I found Tymlos to cause constipation. I've been taking it for almost one year. I had a little nausea at first, but that stopped pretty quickly. Constipation, however, is an ongoing problem. I add oat bran to my breakfast cereal and try to eat high-fiber foods. Stool softeners also help me.
Good luck! I hope you don't have this or any other problem with Tymlos!