Tsh .198 FT4 1.3

[MJ62]

Just had my semi annual blood work done for my Synthroid refill and received these results.  Referenced range for TSH Is .350 - 5.00,  FT4 standard range is .8 - 1.5.  Currently on 650 mug of Synthroid per week.  Dr says no changes are needed.  I have been on Synthroid for several years following a lobectomy due to a nodule and have been relatively stable on my meds for many years.  I have been experiencing some additional symptoms which I attribute to menopause and some not.  Would love to learn if there is a chart somewhere that I can plug my numbers in to and it will tell me if I should be requesting a change in meds.  
Any input is greatly appreciated.  

[goolarra]

Your FT4 is at 70% of range, and the target for that is more like 50%.  It seems like you might be taking a little too much T4.  Also, as you know, your doctor should be testing FT3.  

Was your doctor aware of your heat intolerance and anxiety symptoms when he decided to leave your meds alone?  

You said you'd been on a stable dose for years, but our demand for thyroid hormones can change over our lives.  Menopause is one of the changes that can require a thyroid meds adjustment.

[MJ62]

No other tests were run.  I have experienced some heat intolerance as well as low grade anxiety feelings.  The ranges listed were from the lab report.

[goolarra]

Reference ranges vary lab to lab, so there is no such thing as a "standard range".  Is that from your own lab report?  FT3 wasn't tested?

Are you having hyper (overmedication) symptoms?  It's really how you feel that determines when a change in meds is in order.