I gained between 10 and 15 pounds on Tymlos, pretty much ALL in my belly. I have NEVER had a belly before. I have always been a thin, bordering skinny, woman, generally underweight or on the borderline. I was told that Tymlos weight will NEVER GO AWAY even when off the drug, and tragically I am finding that to be 100% True! Worst of all, the other side effects were worse for me, so I couldn't go the whole course. I have since been trying to figure out how to lose this belly fat with absolutely no success. First time ever I couldn't lose weight.