The study looked at how a drug called olmesartan can help protect rats from lung injury caused by a toxic substance called paraquat. The researchers divided the rats into different groups and gave them different doses of olmesartan after poisoning them with paraquat. They found that olmesartan helped increase certain protective enzymes in the lungs and reduce harmful substances, with the highest dose showing the most benefit. The drug also helped decrease lung damage and fibrous tissue growth. This suggests that olmesartan may have a protective effect on lung injury caused by paraquat.