TheraRadar
Data updated: May 26, 2026

ANTHIM (obiltoxaximab)

Anthrax Protective Antigen-directed Antibody Interactions
Priority Review
Infectious Disease Approved 2016-03-18

ANTHIM is indicated for the treatment of Inhalational Anthrax.

Source: FDA Label • ELUSYS THERAPEUTICS INC • Anthrax Protective Antigen-directed Antibody

How ANTHIM Works

Obiltoxaximab is a monoclonal antibody that specifically binds to the protective antigen (PA) of Bacillus anthracis. By binding to this target, the drug neutralizes the biological activity of the anthrax toxin. It does not possess direct antibacterial activity and is intended for use alongside appropriate antibacterial medications to manage the infection.

1
Indication
--
Phase 3 Trials
10
Years on Market

Details

Status
Prescription
First Approved
2016-03-18
Patent Cliff
2023

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Routes
INJECTION
Dosage Forms
INJECTABLE

Companies

Active Ingredient: OBILTOXAXIMAB

ANTHIM Approval History

2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
Original
New Indication
New Form
Label Update
3 FDA actions from 2016 to 2019
Nov 2019 SUPPL
Label · Labeling
Oct 2016 SUPPL
Mfg · Manufacturing (CMC)
Mar 2016 ORIGINAL
New Drug · Type 1 - New Molecular Entity

What ANTHIM Treats

1 indications

ANTHIM is approved for 1 conditions since its original approval in 2016. These indications span multiple therapeutic areas including oncology, immunology, and more.

  • Inhalational Anthrax
Source: FDA Label

ANTHIM Boxed Warning

HYPERSENSITIVITY and ANAPHYLAXIS Hypersensitivity and anaphylaxis have been reported during the intravenous infusion of ANTHIM. Due to the risk of hypersensitivity and anaphylaxis, ANTHIM should be administered in monitored settings by personnel trained and equipped to manage anaphylaxis. Monitor individuals who receive ANTHIM closely for signs and symptoms of hypersensitivity reactions throughout the infusion and for a period of time after administration. Stop ANTHIM infusion immediately and tr...

ANTHIM 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.

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Active Pipeline

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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.

ANTHIM FDA Label Details

Indications & Usage

FDA Label (PDF)

ANTHIM is indicated for the treatment of Inhalational Anthrax.

⚠️ BOXED WARNING

WARNING: HYPERSENSITIVITY and ANAPHYLAXIS Hypersensitivity and anaphylaxis have been reported during the intravenous infusion of ANTHIM. Due to the risk of hypersensitivity and anaphylaxis, ANTHIM should be administered in monitored settings by personnel trained and equipped to manage anaphylaxis. M...

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Data Sources

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