Is was on norethindrone ace for several years as I was anemic and this improved with this drug stopped my periods this. This past May my gynecologist felt as I was 53 years old that I was probably now in mental pause so he asked me to stop taking it. I did so. 3 to 4 weeks later I had a heavy. That lasted a week. Then I had nothing for five months. Starting the middle of November I started having light bleeding. I called the gynecologist he told me to go back on the norethindrone ace and I did so. Starting five days ago I have had a very heavy. With clotting. I will call my doctor when the office is open again after the holidays.