•Patch is applied once a week
•99% effective at preventing pregnancy when used perfectly
•Patch stayed on the skin for 95% of people in studies
•Raises your risk for serious blood clots
•More estrogen is absorbed compared to other combination birth control pills, which might cause more side effects
•Might not work as well for people who weigh more than 198 pounds or have a BMI of 30 kg/m² or higher