I have high blood pressure which came on quite suddenly within the last two years. I am generally healthy , not overweight, low cholesterol, don t drink much or smoke, and fairly active. It fluctuates a lot but on average is about 160/105. My doctor has prescribed ACE inhibitors, but so far (About 10 days) they have had no effect on my blood pressure, while making me feel fairly ill - light-headed, mild nausea and headache, difficulty concentrating. Should I persist with the pills or ask for something different?