Gwyn Lo is a combined hormonal contraceptive patch containing norelgestromin and ethinyl estradiol.

What are the strengths of Gwyn Lo?

Gwyn Lo delivers 220 mcg of norelgestromin and 20 mcg of ethinyl estradiol per day.

How often is the Gwyn Lo patch applied?

Gwyn Lo is applied once a week as part of a 28-day regimen consisting of three consecutive weeks of patch use followed by one patch-free week.

What are the approved application sites for Gwyn Lo?

Approved application sites for Gwyn Lo include the upper back, upper arm, lower abdomen, and buttock. Patients should inspect the patch daily and after water exposure to confirm that all edges remain securely adhered.

How long is the Gwyn Lo patch worn?

Each Gwyn Lo patch is designed to be worn for 7 days before being replaced as part of the 28-day regimen.

What is the Gwyn Lo dosing schedule?

The Gwyn Lo regimen consists of three weekly patches followed by one patch-free week.

Is Gwyn Lo designed to stay on during use?

Yes. Gwyn Lo is designed to provide consistent delivery during 7 days of wear. Patients should check the patch every day and after water exposure to make sure the edges remain securely adhered.

What should healthcare professionals know about Gwyn Lo adhesion?

Gwyn Lo is designed to stay on during use, including following water exposure. Patients should check the patch daily and after water exposure to confirm that the edges remain securely adhered.

A low-estrogen patch made
for 7-day wear

Q: Does Gwyn Lo provide consistent delivery over the full 7 days?

Gwyn Lo is designed to provide consistent delivery over 7 days of wear.

Gwyn Lo delivers low estrogen in a once-weekly, highly adhesive transdermal patch¹

220 mcg daily norelgestromin dose. 20 mcg daily ethinyl estradiol dose. Effective drug delivery depends on secure adhesion

Intentionally made with a low-
estrogen dose

A birth control patch worn on the stomach

Proven adhesion in a low-profile
design

~99% of the 39,790 patches worn in the year-long phase 3 study
remained attached.¹

1.3% of patches fully detached over the 7-day wear period¹

Evaluated in real-world activities

94% of 342 patches worn in 4 additional studies had ≥75% surface area adhesion when evaluated throughout the 7-day wear period across various application sites and conditions.¹

Treadmill

Sauna

Hot tub

Women should check their patch daily and after any water exposure (such as bathing or showering) to make sure all edges are sticking correctly.¹

Once-weekly application

3 weeks on. 1 week off.¹

Gwyn Lo follows a 28‑day regimen¹:

Four application sites¹

No notable differences in subject-related patch adhesion score were found based on
application sites.¹

Patients should apply each patch once a week on the same day of the week, rotating the exact
application site.* Only 1 patch should be worn at a time.¹

*Patients may use the same body region each week but should rotate the exact application site.¹
Please see the Instructions for Use for more dosing and administration information.