http://www.medications.com/effect/view/33939 I have a 16 year old daughter that has always been extremely healthy, very out going, very happy and energetic...until YAZ! My daughter was put on Yaz for irregular periods, it was nice that it helped her (very) mild acne. The first couple of months were Mon, 01 Sep 2008 21:46:03 -0400 http://www.medications.com/effect/view/33939?item=11856 I was taking Yaz a few months ago. It made me extremely sick. I lost over 35 pounds in 2 months. I had crazy mood swings and bouts of depression. I got off of it and I feel much better. I am back to my normal weight. I have irregular periods but I'm health http://www.medications.com/effect/view/33939?item=11856