FDA Approves Genentech’s Phesgo for Breast Cancer

Share

FDA has approved Genentech’s Phesgo (pertuzumab, trastuzumab, and hyaluronidase ZZXF) for injection under the skin to treat adult patients with metastatic HER2-positive breast cancer, and for treating adult patients with early HER2-positive breast cancer. An agency announcement says patients should be selected based on an FDA-approved companion diagnostic test.

The announcement says the therapeutic components in Phesgo are the same as those in FDA-approved IV pertuzumab and IV trastuzumab. Phesgo offers patients the opportunity to be treated as an outpatient at home rather than at an infusion center, the agency says.

Approval was based on the results of a non-inferiority study in patients with HER2-positive early breast cancer, which FDA says demonstrated Phesgo had comparable efficacy and safety as the IV formulations, except for administration-related reactions, which were higher with Phesgo due to the subcutaneous administration route.

Phesgo labeling includes a Boxed Warning about the risk of potential heart failure, fetal harm, and lung toxicity. The most common side effects were listed as alopecia, nausea, diarrhea, anemia, and asthenia.

Read more