I'm 54 and started Toprol 6 months ago. I am experiencing memory...

I'm 54 and started Toprol 6 months ago. I am experiencing memory loss and weight gain that won't go. Count calories and walk but to no avail (weight stays on). I started taking this drug due to fast pulse due to mitral prolapse valve. My legs hurt especially at night while lying down. Can't tell if its Toprol or the Zetia for leg pain. I know I had a bad reaction to the cholestrol med Zorcor. Dr. claim all is good but I'm not feeling it. I want off!!!