My losartan tablet has changed from round white to elliptical green very recently. I am having bad joint and muscle pain and generalized muscle weakness. Trying to determine if this could be the cause. None of my other meds have changed (atenelol/chlorthalidone, omeprazole, simvastatin, levothyroxine) recently, and have been on 1 mg anastrozole for the past 15 months pursuant to breast cancer. I am miserable, and can t find any other cause. Info?