Yaz is an oral contraceptive used by women to prevent pregnancy. It has also been indicated for use of premenstrual dysphoric disorder and for the use of acne in women at least 14 years of age. It should be used for acne only if the patient desires an oral contraceptive for birth control.


Yaz may increase the risk of serious cardiovascular defects if used while cigarette smoking. The risk is increased with age, and Yaz should not be used by women over 35 years old. Many adverse effects experienced by women have been related to a relative excess or deficiency of the estrogen or progestin components of these formulations. Mild to moderate side effects range from slight cramping to moderate nausea, and severe side effects may include migraine headaches, uterine bleeding and kidney disorders.


More than 10,000 women have filed lawsuits against Bayer, the manufacturer of Yaz, for its harmful side effects. Bayer has reportedly settled 3,940 cases for $750 million, with thousands more pending in federal and state courts nationwide.