Today PTC Therapeutics released an updated letter to the Duchenne community on their website with additional details following the company’s withdrawal of the ataluren New Drug Application (NDA). This update includes new information on a limited supply of therapy, which PTC anticipates to last up to approximately six months for those currently receiving treatment, as well as a dedicated email address for physicians with questions.

Based on interactions with the U.S. Food and Drug Administration (FDA), PTC announced in February 2026 that the company has formally withdrawn its resubmission of its NDA for ataluren and that the FDA accepted the withdrawal. As a result, ataluren is no longer under active review for approval to market a new drug product in the United States.

We recognize how difficult this moment is, and that this update  brings additional uncertainty and frustration for many in our community. Please know that PPMD is here for you. If you need support, have questions, or want to talk, we encourage you to reach out to our care team directly: careteam@parentprojectmd.org or schedule a one-on-one meeting through our PPMD For You program.

We will continue to share updates with the community as information becomes available. According to PTC, if your physician has questions, they can contact PTCActs@ptcbio.com.

Upcoming Webinar

Please join PPMD for a webinar on Wednesday, April 8 at 1:30 PM ET to help the community better understand the regulatory context of recent developments with PTC Therapeutics’ withdrawal of the ataluren New Drug Application (NDA) and what this may mean moving forward.

The webinar will feature PTC Therapeutics as well as regulatory perspective from Faegre Drinker. We will provide an overview of the regulatory landscape and PTC’s current position, and answer questions from the community. Register today and submit your questions in advance.