Tetraphase Pharmaceuticals announces failed primary endpoint in IGNITE2 clinical trial

Tetraphase Pharmaceuticals, Inc. announced Tuesday that the IGNITE2 phase 3 clinical trial of eravacycline administered as an IV to oral transition therapy for the treatment of complicated urinary tract infections failed to meet its primary endpoint of statistical non-inferiority compared to levofloxacin.

"We are disappointed that the IGNITE2 trial did not achieve its primary endpoint. We plan to further analyze the data and provide an update after we have discussed the data and our plans for a path forward with the regulatory agencies," Guy Macdonald, president and CEO of Tetraphase, said. "We previously announced positive data from the IGNITE1 phase 3 clinical trial of eravacycline administered intravenously in complicated intra-abdominal infections which did meet its primary endpoint, demonstrating high cure rates in prevalent Gram-negative pathogens and a favorable safety profile."

The pivotal portion of the phase 3 IGNITE2 clinical trial enrolled 908 patients who were randomized 1:1 to receive eravacycline or levofloxacin. Each patient received a minimum of three days of IV dosing and then, if clinically indicated, were eligible to transition to oral therapy for the remaining doses for a total treatment period of seven days.

"We continue to believe that eravacycline can benefit patients with serious infections, particularly those caused by difficult-to-treat Gram-negative bacteria," Macdonald said.

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Tetraphase Pharmaceuticals, Inc. 480 Arsenal St Watertown, MA 02472