Incannex Healthcare Stock Soars 15% After FDA Fast Tracks Obstructive Sleep Apnea Drug

Incannex’s Fast Track designation for IHL-42X follows strong Phase 2 data and grants the program expanded FDA access and review advantages.

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In this photo illustration, Incannex Healthcare Inc. logo is seen on a smartphone and in the background. (Photo Illustration by Pavlo Gonchar/SOPA Images/LightRocket via Getty Images)

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Deepti Sri · Stocktwits

Published Dec 3, 2025, 5:16 PM

IXHL
  • FDA Fast Track status followed strong Phase 2 efficacy and safety results for IHL-42X.
  • The designation provides benefits including a rolling review and closer FDA engagement.
  • Stocktwits users highlighted the scale of OSA unmet need and long-term optimism.

Incannex Healthcare shares rose nearly 15% on Wednesday after the company said the U.S. Food and Drug Administration (FDA) granted Fast Track designation to IHL-42X, its oral fixed-dose combination candidate for obstructive sleep apnea.

FDA Fast Track Status

Incannex said the designation was supported by results from three completed clinical trials, including its Phase 2 RePOSA study, which showed statistically significant reductions in Apnea-Hypopnea Index with individual reductions of up to 83%, along with favorable patient-reported outcomes and an “excellent safety profile.”

The company said the Fast Track status allows more frequent interactions with the FDA, eligibility for rolling review of a future New Drug Application, and potential access to Accelerated Approval and Priority Review if criteria are met.

Incannex said it expects detailed written feedback from the FDA on its Phase 2 data package and development strategy and will provide updates once it has reviewed the agency’s guidance.

Generalized Anxiety Disorder Data Adds Momentum

In August, the company reported positive mid-stage trial results for PSX-001 in generalized anxiety disorder. The study showed statistically significant improvements across all key endpoints, including a strong reduction on the Hamilton Anxiety Rating Scale among 73 participants.

Stocktwits Traders Cheer Fast Track Status

On Stocktwits, retail sentiment for Incannex was ‘extremely bullish’ amid ‘high’ message volume.

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IXHL sentiment and message volume as of December 3| Source: Stocktwits

One user said, “this is incredible news. Fast tracked serves unmet medical needs, meaning this is the only pill in existence for a disease that affect nearly a billion people.”

Another bullish user called the stock a “long hold” and expects further positive developments.

Incannex Healthcare’s stock has declined 79% so far in 2025.

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