FDA, Vanda Agree on Dispute Actions

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FDA and Vanda Pharmaceuticals have agreed to a framework for resolving their ongoing disputes about the company’s sleep-wake cycle drug Hetlioz (tasimelteon) and its gastroparesis drug tradipitant. A Vanda statement lists these features of the agreement:

  • FDA will conduct an expedited re-review of the partial clinical hold preventing long-term clinical studies of tradipitant to treat motion sickness by 11/26 and will continue its review of the company’s NDA for this indication with the current PDUFA action date of 12/30;
  • FDA will conduct an expedited re-review of Vanda’s sNDA for Hetlioz to treat jet lag disorder by 1/7/2026, including the consideration of alternative or narrowed indications focusing on the sleep-related aspects of jet lag disorder;
  • FDA and Vanda will seek a temporary pause of the ongoing administrative proceedings before the FDA commissioner on Vanda’s NDA for tradipitant to treat gastroparesis until 1/7/2026;
  • FDA and Vanda have sought a pause in the company’s suit challenging FDA’s practice of taking up to 12 months, rather than the statutory 180 days, to decide NDAs;
  • Vanda will dismiss its suit challenging the FDA partial clinical hold preventing long-term studies of tradipitant to treat motion sickness; and
  • Vanda will dismiss its suit on its request to provide information to prescribers and patients about Hetlioz’ efficacy in jet lag disorder.

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