I have been taking Aviane for several months. My sex drive has diminished quite a bit and I am having trouble losing weight. In the past I've lost weight pretty easily by eating less and exercising, but since I've been taking the Aviane, it's been a struggle. I was on Yaz for awhile, but switched to Aviane because it's a $10 co-pay vs. $50, but I'm not sure it's worth it. Tomorrow I am going to call my doctor to see if I can switch back to the Yaz...