I have been on Zocor, Lipator and now I have been on Welchol for ...

I have been on Zocor, Lipator and now I have been on Welchol for over a year and then the Dr, added Zieta as a booster....It seem s to have lowered my cholestral to about 210, but I have severe lower leg cramps. I thought it was a form of arthroitis, but after reading all of the responses in this web site I am rather concerned. My Dr. seems to think there are a lot of side effects in all the cholestral drugs. What do you recommend? Thanking you ibn advance for your response to this email.