterpart, liothyronine.
Yes, abyz321... taking your T4 medication the morning of the blood test, prior to the blood draw can affect your labs for that draw. I just had this happen last week and because of it, I may end up having my dosage dropped, even though I have a few hypo symptoms.
I had gotten up in the morning and taken my T4 med at the usual time, shortly after 6:00 am, and had my endo appointment at 8:20 am. Because my labs had been drawn several weeks earlier with other labs and there were some disturbing results, unrelated to thyroid, my endo decided she wanted to draw new labs that morning, which I had not expected or I wouldn't have taken my med...
The previous (Dec 5, 2016) results were as follows: Free T4 = 1.1 (0.8-1.8); Free T3 = 3.3 (2.3-4.2); TSH = < 0.01. My TSH is always low, which is a constant source of discomfort for my doctors. Anyway, the new results (Jan 5, 2017) were Free T4 = 1.4; Free T3 = 3.5 and of course, TSH at < 0.01, as usual. The reference ranges were the same for both draws. The only difference between the 2 draws was that I'd taken my T4 med prior to the second draw. I was not aware that it could increase FT3 levels, but apparently, it can...
Because I took my med prior to the blood draw, my FT4 went to 60% of the range vs 30% in Dec and my FT3 went to 63% of the range vs 53% in Dec. I haven't heard from the doctor yet to see if she's going to lower my med, but I know my TSH was, literally, causing her own heart to flutter...
Yes Free T4 and Free T3 values can get affected especially if you are doing blood test without giving sufficient gap like 1 to 2 months before starting T4 dose or changing dose.
For example if you have changed dose recently like T4 50 mcg to 75 mcg and did blood test after just 1 week then chances there you see a high or normal high Free T4. This is also the reason why people experience temporary hyper symptoms when they start medication or change to higher dose etc.