The Law Offices of Frank R. Cruz Announces Investigation of Zosano Pharma Corporation (ZSAN) on Behalf of Investors

·2-min read

The Law Offices of Frank R. Cruz announces an investigation of Zosano Pharma Corporation ("Zosano" or the "Company") (NASDAQ: ZSAN) on behalf of investors concerning the Company’s possible violations of federal securities laws.

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On September 30, 2020, the Company revealed that it received "a discipline review letter (DRL) from the U.S. Food and Drug Administration (FDA) in connection with the Qtrypta™ (zolmitriptan transdermal microneedle system) 505(b)(2) New Drug Application (NDA)." According to Zosano’s press release, the FDA "raised questions regarding unexpected high plasma concentrations of zolmitriptan observed in five study subjects from two pharmacokinetic studies and how the data from these subjects affect the overall clinical pharmacology section of the application." The FDA also "raised questions regarding differences in zolmitriptan exposures observed between subjects receiving different lots of Qtrypta in the company’s clinical trials."

On this news, the Company’s stock price fell $0.92 per share, or 57%, to close at $0.70 per share on October 1, 2020.

On October 21, 2020, the Company disclosed receipt of a Complete Response Letter ("CRL") from the FDA. As a result of the inconsistencies identified in the DRL, the FDA recommended that the Zosano conduct a repeat bioequivalence study between three of the lots used during development.

On this news, Zosano’s stock price fell $0.17 per share, or 27%, to close at $0.4441 per share on October 21, 2020. Follow us for updates on Twitter:

If you purchased Zosano securities, have information or would like to learn more about these claims, or have any questions concerning this announcement or your rights or interests with respect to these matters, please contact Frank R. Cruz, of The Law Offices of Frank R. Cruz, 1999 Avenue of the Stars, Suite 1100, Los Angeles, California 90067 at 310-914-5007, by email to, or visit our website at If you inquire by email please include your mailing address, telephone number, and number of shares purchased.

This press release may be considered Attorney Advertising in some jurisdictions under the applicable law and ethical rules.

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The Law Offices of Frank R. Cruz, Los Angeles
Frank R. Cruz, 310-914-5007