For about 3 months after my first Reclast infusions, I had intermittent pains moving through different parts of my body. One shoulder locked up on me, I wasn't able to turn my head for a few days, there was pretty intense pain in my right calf muscle. After about 3 months this ' floating' pain disappeared. I had the other 2 infusions the following 2 years with no side effects at all. With bone density testing afterwards, there was quite a notable strengthening of both my right hip and spine. It is a big decision getting infusions and also continuing with the whole course. I hope that your discomfort subsides and that your final outcome is as positive as mine.