Pralidoxime iodide is primarily used as an antidote in the treatment of poisoning by organophosphate pesticides and nerve agents. It works by reactivating acetylcholinesterase, an enzyme that is inhibited by organophosphates, thereby restoring normal nerve function. This chemical is often administered in combination with atropine to counteract the effects of the poison more effectively. It is commonly used in emergency medical settings, including hospitals and military field operations, where exposure to such toxic substances can occur. Additionally, it is utilized in veterinary medicine to treat animals affected by organophosphate poisoning. Proper administration and dosage are crucial for its effectiveness and to minimize potential side effects.