TheraRadar
Data updated: May 26, 2026

RAXIBACUMAB

Anthrax Protective Antigen-directed Antibody Interactions Trial Activity: Declining
Infectious Disease Approved 2012-12-14

RAXIBACUMAB is indicated for the treatment of Inhalational Anthrax.

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.

Development Insights

Human Genome Sciences Inc. conducting 3 trials (75%)
3 indications explored (Focused)
healthy (2 trials)
infections, bacterial (1 trials)
therapeutic treatment of inhalation anthrax (1 trials)
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

2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
Original
New Indication
New Form
Label Update
3 FDA actions from 2012 to 2021 · 1 indication expansions
Jun 2021 SUPPL
Label · Labeling
Jan 2018 SUPPL Priority
Efficacy
Dec 2012 ORIGINAL Priority
New Drug · Type 1 - New Molecular Entity

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...

RAXIBACUMAB Competitive Set

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Three rings of competition based on shared molecular targets and treated indications.

Indication competitors

2

Same indication, different mechanism — what else might this patient receive?

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

Drugs Similar to RAXIBACUMAB

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

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OBILTOXAXIMAB
1 shared
ELUSYS THERAPEUTICS INC
Shared indications:
Inhalational Anthrax
CIPROFLOXACIN HYDROCHLORIDE
CIPROFLOXACIN HYDROCHLORIDE
1 shared
AMRING PHARMS
Shared indications:
Inhalational Anthrax
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Clinical Trial Registry

3 trials
Trial Sponsor ID Phase Status Title
NCT02339155 results posted 201436 Ph 4 completed Effect of Raxibacumab on Immunogenicity of Anthrax Vaccine Adsorbed
NCT02016963 results posted HGS1021-C1069 Ph 2, Ph 3 completed An Open-label, Nonrandomized Study to Evaluate the Safety and Immunogenicity of Raxibacumab With Reinjection
NCT00639678 results posted HGS1021-C1063 Ph 3 completed A Study to Evaluate the Safety and Tolerability of Raxibacumab in Healthy Subjects
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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.

RAXIBACUMAB FDA Label Details

Indications & Usage

FDA Label (PDF)

RAXIBACUMAB is indicated for the treatment of Inhalational Anthrax.

⚠️ 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.

How We Calculate These Metrics

Trial Activity Stage

Measures the current development activity pattern based on trial phases, status, and trends. Important: This measures R&D activity, not commercial lifecycle.

Trial statuses: "Active" means recruiting or ongoing. "Completed" means reached planned endpoint. "Terminated" means stopped early—often due to safety, efficacy, or business reasons.

  • Growth: High proportion of early-phase trials (Phase 1/2), active development
  • Expansion: Significant Phase 3 activity, approaching or pursuing approvals
  • Mature: Substantial Phase 4 post-marketing studies
  • Stable: Mixed phase distribution, steady development
  • Declining: Low active trial ratio, reduced R&D investment