I have been taking 10mg of Lisinopril once a day for about a month, at 1st I was prepared to become dizzy due to the warning on the label, however, that never happen. I continued to take it and noticed I was just tired all the time, walking short distances - I became very fatigued in my legs, I would wake up coughing almost choking, terrible headaches which wouldn't go away, feeling bloated, sinus pressure, I would wake up with my head just pounding, increased body temp, but would also get cold really easily. I just thought maybe it was me and perhaps I just wasn't sleeping enough or stressed out, couldn't really understand why I was feeling this way. This weekend, was the worst, I could tell there was something wrong, I couldn't do anything without my blood pressure rising --- my head was killing me. I stayed still most of the day and took aspirin to try to ease my headache. Nothing seem to work, my husband was so worried he wanted me to go to the ER. Being I know it takes a long time in the ER I really just didn't want to have to sit for hours in a waiting room, I didn't go. I started thinking about when I started getting these symptoms -- it was around the same time I started taking Lisinopril. So I looked it up online and saw the side effects - I decided I'd stop taking it. The next day, my headache went away and I've been feeling better since I stop taking it. I know my blood pressure is still high; which is why I was taking this medication to begin with, but it isn't bad as it was when I was taking it. I'm not sure if it can cause your blood pressure to increase, but for some reason mine did. I called my doctor's office today, my doctor isn't in, but I'm not going to be taking this medication any longer. Thanks to everyone who has posted about your experience - maybe it's not all in my head!