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Data updated: Mar 10, 2026

RAXIBACUMAB

RAXIBACUMAB Anthrax Protective Antigen-directed Antibody Interactions
Infectious Disease Approved 2012-12-14

Raxibacumab is an anthrax protective antigen-directed antibody indicated for the treatment of inhalational anthrax due to Bacillus anthracis in adult and pediatric patients. It is administered in combination with appropriate antibacterial drugs and may also be used for prophylaxis when alternative therapies are not available or appropriate. Because human clinical trials involving intentional exposure to anthrax are unethical, the drug's effectiveness was established using animal models. The medication does not cross the blood-brain barrier and is not indicated for the treatment or prevention of meningitis.

Source: FDA Label • HUMAN GENOME SCIENCES INC. • Anthrax Protective Antigen-directed Antibody

How RAXIBACUMAB Works

Raxibacumab is a monoclonal antibody that specifically binds to the protective antigen (PA) of Bacillus anthracis. By targeting this antigen, the drug neutralizes the toxins produced by the bacteria to prevent their harmful effects. Raxibacumab does not have direct antibacterial activity and must be used in conjunction with antibacterial drugs to address the underlying infection.

Source: FDA Label
2
Indications
--
Phase 3 Trials
2
Priority Reviews
13
Years on Market

Details

Status
Prescription
First Approved
2012-12-14
Routes
IV (INFUSION)
Dosage Forms
INJECTABLE

Companies

Active Ingredient: RAXIBACUMAB

RAXIBACUMAB Approval History

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What RAXIBACUMAB Treats

1 indications

RAXIBACUMAB is approved for 1 conditions since its original approval in 2012. These indications span multiple therapeutic areas including oncology, immunology, and more.

  • Inhalational Anthrax
Source: FDA Label

RAXIBACUMAB Boxed Warning

HYPERSENSITIVITY and ANAPHYLAXIS Hypersensitivity reactions, including anaphylaxis, have been reported during or after the administration of raxibacumab by intravenous infusion [see Warnings and Precautions ( 5.1 )] . Administer raxibacumab by intravenous infusion in monitored settings where appropriate equipment, medication (including epinephrine) and personnel trained in the management of hypersensitivity, anaphylaxis, and shock are available [see Warnings and Precautions ( 2.3 , 5.1 )] . WARN...

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Trial Timeline

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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.

RAXIBACUMAB FDA Label Details

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Indications & Usage

FDA Label (PDF)

Raxibacumab is indicated for the treatment of adult and pediatric patients with inhalational anthrax due to Bacillus anthracis in combination with appropriate antibacterial drugs, and for prophylaxis of inhalational anthrax when alternative therapies are not available or are not appropriate. Limitations of Use: The effectiveness of raxibacumab is based solely on efficacy studies in animal models of inhalational anthrax. There have been no studies of raxibacumab in the pediatric population. Dosing in pediatric patients was derived using an extrapolation approach. Raxibacumab does not cross the ...

⚠️ BOXED WARNING

WARNING: HYPERSENSITIVITY and ANAPHYLAXIS Hypersensitivity reactions, including anaphylaxis, have been reported during or after the administration of raxibacumab by intravenous infusion [see Warnings and Precautions ( 5.1 )] . Administer raxibacumab by intravenous infusion in monitored settings wher...

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Data Sources

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