@babs10 I am late to the party here but I had to request a CTX from my doc after about 1 year of Fosamax and before I did reclast. He somewhat reluctantly (maybe I read him wrong) did. Very low CTX (about 58). Had my 2nd once a year DEXA before Reclast; some improvement in T scores but not enough, thus Reclast. One year after Reclast at CTX 78; he was very happy with that. I was shocked when he said no DEXA for another year, and I am due for a second Reclast infusion in July, apparently without knowing via DEXA if the drug has worked at all, a little, or a lot. Treatment wouldn't change regardless I was told. Beyond zero sense.