Thomas edison symptoms and conditions

I have pain in my left hip flexor when taking Lipitor. I was on 40mg/day and went on a daily walk with my wife after her back surgery. My left hip flexor would cramp. Sometimes it would cramp so bad, I had to quit walking and catch a ride home.

I had a month holiday off of Lipitor and could run after a week with no pain.

I started back on 10mg/day and the pain has returned, but not as bad.

I did an experiment- Laying flat on my back, I could lift my left leg one foot off of the floor. I stopped the Lipitor for seven days and could lift my left leg two feet off of the floor.
Can anyone help me?