Everything I've read and heard from friends....once you come off of Tymlos or Forteo, you almost have to go on something else, as T-scores will once again drop. That tells me that the 'improved t-scores' while on these drugs are due to false readings. If bone density improves, it shouldn't get bad once again when you drop the drug. My dr is strongly advising me to go on Forteo....I'm scared to death of the side effects.