I am so glad that I stumbled onto this website. I have been feeling bad for over 1 1/2 years with unexplainable symptoms all of which started around the time that I was put on Lisinopril/HCTZ 10/12.5 to help control my HBP. I started out with flu like symptoms, that progressed to terrible headaches onto chest pain that sent me to the ER. I thought I was having a heart attack. I've been to see every kind of Doctor you can name: neurologist (headaches) allergist,cardiologist (heart doctor), hematologist (bloodwork), rheumatologist (to rule out Lupus) all of which can't seem to find anything wrong with me. I mean nothing. I specifically asked my doctor some time ago if my symptoms could be could be related to the new BP meds and he told me "NO". After reading these testimonials, DON'T THINK HE'S RIGHT. I'M GETTING' A NEW PRIMARY CARE PHYSICIAN!!!!!