Norethindrone
"I've been on this medication (Nora-Be) for a little over a month now and my only complaint is that I have no idea when I'll get my period, the random spotting and the length of the period. Each time I have spotting, I'm not sure if it's my period or spotting then when I finally got my period, I had no idea how long it would be (still having it 6 days later). One of the main reasons I went on birth control was to control my period, since I have migraines however, I'm no longer allowed (per PPNE) allowed to have estrogen in my birth control which takes out that ability to control my period. Beyond that, no other side effects (i.e. weight gain, breast tenderness). I'll report back if that changes over the next few months."