: I've been on fosamax for about one month. After taking it, I experience a dull ache in my kidneys and feel continual pressure to urinate with hardly any output. (am going to discuss this with my doctor) Is this happening to anyone else? Been on Fosamax for 3 years and had to get off due to bad bad stomach problems. Also tried new drug called Actonel, same problem. Need another option? Help!!!