The World Health Organization (WHO) recognizes pesticide poisoning as the single most important means of suicide globally, and intentional pesticide poisoning is estimated to be responsible for as many as 300,000 deaths every year in China and southeast Asia. In South Korea, poisoning is the second-most common cause of death, besides medical disease, at the emergency department (ED), and pesticides were the most common poisons used. Organophosphate, glyphosate, pyrethroid and glufosinate ammonium are common agents for suicide by pesticide overdose in South Korea after a production ban was placed on paraquat. This presentation review and aim to answer the clinical question: what are the effects of treatment for acute poisoning with these pesticides?