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Data updated: Nov 8, 2026

MARGENZA (margetuximab-cmkb) · TERSERA THERAPEUTICS LLC

HER2/Neu/cerbB2 Antagonists
Oncology Approved 2020-12-16

MARGENZA is a HER2/neu receptor antagonist indicated for use in combination with chemotherapy to treat adult patients with metastatic HER2-positive breast cancer. It is intended for patients who have already received two or more prior anti-HER2 regimens. At least one of these previous treatments must have been administered for metastatic disease.

Source: FDA Label • HER2/neu Receptor Antagonist

How MARGENZA Works

Margetuximab-cmkb binds to the extracellular domain of the HER2 protein, which inhibits tumor cell proliferation and reduces the shedding of the HER2 extracellular domain. The drug features a modified Fc region that increases binding to activating Fc receptors and decreases binding to inhibitory Fc receptors. These changes lead to enhanced antibody-dependent cellular cytotoxicity (ADCC) and natural killer (NK) cell activation against the tumor.

2
Indications
--
Phase 3 Trials
5
Years on Market

Details

Status
Prescription
First Approved
2020-12-16
Routes
INJECTION
Dosage Forms
INJECTABLE

Companies

Active Ingredient: MARGETUXIMAB-CMKB

MARGENZA Approval History

2021
2022
2023
2024
2025
2026
Original
New Indication
New Form
Label Update
3 FDA actions from 2020 to 2025 · 1 indication expansions
Jan 2025 SUPPL
Label · Labeling
May 2023 SUPPL
Efficacy
Dec 2020 ORIGINAL
New Drug · Type 1 - New Molecular Entity

What MARGENZA Treats

1 indications

MARGENZA is approved for 1 conditions since its original approval in 2020. These indications span multiple therapeutic areas including oncology, immunology, and more.

Source: FDA Label

MARGENZA Boxed Warning

LEFT VENTRICULAR DYSFUNCTION AND EMBRYO-FETAL TOXICITY WARNING: LEFT VENTRICULAR DYSFUNCTION AND EMBRYO-FETAL TOXICITY See full prescribing information for complete boxed warning. 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. ( 2.2 , 5.1 , 6.1 ) Embryo-Fetal Toxicity: Exp...

MARGENZA Competitive Set

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Filters applied: drops same-active-ingredient (505(b)(2) reformulations), route-mismatch (topical vs systemic), and cross-therapeutic-area matches in same-indication rings.

What's emerging in MARGENZA's indications

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Phase 3 candidates targeting molecules with no FDA-approved drug, in indications MARGENZA treats. First-in-class if their pivotal trials read out positive.

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Active Pipeline

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Key Completed Trials

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Trial Timeline

Full development history with FDA approval milestones

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Understanding FDA Approval Types
Count Type What it means
- ORIG Original approval - drug first enters market
- SUPPL - Efficacy New indication (new disease/condition approved)
- SUPPL - Labeling Label text changes (warnings, dosing updates)
- SUPPL - Manufacturing Production changes (new facility)
- SUPPL - Chemistry Formulation changes (new dosage strength)

Green lines in the timeline show ORIG and Efficacy approvals - the clinically meaningful milestones.

MARGENZA FDA Label Details

Indications & Usage

FDA Label (PDF)

MARGENZA is 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 [see Dosage and Administration and Clinical Studies ]. 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.

⚠️ BOXED WARNING

WARNING: LEFT VENTRICULAR DYSFUNCTION AND EMBRYO-FETAL TOXICITY WARNING: LEFT VENTRICULAR DYSFUNCTION AND EMBRYO-FETAL TOXICITY See full prescribing information for complete boxed warning. Left Ventricular Dysfunction: MARGENZA may lead to reductions in left ventricular ejection fraction (LVEF). Eva...

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Data Sources

Data sourced from official FDA and NIH databases. Click links to verify on original sources.