premenstrual dysphoric disorde
"I've been taking Yaz for two years for Premenstrual Dysphoric Disorder (PMDD), combined with a low dose of Prozac.  It has been a great combination for me.  I used to have extreme mood swings about a week before my period, even to the point of getting myself in trouble at work.  Now, I hardly feel my period coming on and it's smooth sailing all month."