I have only been on 25mg of Levothyroxine for 3 weeks. All seemed to be going fine, I had better mood and my brain just seemed to be functioning a bit better.
But yesterday I went for a run, the first run outside in a few weeks although I do go on a treadmill for 15mins warmup when I go to the gym.
Oh oh, something was wrong in the first 10 yards, there was no pain but all my joints just felt very delicate, I couldn't run properly anymore and my gait was like a 80yr old mans. I tried to push on thinking it would get better as I warmed up but no, something was very very wrong. I had to stop after 400 yards and walk home. I am a very fit 52yr old who a month ago could run a marathon at the drop of a hat.
Is this the Levothyroxine? nothing else has changed in the last few weeks.