TSH dropping ...whole body response?

[brws]

My thyroid was treated with radioiodine about 10 yrs ago.  Currently on synthroid .125.  On March 08 tsh was 4.5, on April 09 tsh was .498.  Just had labs done again yesterday and they aren't back.  Important to note that I also have a heart condition (PSVT) current cardiac appoint showed good results.  I am now very short of breath, feel a lump in my throat, very lethargic, anxious, heart rate yesterday was over 100 (normally around 70). Non-exercise related weight loss of 50+ lbs in 1.5 years (now I am under weight at 117 lbs)...because of food allergies. What could be causing these symptoms?  I am barely functioning at this point and I am only 36 yrs old.

[Anu17]

you have all the symptoms of hyper. thyroid .your endo will reduce your dose definately he/she will have to adjust your dose.I get this when i am hyper and when i adjust my dose i am o.k . I totally understand your frustration .My whole summer was so up and down with my thyroid being so wacky all the time .I had all this symptoms and when check  my blood work  my TSH was .01 .
take care

[goolarra]

I have PSVT, too (Wolff-Parkinson-White syndrome).  Please post your labs when you get them.  Also, post the reference ranges for FT3 and FT4.  It sounds to me like you are overmedicated.  That much weight loss can require a decrease in meds.  You lost almost 1/3 of your body weight.

Is your PSVT under control?  With or wothout meds?

[brws]

I'm thinking its over medication too.  The scary thing is I had been non-compliant ....only taking my Synthroid .125 every couple of days ~ imagine if I was being a good patient.  My PSVT seems to be okay.  My cardiologist checked me out a couple of months ago and was very pleased.  I have tachy sometimes and of course you now how scary that is.  How is your PSVT?

[goolarra]

Well, I went through a very rough PSVT period when I was first on levo.  My PCP (former!) started me on 88 mcg, which was way too much, and the PSVT went wild within a couple of weeks (which she had, of course, assured me was impossible).I had to cut back, eventually to 25 mcg, and I was still having PSVT multiple times a day.  I finally started on a beta blocker to get the PSVT under control, and then could raise my levo very, very slowly.  

I'm now on 75 mcg, which has been stable since January (she started me at 88!!!), and I have had to increase the atenolol (beta blocker) to 50 mg during the increases.  I've achieved somewhat of a balance.  My PSVT is pretty good (knocking on wood here), but not as under control as it had been all of my adult life before starting levo (and under control without meds).  There is a maneuver (this has a name, which I can never remember) that my electrophysiologist recommended to stop the PSVT.  Do you know it?