Never say never to bizarre side effects from anything, because I have certainly had them, but I have been on thyroid replacement for 13 yrs & this just started about 2 weeks ago...strange, like going through puberty even, & if it were a possibility, I would be taking pregnancy tests, because the change has been so drastic. But, I know there is no chance of pregnancy, so I'm just seeing if anyone else has had anything like this happen?!?!