I asked my doctor for a Viagra prescription out of curiosity, I did not nor do I have ED. He said I must have a low libido, which was incorrect. He ran a TSH panel, which indicated a 4.34. Normal range is 0.4 to 4.0. I was placed on 25mcg which increased to 100 mcg over a 1 year period. My number over the past 5 years has been between 2.67 and 2.98. I have been experiencing feeling hot at night, itching, difficulty falling asleep and heart palpitations. Symptoms of over-treatment? What do you think? I am 60 years old and have been running 2-8 miles daily since I was 28 years old, and have not experienced any other health issues.