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Contact Us

Contact Us

Our South San Francisco campus, the birthplace of biotechnology.

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For Questions About Our Medicines

  • Report an Adverse Event

    Phone: (888) 835-2555
    Hours: 24 hrs/day, 7 days/week

    Mail: Genentech US Drug Safety
    1 DNA Way Mailstop 258A
    South San Francisco, CA 94080

    Fax: (650) 225-4630

  • Report a Product Complaint

    Phone: (800) 334-0290
    Hours: Monday - Friday, 5am - 5pm PT

  • Medical Communications

    Phone: (800) 821-8590
    Hours: Monday - Friday, 5am - 5pm PT

  • Clinical Trial Information

    Phone: (888) 662-6728
    Hours: Monday - Friday, 5am - 5pm PT

  • Compassionate Use Information

    Phone: (844) 287-3783 (CU-REQUEST)
    Hours: Monday - Friday, 5am - 5pm PT

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The way to do research is to attack the facts at the point of greatest astonishment.
” – Celia Green
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