Evenity is not like Reclast in that there is not usually, as I understand it, an "acute phase" (immediate) reaction but instead, side effects tend to happen at the peak of action, around one week. The tylenol and antihistamine would seem to address reactions similar to the acute phase reaction that happens with Reclast. Is anyone having that with Evenity?

I did have an immediate reaction that was more akin to allergy, since I am sensitive to polyethylene glycol, which is in Evenity (and some vaccines). This, I was told, was more than unusual. Right after the shot I got strong burning sensations in my tummy and chest, which did not recur when I had shots in my thighs. I differentiate that from some effects I experienced 7-10 days after the Evenity shots.

So are people having an acute phase reaction to Evenity that explains the tylenol and antihistamine?