NRx Pharmaceuticals Files Breakthrough Therapy Designation Request for ZYESAMI

NRx Pharmaceuticals

RADNOR, PA — NRx Pharmaceuticals (Nasdaq: NRXP) announced that it recently filed a new Breakthrough Therapy Designation (BTD) request with the US Food and Drug Administration (FDA) focused on patients with Critical COVID-19 and respiratory failure who are at immediate risk of death despite treatment with remdesivir and other approved therapies.

NRx filed the request after the FDA’s request for clinical data on ZYESAMI® vs. Remdesivir in these high-risk patients. Prof. David Schoenfeld, one of the world’s most widely published statisticians with unique expertise in life-threatening diseases of the lung conducted the new analysis.

ZYESAMI® (aviptadil) has demonstrated a statistically significant two-fold increased odds of survival compared to placebo across all patients and hospitals studied in a randomized trial of 196 patients. However, in 70% of patients who were already treated with Remdesivir and continued to progress despite all approved therapies, ZYESAMI has demonstrated a highly significant four-fold increased odds of survival compared to placebo at 60 days (P=.006). Moreover, those treated with ZYESAMI after Remdesivir has failed demonstrate a 3-fold increased odds of being both alive and free of respiratory failure at both 28 and 60 days, compared to placebo (P=.03).

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The FDA recently declined Emergency Use Authorization (EUA) and Breakthrough Therapy Designation (BTD) for ZYESAMI and invited a new request based on new clinical evidence that aviptadil may demonstrate a significant improvement in treatment over existing therapies. Based on the FDA’s input, NRx has narrowed its BTD request to treatment of COVID-19 respiratory failure in patients who progress despite treatment with remdesivir and other approved therapies.

“At a time when America is entering a new COVID-related crisis, we thank the FDA for encouraging us to address the subset of patients who have no other approved treatment”, said Prof Jonathan Javitt, MD, MPH, Chairman and CEO of NRx Pharmaceuticals. “More than 2,000 Americans died from COVID-19 on Christmas eve. With the FDA’s support, we believe we have the chance to help more than 100,000 Americans return to their loved ones who otherwise might not live to see next year’s holidays.”

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