I had the same issues. have always been regular even since stopping the pill (due to dvt and PE) but when i started on all the lupus meds last year it threw me out. I freaked out big time just after starting it because i was 2 weeks late. talk about anxiety attack. but it came and my doc said that amongst all the medication i take in combination with lupus, it can throw your cycle out a bit. but ive been on plaq for over a year now and im regular again and have been for a while. the only thing i notice is that i get bad cramps!
Diagnosed with SLE and Antiphospholipid Syndrom - June 2010