NK-1 Drug Fills Motion Sickness Gap
Tradipitant demonstrates 50% to 70% risk reduction for vomiting incidence during motion exposure in phase 3 trials.
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By
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Kerri Miller
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January 2, 2026
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The FDA approved NEREUS (tradipitant) for preventing motion-induced vomiting in adults, marking the first new treatment in over 40 years.
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Tradipitant significantly reduced vomiting incidence in phase 3 studies, with rates of 18%-20% versus 44% for placebo in Motion Syros.
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The drug acts as a neurokinin-1 receptor antagonist, targeting the substance P pathway involved in motion-induced nausea.
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Common adverse reactions include somnolence and fatigue, with warnings about impaired abilities for driving or operating machinery.
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Vanda Pharmaceuticals is developing tradipitant for additional indications, including gastroparesis and nausea from diabetes treatments.