yaz is horrible. i used two different bcs before yaz and the side effects were physical including back pain and migrains. i went off bc because i wasnt having sex. when i decided to go back on i was prescribed yaz. i gained somewhere between 15 to 20 lbs and i hadnt changed my eating habits. also my emotions we uncontrollable. after 6 months of trying to stick with it i stopped. within 3 weeks i had dropped most of the weight and felt good again. i look back and i hardly can remember what i was thinking. my emotions were out of control. my decison making was unrational. so angry and sad i would cry all the time. i was completely nuts. nobody should take this bc. WARNING DO NOT TAKE YAZ. it will ruin your mental and physical health.