Yes, I began with Tymlos in late November and the weight gain began in earnest by February. I switched to Forteo in April as I couldn't take the side effects of Tymlos and that's when the weight and the belly appeared. And, yes, soooo distressing and I know its health over vanity, but, still...

I called the mfr and they claim having never heard of this before, despite me reading it on every forum like this one and my primary doc saying she's heard the same from others. Trouble is, they did the clinical research 32 years ago and, unless we all begin dying from this thing, they don't ever go back and keep monitoring and retooling the product to optimize it.
Best of luck to you.