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Gwyn Lo is a birth control patch. It’s for women with a BMI less than 30 kg/m² who can become pregnant. With Gwyn Lo, there is no medical procedure, no insertion, and no daily pill—it goes on your skin. It's applied in a 4-week cycle: once a week on the same day for 3 weeks, followed by a patch-free week on week 4.*

Gwyn Lo contains 2 female hormones, a progestin called norelgestromin, and an estrogen called ethinyl estradiol. It is a low-estrogen birth control patch.

*Check your patch daily and after any water exposure to make sure all edges are sticking correctly (so it works right).
See the Instructions for Use and ask your doctor if you have any questions.
BMI=body mass index.

The pill is taken daily. Gwyn Lo is a birth control patch that you wear all week. You put it on once weekly, and check it once daily, so you don’t have to remember to take a pill every day.

You put it on the same day once weekly for 3 weeks, then week 4 is patch free. You check your patch once daily and after any water exposure to make sure all edges are sticking correctly (so it works right). Avoid contact with water for long periods of time (30 minutes or more).

Combined hormonal birth control, like the pill or patch, may also contain different types and amounts of female hormones. Your doctor will discuss and determine what is right for you.

See the Instructions for Use and ask your doctor if you have any questions.

Combined hormonal birth control helps prevent pregnancy by using 2 hormones: estrogen and progestin. Gwyn Lo works by delivering estrogen and progestin through your skin over the course of the week when used as directed.

You need to change the Gwyn Lo patch once a week. Each month, you’ll have 3 weeks with the Gwyn Lo patch on, and 1 patch-free week. Choose the same day each week to put on your patch (patch change day).

Check your patch daily and after any water exposure to make sure all edges are sticking correctly (so it works right). Avoid contact with water for long periods of time (30 minutes or more).

See the Instructions for Use and ask your doctor if you have any questions.

You can place the Gwyn Lo patch on your lower abdomen, upper arm, back, or butt.

Switch up the exact spot each week. Don't put your patch on the same place as your last one—but you can use the same body part.

Avoid sticking the patch on your breasts, cut or irritated skin, or areas where tight clothing may rub. 

See the Instructions for Use and ask your doctor if you have any questions.

If you forget to change your week 1 patch:

• Put it on as soon as you remember—that day of the week will be your new patch change day
• Use a nonhormonal backup birth control (like condoms) for the next 7 days

If you forget to change your week 2 or 3 patch:

• Put it on as soon as you remember
• If you put it on within 2 days of your usual patch day:

• Your next patch should be applied on your usual patch change day
• No backup birth control needed

• If you put it on 2 days or more after your usual patch day:

• Start a new 4-week cycle by putting on a new patch
• That day of the week will be your new patch change day
• Use a nonhormonal backup birth control (like condoms) for the next 7 days

• If you forget to remove the patch during week 4 (patch-free week):

• Take it off when you remember
• Start your next cycle on your normal patch change day
• No backup birth control is needed

See the Instructions for Use and ask your doctor if you have any questions.

Gwyn Lo must stick securely to your skin to work. It is designed to stay on all week, but you should check it daily and after any water exposure (like bathing or showering), to make sure all the edges are sticking correctly. Avoid contact with water for 30 minutes or longer as it can cause the patch to not stick, making Gwyn Lo less effective.

If your patch comes off before the week is over, here’s what to do:

• If the edge of the patch lifts up, try pressing it firmly with the palm of your hand for 10 seconds, so the whole patch sticks back on. Use your fingers to smooth out the edges
• If the patch has been off or partially off for less than 1 day, and does not fully stick when you try to press it, remove it and apply a new patch right away. No backup birth control is needed and your “patch change day” will stay the same
• If the patch has been off or partially off for more than 1 day or if you are not sure how long, start a new 4-week cycle by applying a new patch right away. This will be your new patch change day. Use a nonhormonal backup birth control (like condoms) for the next 7 days
• Do not tape or wrap the patch to your skin. If it's not sticky or sticks to itself or something else, don't try to reuse it

Only one patch should be worn at a time.

Try the Patch Replacement Program: If you find yourself in need of an additional patch because you needed to replace a patch, contact Viatris at 1-877-446-3679 (1-877-4-INFO-RX).

See the Instructions for Use and ask your doctor if you have any questions.

Make sure you remove your old Gwyn Lo patch during week 4 and do not apply a new patch. Your period should start during your patch-free week.

If you miss a period, you might be pregnant. Some women miss their periods or have light periods on hormonal birth control methods even when they are not pregnant. Call your healthcare provider if you miss 1 period and have not used your Gwyn Lo patch every day or you miss 2 periods in a row.

See the Instructions for Use and ask your doctor if you have any questions.

Yes. If you want to change your patch day, finish the first 3 weeks of your patch cycle. During your patch-free week, put on a new patch on your preferred day.

You should not go more than 7 days without a patch on, or you could become pregnant.

See the Instructions for Use and ask your doctor if you have any questions.

Gwyn Lo is designed to stay on the skin for 7 days. In a year-long study, ~99% of the 39,790 Gwyn Lo patches worn stayed on. That means 1.3% of patches fully detached over 7 days of wear. In 4 additional studies, 94% of the 342 Gwyn Lo patches worn had three quarters or more of the patch still attached after 7 days of wear during activity and water exposure (in a treadmill, sauna, and hot tub).

Check your patch daily and after any water exposure to make sure all edges are sticking correctly (so it works right). Avoid contact with water for 30 minutes or longer as it can cause the patch to not stick, making Gwyn Lo less effective.

Only if you want them to! You can easily hide it under clothes, or not.

The Gwyn Lo patch is:

• Small and subtle
• Slightly larger than a quarter. It's about 1.5 inches across
• Wearable in 4 areas: your lower abdomen, upper arm, back, and butt

Don't put your patch on the same place as your last one—but you can use the same body part. Avoid sticking the patch on your breasts, cut or irritated skin, or areas where tight clothing may rub.

Depending on whether you're starting Gwyn Lo as your first birth control or changing from another method, instructions may be different:

• Not on ​birth control​: Start on day* 1 of your period or the first Sunday after that
• Pill, another patch, ​ring, or shot​: Start on day* 1 of your​ next monthly cycle
• IUD or implant​: Start on the day* your IUD or implant is removed

Use nonhormonal backup birth control (like condoms) for 7 days if you start any other day besides day 1 of your monthly cycle.

See the Instructions for Use for more information.

*Day=within 24 hours.
IUD=intrauterine device.

Use Gwyn Lo as prescribed. If you want to become pregnant, you can stop using Gwyn Lo whenever you want. Consider a visit with your healthcare provider for a pre-pregnancy checkup before you stop using the patch. For more information about stopping Gwyn Lo, see the Instructions for Use.

Gwyn Lo was studied in 983 women who used it for about a year. In the study, 4 out of 100 women got pregnant within a year of using Gwyn Lo. That means 96% of women avoided pregnancy when using Gwyn Lo as directed.

If you start Gwyn Lo on day 1 of your period, you do not need to use nonhormonal backup birth control (like condoms).

If you start Gwyn Lo at any other time, use condoms or another nonhormonal backup for the first 7 days.

The safety of Gwyn Lo was studied in over 1200 women.

Serious side effects:

Gwyn Lo may cause serious side effects, including blood clots. Like pregnancy, hormonal birth control may increase the risk of serious blood clots, especially in women who have other risk factors such as smoking, high blood pressure, high levels of fat in the blood, diabetes, obesity, a family history of blood clots, or are older than 35 years old. This increased risk is highest when you first start using hormonal birth control and when you restart the same or different hormonal birth control after not using it for a month or more.
Some studies have reported that women who use norelgestromin and ethinyl estradiol transdermal system have a higher risk of getting a blood clot. Talk with your healthcare provider about your risk of getting a blood clot before using Gwyn Lo or deciding which type of birth control is right for you.

The most common side effects of Gwyn Lo include:

• Skin irritation, redness, itching, or rash at the patch application site
• Bleeding between periods and heavy periods
• Nausea

These are not all the possible side effects of Gwyn Lo. See the Patient Information for more. Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.

In a study of Gwyn Lo with over 1200 women, 0.9% stopped Gwyn Lo due to mental health conditions. Mental health conditions included depression, anxiety, suicidal ideation, altered mood, depressed mood, and irritability.

In a study of Gwyn Lo with over 1200 women, 0.2% of women stopped Gwyn Lo because of weight gain.

When you use Gwyn Lo, you may have bleeding and spotting between periods, called unplanned bleeding.

Unplanned bleeding may vary from slight staining between menstrual periods to breakthrough bleeding, which is a flow much like a regular period. Unplanned bleeding occurs most often during the first few months of Gwyn Lo use, but may also occur after you have been using the patch for some time. Such bleeding may be temporary and usually does not indicate any serious problems. It is important to continue using the patch on schedule. If the unplanned bleeding or spotting is heavy or lasts for more than a few days, you should discuss this with your healthcare provider.

Here are some steps to start and save with Gwyn Lo:

1. Talk to your doctor. Make an appointment with a doctor or local health clinic. Ask them about Gwyn Lo.
2. Get your prescription. Many birth control options are covered through the Affordable Care Act with no out-of-pocket cost. Check your insurance plan for more info.
3. Start your week. Pick up your patches. Start Gwyn Lo. Follow the Instructions for Use.

If you have commercial insurance with product coverage, you may pay as low as $0 for a 1-month or 3-month prescription with the Gwyn Lo Savings Program.

Not valid for Medicaid/Medicare. See the full Terms and Conditions.

You may be able to save with the Gwyn Lo Savings Program—whether you have commercial insurance or are paying cash.

• If you have commercial insurance with product coverage, you may pay as low as $0 for a 1-month or 3-month prescription with the Gwyn Lo Savings Card
• If you’re not covered by commercial insurance or are paying in cash, you may pay as low as $40 for a 1-month, or $65 for a 3-month prescription

Not valid for Medicaid/Medicare. See the full Terms and Conditions.