Lisinopril
"I've been taking lisinopril 5 mg once daily since April of this year   In July my endocrinologist increased me to 5 mg twice daily.   In October I started getting headaches    At first I thought it was just seasonal allergies and sinus problems    The headaches have gotten horrible I can barely stand them and sometimes they make me dizzy   I haven't really noticed a big difference in my blood pressure either  so today   I'm contacting my endocrinologist today to see if she can make a recommendation for something else     I didn't realize that headaches were a side effect of this medication until I logged on to find out if it was possible it could be the lisinopril    I have never experienced headaches like this"