I have irregular periods since a yr. My scan reports are normal have thyroid and taking 125 mcg eltroxin. If I take even a single tablet primolut n I get normal periods in 7 days but without the tablet don't get periods even in two months (before that I used to get periods every 20 days.) what should be done? Am taking rajah pravartani vati since 35 days (started after last cycle) 2 tabs per day but have not yet got my periods. And is primolut n safe? Why is that even with a single tablet my periods are normal but without them no periods?