Illustration of MARGENZA antibodies targeting HER2-positive breast cancer cells

Re-engineer HER immune response

For your pretreated patients with HER2+ metastatic breast cancer (mBC)

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MARGENZA (margetuximab-cmkb) plus chemotherapy is indicated for the treatment of adult patients with HER2-positive mBC who have received two or more prior anti-HER2 regimens, at least one of which was for metastatic disease.

Mechanism of Action

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Head-to-Head Efficacy

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Fc=fragment crystallizable; HER2-positive=human epidermal growth factor receptor 2 positive; MOA=mechanism of action.

MAR-P-0366 (10/2025)

IMPORTANT SAFETY INFORMATION

BOXED WARNING: LEFT VENTRICULAR DYSFUNCTION AND EMBRYO-FETAL TOXICITY

Left Ventricular Dysfunction: MARGENZA may lead to reductions in left ventricular ejection fraction (LVEF). Evaluate cardiac function prior to and during treatment. Discontinue MARGENZA treatment for a confirmed clinically significant decrease in left ventricular function.
Embryo-Fetal Toxicity: Exposure to MARGENZA during pregnancy can cause embryo-fetal harm. Advise patients of the risk and need for effective contraception.

ADDITIONAL IMPORTANT SAFETY INFORMATION

Left Ventricular Dysfunction

Evaluate cardiac function within 4 weeks prior to and every 3 months during and upon completion of treatment.
In the pivotal SOPHIA study, left ventricular dysfunction occurred in 1.9% of patients treated with MARGENZA.
MARGENZA has not been studied in patients with a pretreatment LVEF value of <50%, a prior history of myocardial infarction, or unstable angina within 6 months, or congestive heart failure NYHA class II-IV.

Embryo-Fetal Toxicity

Based on findings in animals and mechanism of action, MARGENZA can cause fetal harm when administered to a pregnant woman.
Verify pregnancy status of women of reproductive potential prior to initiation of MARGENZA.

Infusion-Related Reactions (IRRs)

MARGENZA can cause IRRs. Monitor patients during and after MARGENZA infusion for signs and symptoms. If a significant infusion-associated reaction occurs, slow or interrupt the infusion and administer appropriate medical therapies.
In the pivotal SOPHIA study, IRRs were reported by 13% of patients on MARGENZA plus chemotherapy. Most of the IRRs occur during Cycle 1. Grade 3 IRRs were reported in 1.5% of MARGENZA-treated patients.
Interrupt MARGENZA infusion in patients experiencing dyspnea or clinically significant hypotension. Monitor patients until symptoms completely resolve.

MOST COMMON ADVERSE REACTIONS:

The most common adverse drug reactions (>10%) with MARGENZA in combination with chemotherapy in order of frequency are fatigue/asthenia, nausea, diarrhea, vomiting, constipation, headache, pyrexia, alopecia, abdominal pain, peripheral neuropathy, arthralgia/myalgia, cough, decreased appetite, dyspnea, infusion-related reactions, palmar-plantar erythrodysesthesia, and extremity pain.

To report SUSPECTED ADVERSE REACTIONS, contact the FDA at 1‑800‑FDA‑1088 or www.FDA.gov/medwatch. You may also contact TerSera Therapeutics at 1‑844‑334‑4035 or medicalinformation@tersera.com.

Please see accompanying Full Prescribing Information, including BOXED WARNING.

INDICATION

MARGENZA is a HER2/neu receptor antagonist indicated, in combination with chemotherapy, for the treatment of adult patients with metastatic HER2-positive breast cancer who have received two or more prior anti-HER2 regimens, at least one of which was for metastatic disease.

Please see accompanying Full Prescribing Information, including BOXED WARNING.

IMPORTANT SAFETY INFORMATION

BOXED WARNING: LEFT VENTRICULAR DYSFUNCTION AND EMBRYO-FETAL TOXICITY

Left Ventricular Dysfunction: MARGENZA may lead to reductions in left ventricular ejection fraction (LVEF). Evaluate cardiac function prior to and during treatment. Discontinue MARGENZA treatment for a confirmed clinically significant decrease in left ventricular function.
Embryo-Fetal Toxicity: Exposure to MARGENZA during pregnancy can cause embryo-fetal harm. Advise patients of the risk and need for effective contraception.

ADDITIONAL IMPORTANT SAFETY INFORMATION

Left Ventricular Dysfunction

Evaluate cardiac function within 4 weeks prior to and every 3 months during and upon completion of treatment.
In the pivotal SOPHIA study, left ventricular dysfunction occurred in 1.9% of patients treated with MARGENZA.
MARGENZA has not been studied in patients with a pretreatment LVEF value of <50%, a prior history of myocardial infarction, or unstable angina within 6 months, or congestive heart failure NYHA class II-IV.

Embryo-Fetal Toxicity

Based on findings in animals and mechanism of action, MARGENZA can cause fetal harm when administered to a pregnant woman.
Verify pregnancy status of women of reproductive potential prior to initiation of MARGENZA.

Infusion-Related Reactions (IRRs)

MARGENZA can cause IRRs. Monitor patients during and after MARGENZA infusion for signs and symptoms. If a significant infusion-associated reaction occurs, slow or interrupt the infusion and administer appropriate medical therapies.
In the pivotal SOPHIA study, IRRs were reported by 13% of patients on MARGENZA plus chemotherapy. Most of the IRRs occur during Cycle 1. Grade 3 IRRs were reported in 1.5% of MARGENZA-treated patients.
Interrupt MARGENZA infusion in patients experiencing dyspnea or clinically significant hypotension. Monitor patients until symptoms completely resolve.

MOST COMMON ADVERSE REACTIONS:

Please see accompanying Full Prescribing Information, including BOXED WARNING.

INDICATION

Please see accompanying Full Prescribing Information, including BOXED WARNING.

Re-engineer HER immune response

Mechanism of Action

Head-to-Head Efficacy

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