The birth control patch is a small plastic square-shaped patch that is worn to prevent pregnancy. The patch works the same way as the birth control pill. It slowly releases the hormones estrogen and progestin through your skin. These hormones are similar to hormones already made by your body. If used perfectly (i.e., no missed patches, patches applied and changed correctly), the patch is more than 99% effective at preventing pregnancy (92% with typical use).
The patch works in three ways:
The patch can be started during the first five days of your period, the first Sunday after your period starts, or by the "Quick Start" method. Talk to your health care provider about the method which is best for you. Always use a backup method of birth control (i.e., condoms) for the first seven days of using the patch as it can take time to become effective.
The patch may cause:
Symptoms usually go away within the first couple of months, but if symptoms persist you should talk to your healthcare provider. The patch may also cause skin irritation at the site of the patch. Changing the patch site each week can help prevent irritation.
Hormonal birth control like the patch can increase your risk of a blood clot. Even though this is a rare side effect, it is important to be aware of the warning signs of blood clots. If you experience pain, swelling, or redness in the legs, severe headache, chest pain, shortness of breath, changes in vision, or abdominal pain while on the patch, seek medical attention immediately.
If the patch has been off for less than 24 hours:
If your patch has been off for more than 24 hours please see Missed Birth Control- Birth Control Patch (Evra™) health information sheet or Stay On Schedule app at www.sexualityandu.ca.
Not sure what to do? Call the KFL&A Public Health Sexual Health Information line at 613-549-1232 or 1-800-267-7875, extension 1275 for more information.
Some women are not able to use the patch, including women with a history of blood clots or women over the age of 35 who smoke. Talk to your health care provider to see if the patch is right for you.
You can get a prescription from your family doctor or at a clinic. Contact the KFL&A Public Health Sexual Health Information line for more information.
Remember that the patch does not protect you from sexually transmitted infections (STIs). If you have made an error in using your patch and have not used back-up birth control, ask your healthcare provider, pharmacist, or KFL&A Public Health about emergency contraception (Plan B). Condoms are the best way to protect against STIs.
Revised: 2016-01-18