"i was on yaz for about three months. i became moody, emotional, it gave me headaches, lowered my sex drive, and gave me anxiety. i just did not feel like myself on this pill. i have since switched to loestrin and so far, its been good. no side effects yet. i&#039;m feeling like myself again. my sex drive is still not what it used to be but i understand that most birth control pills cause a decrease in libido. i personally do not recommend yaz but i know that each pill works differently for different people, but my friends that were on yaz said the same things that i am saying."