What Does Pain Under The Ribs On The Right Side Indicate?

I recently had open heart surgery and was prescribed a variety of cholesterol reducing meds. I just did a follow up with my provider and was re prescribed the medicine Ezetimibe 10 mg. I didn t restart the meds right away, but now that I have, I am experiencing bad pain in my right side , wrapping around from about the middle of my back under my ribs and into my abdomen. I am having like bad soreness in my joints and muscles as well. In the past, I have not been able to take any type os Statin drug due to similar disabling pain. I am just trying to find some answers or explanations as to why I have so much pain taking cholesterol meds?