Medical Professionals / Clinical Trial Information / Clinical Trial FAQ Library

Clinical Trial FAQ Library

Find answers to commonly asked questions regarding clinical trials, expanded access programs, or compassionate use.


If you are unable to find the answers you need, please contact our Clinical Trial Information Support team at (888) 662-6728, Monday-Friday, 5am-5pm PT.

Helpful Resources

  • Clinical Trial Support Information

    Phone: (888) 662-6728
    Chat with a nurse: Click here to chat
    Hours: Monday - Friday, 5am - 5pm PT

  • Compassionate Use Information

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

  • How the FDA Views Access

    FDA position on access to investigational drugs outside of a clinical trial (Expanded Access).

  • Report a side effect

    You may report side effects to the FDA at (800) FDA-1088 or www.fda.gov/medwatch.

    You may also report side effects to Genentech at (888) 835-2555.

  • Medical Communications

    Medical information about Genentech products.
    Phone: (800) 821-8590
    Chat with a nurse: Click here to chat
    Hours: Monday - Friday, 5am - 5pm PT

  • About Clinical Trials

    Information from the National Cancer Institute about clinical trials.

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