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Data updated: Mar 10, 2026

KESIMPTA

OFATUMUMAB CD20-directed Antibody Interactions
Neurology Approved 2009-10-26

Kesimpta (ofatumumab) is a CD20-directed cytolytic antibody indicated for the treatment of relapsing forms of multiple sclerosis (MS) in adults. The therapy is approved for use in patients with clinically isolated syndrome, relapsing-remitting disease, and active secondary progressive disease. It serves as a targeted therapeutic option for adult patients managing these specific classifications of relapsing MS.

Source: FDA Label • Novartis • CD20-directed Cytolytic Antibody

How KESIMPTA Works

Ofatumumab binds to CD20, a cell surface antigen found on pre-B and mature B lymphocytes. While the precise therapeutic mechanism in multiple sclerosis is unknown, the drug is presumed to exert its effects by binding to these specific B cells. This binding results in antibody-dependent cellular cytolysis and complement-mediated lysis, leading to the destruction of the targeted lymphocytes.

Source: FDA Label
5
Indications
--
Phase 3 Trials
5
Priority Reviews
16
Years on Market

Details

Status
Prescription
First Approved
2009-10-26
Routes
SUBCUTANEOUS
Dosage Forms
SOLUTION

Companies

Active Ingredient: OFATUMUMAB

KESIMPTA Approval History

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What KESIMPTA Treats

3 indications

KESIMPTA is approved for 3 conditions since its original approval in 2009. These indications span multiple therapeutic areas including oncology, immunology, and more.

  • Clinically isolated syndrome
  • Relapsing-remitting multiple sclerosis
  • Active secondary progressive multiple sclerosis
Source: FDA Label

KESIMPTA Target & Pathway

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Target

CD20 (B-Lymphocyte Antigen CD20) Cell Surface Marker

A protein found on the surface of B-cells but not stem cells or plasma cells. Anti-CD20 antibodies deplete B-cells, making them effective in B-cell cancers and autoimmune diseases where B-cells drive pathology.

KESIMPTA Competitors

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10 other drugs also target CD20. Compare mechanisms, indications, and trial activity.

View all 10 CD20 drugs →
Drug = Competitor name Company = Manufacturer N indic. = FDA-approved indications → Date = Patent/exclusivity expiry

Competitors share the same molecular target (CD20). Earlier expiry dates signal biosimilar/generic opportunities.

Drugs Similar to KESIMPTA

FDA-approved drugs for similar conditions. Compare mechanisms and indications to understand treatment alternatives.

BRIUMVI
UBLITUXIMAB-XIIY
3 shared
TG THERAPEUTICS, INC
Shared indications:
Clinically isolated syndromeRelapsing-remitting multiple sclerosisActive secondary progressive multiple sclerosis
GILENYA
FINGOLIMOD HYDROCHLORIDE
3 shared
Novartis
Shared indications:
Clinically isolated syndromeRelapsing-remitting multiple sclerosisActive secondary progressive multiple sclerosis
PONVORY
PONESIMOD
3 shared
VANDA PHARMS INC
Shared indications:
Clinically isolated syndromeRelapsing-remitting multiple sclerosisActive secondary progressive multiple sclerosis
TECFIDERA
DIMETHYL FUMARATE
3 shared
Biogen
Shared indications:
Clinically isolated syndromeRelapsing-remitting multiple sclerosisActive secondary progressive multiple sclerosis
VUMERITY
DIROXIMEL FUMARATE
3 shared
Biogen
Shared indications:
Clinically isolated syndromeRelapsing-remitting multiple sclerosisActive secondary progressive multiple sclerosis
DIROXIMEL FUMARATE
DIROXIMEL FUMARATE
2 shared
ZYDUS
Shared indications:
Clinically Isolated SyndromeRelapsing-Remitting Multiple Sclerosis
AUBAGIO
TERIFLUNOMIDE
1 shared
Sanofi
Shared indications:
Clinically isolated syndrome
GLATIRAMER ACETATE
GLATIRAMER ACETATE
1 shared
CHEMI SPA
Shared indications:
Clinically Isolated Syndrome
MAYZENT
SIPONIMOD
1 shared
Novartis
Shared indications:
Clinically isolated syndrome
PLEGRIDY
PEGINTERFERON BETA-1A
1 shared
Biogen
Shared indications:
Clinically Isolated Syndrome
TASCENSO ODT
FINGOLIMOD LAURYL SULFATE
1 shared
CYCLE
Shared indications:
Clinically Isolated Syndrome
TERIFLUNOMIDE
TERIFLUNOMIDE
1 shared
MSN
Shared indications:
Clinically Isolated Syndrome
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Active Pipeline

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Ongoing clinical trials by development phase

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Key Completed Trials

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Completed studies with published results, ranked by significance

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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.

KESIMPTA FDA Label Details

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Indications & Usage

FDA Label (PDF)

KESIMPTA is indicated for the treatment of relapsing forms of multiple sclerosis (MS), to include clinically isolated syndrome, relapsing-remitting disease, and active secondary progressive disease, in adults. KESIMPTA is a CD20-directed cytolytic antibody indicated for the treatment of relapsing forms of multiple sclerosis (MS), to include clinically isolated syndrome, relapsing-remitting disease, and active secondary progressive disease, in adults.

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Data Sources

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