I've tried a couple of times to switch to Benecar from Accupril. I've been on Accupril for years. Benecar makes me extremely tired. So much so it's a struggle to get out of bed and go to work. Also after 5 or 6 weeks I developed unbearable joint pain. I can't say that I have ever experienced rapid heart beat with Benecar but the side effects have ruled it out for me. I meet more new acquaintances all the time that are being treated for high BP with medication. I wish that I had maintained a reasonable weight and never started meds..