Abrupt change symptoms and conditions

I've been taking fosomax for 16 months. In the last 10 months I have developed a hoarse, cracking voice that has become progressively worse. An evaluation finds a blister on one vocal cord. I don't know whether it is related to fosomax or not -- but am wondering if anyone else has a similar story.

my four year old son, after only one dose of sigulair has changed. extreme halucination/dreaming that has never happened before. we can only hope it goes away!!! we are 100 percent positive it is singulair that has caused the very abrupt change.