Gwyn Lo is a prescription birth control patch for women who can become pregnant and want a once-weekly option.

What does a Gwyn Lo cycle look like?

Use one patch each week for three weeks, then take one patch-free week.

Do I need to take a pill every day with Gwyn Lo?

No. Gwyn Lo is designed to give you birth control without a daily pill.

Does Gwyn Lo need to be inserted?

No. Gwyn Lo is a wearable patch, so it does not need to be inserted.

What hormones are in Gwyn Lo?

Gwyn Lo contains norelgestromin and ethinyl estradiol.

Who should not use Gwyn Lo?

Gwyn Lo should not be used by women who smoke and are over 35 years old, or by women with a BMI of 30 kg/m² or more. It is also not appropriate for women with a history of blood clots, stroke, heart attack, certain heart or heart-rhythm problems, some migraine headaches, liver disease, unexplained vaginal bleeding, or certain cancers.

What should I do while using Gwyn Lo?

Check your patch every day and after water exposure to make sure the edges are still sticking properly.

Where can I learn more about Gwyn Lo?

You can learn more from the Patient Info, Prescribing Info, and Instructions for Use sections on the site, and by talking with your doctor.

A hand holding the Gwyn Lo birth control patch

This is Gwyn Lo.

A new wearable birth control. Dropping soon.

Get ready to ask your doctor if Gwyn Lo is right for you. We'll let you know when it's available.

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Gwyn Lo is a birth control patch for women with a BMI less than 30 kg/m² who can become pregnant. It contains two female hormones, a progestin called norelgestromin, and an estrogen called ethinyl estradiol.

BMI=body mass index.

No medical procedure.
No insertion.
No daily dose.

One patch. All week.

You check it once daily and change it once weekly. After every 3 weeks, you have a patch‑free week. There's more to know: See the Instructions for Use and ask your doctor if you have any questions.

Check your patch every day and after any water exposure (such as bathing or showering) to make sure all edges are sticking correctly.