"I've taken this medicine since January 2010.  It controls one part of my blood pressure but not the lower number.  When taken with Cozaar both are under control.  However, recently I have been having problems with dizziness and confusion.  One day I forgot to take my medicines, left my pill box at home and found I had NO confusion that day or dizziness.  My concern is that I am developing a tolerance to these medicines which has happened in the past for me.  It is good for controlling blood pressure but these new side effects are scarring me."