Tradipitant: First Approval.

Tradipitant (NEREUS™) is a small molecule neurokinin-1 (NK-1) receptor antagonist being developed by Vanda Pharmaceuticals. NK-1 receptor activation and substance P release in the central nervous system leads to nausea and vomiting symptoms associated with motion sickness. Tradipitant received its first approval in the USA in December 2025 for the prevention of vomiting induced by motion in adults, and is also being developed for the treatment of gastroparesis and prevention of vomiting induced by GLP-1 receptor agonists. In phase III trials, tradipitant reduced the incidence of vomiting associated with motion sickness. This article summarizes the milestones in the development of tradipitant leading to this first approval for the prevention of vomiting induced by motion in adults.