Evra patch contains contains norelgestromin 6 mg and ethinyl estradiol 0.60 mg in the middle layer, releasing approximately 200 µg norelgestromin and 35 µg ethinyl estradiol every 24 hours. This is a contraceptive (birth control) patch that is worn on the skin. The medication is continuously absorbed through the skin into the bloodstream. It is a combination contraceptive that contains 2 hormones (norelgestromin and ethinyl estradiol) to alter the female reproductive cycle. This medication prevents eggs from being released by the ovaries and changes the cervical mucus, making it harder for sperm to swim.