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Non-24-Hour Sleep-Wake Disorder (Non-24) is a serious circadian rhythm disorder. It can cause significant nighttime sleep problems and a wide range of daytime difficulties. This can include an overwhelming urge to sleep during the day. These symptoms can lead to a decrease in well-being and productivity.

Non-24 affects 70% of people who are totally blind. However, few people know about it. That's why it's important to learn about the symptoms of Non-24 and share the information with people you know.

When you sign up, you’ll stay up to date with the latest information. You will also receive helpful tools, learn about resources, and be invited to special educational events.

You can sign up using the form below. Or call us toll free at 1-855-856-2424. Once again, the number is 1-855-856-2424.

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I have been diagnosed with Non-24 I think I may have Non-24 I am a family member or friend of someone with vision loss/blindness I am a healthcare professional I am a professional for the blind and visually impaired

By clicking "Submit," I certify that I am at least 18 years old and that I am giving Vanda Pharmaceuticals, and companies acting on its behalf, permission to send me information about Non-24 and about medicines that treat Non-24, and that I have read the Privacy Policy and Terms of Use.

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