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benzinga Corporate Catalyst Impact 95/100 ● negative

Tenax Therapeutics Stock Dives as It Faces Heart Drug Study Setback

Aug 10, 2026, 4:02 PM UTC · Primary ticker $TENX

Tenax Therapeutics announced that its Phase 3 LEVEL study for oral levosimendan (TNX-103) in PH-HFpEF patients missed its primary and key secondary endpoints. This significant clinical trial failure has led to a massive sell-off in the company's stock, despite plans to discuss subgroup findings with the FDA.

Tenax Therapeutics reported disappointing topline results from its Phase 3 LEVEL study for TNX-103, failing to meet its primary endpoint for exercise capacity improvement and a key secondary symptom score. This is a critical setback for the company, as the success of this drug candidate was likely a major driver of its valuation. The stock plummeted nearly 90% on the news, indicating a severe loss of investor confidence. While the company plans to engage with the FDA based on 'encouraging subgroup findings,' the immediate short-term implication is highly negative, and the long-term outlook for TNX-103 is now uncertain, posing a significant risk for current shareholders.

$TENX negative Phase 3 trial failure
Source: benzinga
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