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Transdermal Patch (EVRA*)
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What is it?
- How does it work?
- How do I use it?
- Tips for wearing EVRA*
- How effective is it in preventing pregnancy?
- What are the advantages?
- What are the disadvantages?
What is it?
EVRA* (also know as "The Patch") is a birth control patch. It is a 4cm x 4cm
thin, beige patch that you wear on your body. The patch sticks to a woman's skin
and continuously releases the hormones estrogen and progestin into the
bloodstream. Like birth control pills, EVRA* is highly effective in preventing
pregnancy when used correctly. Because the patch only needs to be replaced once a week, it
may be a good choice for women who have trouble remembering to take a pill every
day.
How does it work?
EVRA* contains 2 types of hormones: estrogen (ethinyl estradiol) and progestin (norelgestromin).
Once you apply the patch to your body, these hormones are continuously absorbed
through your skin and into your bloodstream. Like oral contraceptive pills, the
patch works to prevent pregnancy in 3 ways:
- Prevents the ovaries from releasing eggs
- Thickens the mucus secretions from your cervix, making it difficult for sperm to
enter your uterus
- Changes the lining of the uterus, making implantation difficult
How do I use it?
- One patch is applied to the skin each week, for 3 weeks in a row
- The patch should be changed on the same day each week (called the "Patch Change
Day")
- The fourth week is patch-free. (Your period is expected to begin during this
time.)
- Following the seven patch-free days, start a new cycle by applying a new patch
on the Patch Change Day. (The patch should never be off for more than 7 days in
a row.)
Tips for wearing EVRA*:
- The patch can be worn on the buttocks, stomach, back or upper arms, but not on
the breasts
- It may help to change the location of the patch each week to avoid skin
irritation
- Be sure to apply the patch to clean, dry skin and avoid having any creams or
oils on your hands
- When applying the patch, try to keep it flat with no bumps or wrinkles
- Check each day to make sure the patch is still well applied to the skin
How effective is it in preventing pregnancy?
The patch is more than 99% effective in preventing pregnancy when used
perfectly. However, it may be less effective in women who weigh more than 90 kg
(198 lbs).
What are the advantages?
- It is a reversible and highly effective birth control method
- Once-a-week regimen; no daily contraceptive routine required
- Simple and easy to use
- Regulates menstrual cycle and reduces cramps
- Does not interfere with sex
- Like the birth control pill, it is believed to reduce the risk of endometrial
and ovarian cancers and help prevent benign ovarian cysts
What are the disadvantages?
- The patch does not protect against
sexually transmitted infections
- May cause side effects, including irregular bleeding and spotting, breast
tenderness, headache or nausea
- May cause skin irritation in some people
- Patch may fall off (less than 2%)
- Need a prescription
- Women who cannot take estrogen due to a medical condition cannot use the patch
or the pill
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