I have been on lisinopril on and off for over 2years or better.I started with 20 mg.then i cut that down to 10 mg. then to 5 mg, still feel bad,that includes 6 mg.hctz.many side effects,muscle weakness,neck pain,cramps in legs mainly,and just feeling like your about half sick all the time, have to force myself to move because of feeling tired and aching all over, if i work in my garden i have to sit and rest every 5 minutes because the muscles in my back start hurting and get weak,blurred vision, itching ,bad dreams,irritable( my poor wife) etc. Also take metoprolol 150mg. per day and have for a lot of years which also has side effects.Tried taking hypavera which is a natural herb mix after 2 days bp went up to 204/94 so stopped that fast so be careful on mixing certain vitamins and herbs with prescription drugs.