I´ve just started with Forteo 5 days ago. No side effects so far but I have no idea about what can happen in the long term. I´ll keep you posted on any possible weight gain, which I hope doesn´t happen in my case. If I experience any weight loss, I´ll be toasting and jumping off happiness, The treatment is annoying and long itself, so weight gain is bollocks even when, of course, bone health is more important. Let me know how are you doing with that when you start. Best wishes.