Atnaa Recall

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Questions & Answers

Side Effects & Adverse Reactions

While ATNAA can be administered to all individuals with a life-threatening exposure to organophosphorous nerve agents, it should be administered with extreme caution to individuals with the following disorders when the symptoms of nerve agent poisoning are less severe: individuals who are hypersensitive to any component of the product, disorders of heart rhythm such as atrial flutter, severe narrow angle glaucoma, pyloric stenosis, or prostatic hypertrophy.

More than one dose of ATNAA, to a maximum of three doses, may be necessary, especially when exposure is massive or symptoms are severe (see DOSAGE AND ADMINISTRATION). Children are more susceptible than adults to the toxic effects of anticholinergic agents.

Severe difficulty in breathing requires artificial respiration in addition to the use of the ATNAA.

Pralidoxime is not effective in the treatment of poisoning due to phosphorus, inorganic phosphates, or organophosphates not having anticholinesterase activity.

Legal Issues

There is currently no legal information available for this drug.

FDA Safety Alerts

There are currently no FDA safety alerts available for this drug.

Manufacturer Warnings

There is currently no manufacturer warning information available for this drug.

FDA Labeling Changes

There are currently no FDA labeling changes available for this drug.


The ATNAA is indicated for the treatment of poisoning by susceptible organophosphorous nerve agents having anticholinesterase activity.


There is currently no drug history available for this drug.

Other Information

The Antidote Treatment - Nerve Agent, Auto-Injector (ATNAA) provides Atropine Injection and Pralidoxime Chloride Injection in separate chambers as sterile, pyrogen-free solutions for intramuscular injection.

The ATNAA is a specially designed unit for automatic self-or buddy-administration by military personnel. When activated, the ATNAA sequentially administers atropine and pralidoxime chloride through a single needle. The recommended procedure (see DOSAGE AND ADMINISTRATION) is to inject the contents of the auto-injector into the muscles of an outer thigh or into the buttocks.

When activated, each ATNAA dispenses:

2.1 mg atropine in 0.7 mL of a sterile, pyrogen-free solution containing 12.47 mg glycerin and not more than 2.8 mg phenol, citrate buffer, and Water for Injection. The pH range is 4.0 - 5.0.


600 mg of pralidoxime chloride in 2 mL of a sterile, pyrogen-free solution containing 40 mg benzyl alcohol, 22.5 mg glycine, and Water for Injection. The pH is adjusted with hydrochloric acid. The pH range is 2.0-3.0.

After a ATNAA has been activated, the empty container should be disposed of properly (see DOSAGE AND ADMINISTRATION).It cannot be refilled, nor can the protruding needle be retracted.

Atropine, an anticholinergic agent (muscarinic antagonist), occurs as white crystals, usually needle-like, or as a white, crystalline powder. It is slightly soluble in water, soluble in glycerin and ether, and freely soluble in alcohol and chloroform with a molecular weight of 289.38. Atropine, a naturally occurring belladonna alkaloid, is a racemic mixture of equal parts of d- and I- hyoscyamine, whose activity is due almost entirely to the levo isomer of the drug. Chemically, atropine is designated as 1[[alpha]]H,5[[alpha]]H-Tropan-3[[alpha]]-ol ([[plusmn]])-tropate. Its empirical formula is C17H23NO3 and its structural formula is:

Image from Drug Label Content

Pralidoxime chloride, a cholinesterase reactivator, is an odorless, white to pale-yellow crystalline powder, freely soluble in water, with a molecular weight of 172.61. Chemically, pralidoxime chloride is designated as 2-formyl-1-methylpyridinium chloride oxime. Its empirical formula is C7H9CIN2O and its structural formula is:

Image from Drug Label Content

The specific activity of the drug resides in the 2-formyl-1-methylpyridinium ion and is independent of the particular salt employed. The chloride salt is preferred because of physiologic compatibility, excellent water solubility at all temperatures, and high potency per gram, due to its low molecular weight.

Atnaa Manufacturers

  • Meridian Medical Technologies Inc
    Atnaa (Atropine And Pralidoxime Chloride) [Meridian Medical Technologies Inc]

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