I been on Lisinopril for about a year. I have full hip replacement surgery in January of 2014, after about 6 months i started getting realy bad headaches when taking it. So i would skip a couple of days and took a half. I woke up with another headache. Called my doctor and she advised me to stop taking it and watch my BP and make an appointment to see her. I'm really scared, my mother went off her BP and suffered a major stroke ..