J.S.
My OB/Gyn says it is fine. I have really bad Endometriosis and am in tons of pain everytime I get my period, so she keeps me on pack after pack of pills for 6 months, so that I only have 2 periods a year.
I have read a few things that say this can cause Blood Clots, but I have spoken with her about this and she says No, and have had 2 friends aske their Doctors who say no as well.