Effectiveness in Preventing Pregnancy
- Of 100 women who use this method each year, about nine may get pregnant.
- The risk is smaller in women who use the patch correctly (and apply it to the skin at the right time).
- You put on a new patch and take off the old patch once a week for three weeks.
- During the fourth week, you do not wear a patch and your period will probably begin.
Visit to health care provider needed?
- Yes, prescriptions are required for the patch.
What is the birth control patch?
The birth control patch is a thin, beige plastic square about two inches across that looks like a Band-Aid. It contains progestin and estrogen-hormones found in most birth control pills. Hormones are chemicals that control how different parts of your body work. The patch has a sticky side that can be attached to the skin of the stomach, buttocks, back or upper outer arm.
The hormones in the patch are absorbed into the bloodstream through the skin and prevent pregnancy by keeping the ovaries from releasing eggs. The patch also causes cervical mucus to thicken and the lining of the uterus to thin. This keeps sperm from meeting and fertilizing the egg.
The patch is sold under the brand name Ortho Evra.
How do I use it?
You put a new patch on each week for three weeks (take off the old patch and throw it away). During the fourth week, you do not wear a patch and your period will probably start. After the fourth week, start over again and put on a new patch (even if there is still some bleeding from your period).
- To help you remember, try to put a new patch on the same day each week.
- Put the patch on clean, dry skin and press to make sure it will stay on. Be careful not to touch the sticky side while putting it on your skin.
- Look each day to make sure the patch is still in place.
- It is okay to bathe and swim while wearing a patch.
- It is better not to place the patch on a breast.
If the patch comes loose or falls off, you may need to use another method of birth control, like a condom.
Discuss your medical history with your health care provider before using the patch and let him/her know if you develop any side effects.
Drawbacks of the patch
- Does not protect against sexually transmitted infections (STIs), including HIV
- Requires a visit to a health care provider and a prescription
- Certain medications such as Rifampin (taken to treat tuberculosis) and supplements (such as St. John's Wort) may make the patch less effective.
- It may take a month or two after stopping the patch before normal periods return.
- Some women experience skin irritation where the patch is worn. Others may have breast tenderness.
- It exposes users to higher levels of estrogen compared to most combined oral contraceptives (birth control pills).
- It is not known if serious risks, such as blood clots and strokes, are greater with the patch than with birth control pills and the vaginal ring due to the greater exposure to estrogen.
Centers for Disease Control and Prevention
- Unintended Pregnancy Prevention: Contraception
- United States Medical Eligibility Criteria for Contraceptive Use, 2010
- Robert A. Hatcher, MD, MPH et. al., 20th revised edition, Contraceptive Technology Communications Inc., 2011