Introduction:Respiratory failure is the most common complication following acute organophosphorus compound poisoning occurs in up to 34% to 56% of patients and is associated with high morbidity and mortality.

Methodology: A detailed clinical examination of patients was done. In patients with respiratory failure, oxygen saturation using pulse oximeter, and with arterial blood gas analysis was done. Other relevant investigations available in the infrastructure was done wherever required.

Results: 43.8% patients were under mild grading, 42% were moderate grading and 14.2% were severe poisoning grading

Conclusion: As the severity of poisoning is more the more number of patients develop respiratory failure.