Trastuzumab and Hyaluronidase-oysk
Herceptin Hylecta is a prescription medication combining trastuzumab with hyaluronidase, designed as a subcutaneous injection for treating HER2-positive breast cancer. It delivers the same active ingredient as intravenous Herceptin but allows for under-the-skin administration, which can be completed in minutes rather than requiring lengthy IV infusions.
Herceptin Hylecta is a subcutaneous injection treatment for HER2-positive breast cancer that offers a faster administration option compared to traditional IV infusion.
Key facts at a glance
- RxNorm
- 2119715
- Generic
- Herceptin Hylecta
- Class
- brand-name
- Brands
- —
- Availability
- rx
- Lactation
- unknown
- Routes
- —
- Forms
- —
- Regions
- US, EU, CN, JP
- Monitoring
- —
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Herceptin Hylecta is indicated for the treatment of adults with HER2-positive breast cancer, including both early and metastatic disease. It may be used alone or in combination with chemotherapy depending on the specific treatment regimen determined by the prescribing physician.
The medication contains trastuzumab, a monoclonal antibody that specifically binds to the HER2 protein on cancer cells. By targeting HER2, it inhibits the signals that promote cancer cell growth and survival, and may also signal the immune system to help destroy cancer cells.
Herceptin Hylecta is administered as a subcutaneous injection under the skin. As with other trastuzumab products, it can cause serious heart side effects including heart failure. Treatment should be initiated and supervised by a healthcare provider experienced in cancer treatment. Patients should be monitored for infusion-related reactions and cardiac function during treatment.
Official drug label
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed July 26, 2026. · Read our editorial policy