The primary efficacy study for Beyaz was a multicenter, double-blind, randomized, controlled U.S. trial in 379 healthy women age 18 to 40 who were treated with Beyaz or YAZ alone for up to 24 weeks. Beyaz was found to increase folate levels in women. In a German study of Beyaz, folate levels remained elevated for several weeks following discontinuation of Beyaz.  Safety and efficacy data for contraception, PMDD, and acne indications were obtained from previous YAZ clinical trials.

The most common side effects reported by users of combined oral contraceptives are irregular uterine bleeding, nausea, breast tenderness, and headaches. Other serious side effects include vascular events (blood clots) and liver disease.  Women over age 35 who smoke should not use this product as cigarette smoking increases further the risk of serious cardiovascular events.  The common adverse events for Beyaz are expected to be the same as those for YAZ.  There were no findings from the clinical trials with Beyaz to suggest a change in the overall safety profile compared to that of YAZ.

SOURCE U.S. Food and Drug Administration