Lawsuit Information Center

Chlorpyrifos lawsuits allege that repeated exposure to this widely used insecticide can contribute to Parkinson’s disease. The people most likely to bring these claims are farmers, pesticide applicators, pest control workers, groundskeepers, greenhouse employees, and others who personally mixed, loaded, sprayed, or cleaned up chlorpyrifos products over months or years.

Chlorpyrifos was sold under trade names that include Dursban, Lorsban, Cobalt, Nufos, Bolton, Stallion, Pilot, Warhawk, and Hatchet. It was used on farms, golf courses, ornamental plants, and residential and commercial properties. Many workers remember the trade name but not the active ingredient. Product identification is therefore one of the first and most important parts of investigating a claim.

If you have Parkinson’s disease after years of working with pesticides, you may have wondered whether that exposure played a role. A December 2025 study gives lawyers and scientists a serious reason to investigate chlorpyrifos. Researchers associated estimated long-term residential exposure near agricultural applications with more than 2.5 times the risk of Parkinson’s disease. They also found Parkinson’s-related brain damage in mice that inhaled chlorpyrifos.