I also had Reclast infusion 2 month ago and I followed all the precautionary steps of hydration before and after, Tylenol. I had extreme reaction to it for the first week I had flu and fever symptoms. and since I have joint pains in my knees, elbows, hips and muscle cramps in my legs, and arms. I was very healthy before, and rarely had any pains. Now I feel I am becoming handicapped. I reported all this to my doctor, but he just tells me to take pain killer medication, and wait.