Complete Response Letter for Zosano’s Qtrypta

FDA has issued a complete response letter in connection with Zosano Pharma’s 505(b)(2) NDA for its Qtrypta (zolmitriptan transdermal microneedle system). The letter reportedly cites inconsistent zolmitriptan exposure levels observed across clinical pharmacology studies.

The company says the agency recommended that Zosano conduct a repeat bioequivalence study between three of the lots used during development.

Company executives say they are seeking a meeting with FDA officials to discuss strategies to address the letter’s comments and resubmit the NDA.

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