Chlorpyrifos Lawsuit: Parkinson’s Disease Claims and How to Take Action
Lawsuits claim that farmers and agricultural workers exposed to chlorpyrifos-based pesticides developed Parkinson’s disease and that manufacturers failed to warn the public. Some cases also claim exposure led to neurodevelopmental disorders in children.
What Is a Chlorpyrifos Lawsuit?
Lawyers are investigating lawsuits on behalf of farmworkers, agricultural employees, pesticide applicators and other people who were exposed to chlorpyrifos pesticides and later developed Parkinson’s disease.
Chlorpyrifos lawsuits also claim exposure to the chemical can cause neurodevelopmental disorders in children.
Chlorpyrifos is used to control insects and foliage. The insecticide has been linked to an increased risk of Parkinson’s disease. According to lawsuits, manufacturers knew or should have known that chlorpyrifos could cause Parkinson’s disease, but they didn’t properly warn the public.
At one time, the Environmental Protection Agency (EPA) temporarily banned chlorpyrifos before restricting its use to 11 specific crops in the U.S.
This litigation is in the initial stages, and lawyers are still accepting cases in 2026.
Products That Contain Chlorpyrifos in Lawsuits
The main chlorpyrifos-containing products in lawsuits are manufactured by The Dow Chemical Company and FMC Corporation.
- Bolton
- Cobalt Advanced
- Duret
- Dursban
- Govern
- Hatchet
- Lock-On
- Lorsban
- Match-Up
- Nufos
- Stallion
- Vulcan
- Warhawk
- Whirlwind
- Yuma
Defendants named in lawsuits include Corteva, Inc., Corteva Agriscience LLC, The Dow Chemical Company and FMC Corporation.
Signs You Might Have Parkinson’s Disease After Using Chlorpyrifos
Some of the warning signs of Parkinson’s disease include tremors, body stiffness and changes in smell or sleep.
If you were exposed to chlorpyrifos as a farmer, agricultural worker or insecticide applicator, you may be at higher risk of developing Parkinson’s disease. A December 2025 animal study in Molecular Neurodegeneration found that exposure to chlorpyrifos was associated with a more than 2.5-fold increased risk of developing Parkinson’s disease.
- Changes in speech, such as speaking softly or quickly, slurring or hesitating before talking.
- Depression, anxiety, constipation and sleep problems.
- Loss of automatic movements, such as blinking, smiling or swinging your arms when you walk.
- Poor posture and balance, including falls.
- Slow movement, such as difficulty getting out of a chair, getting dressed or even blinking.
- Stiff muscles that may feel tense and painful.
- Tremors that begin in the hands or fingers and sometimes in the jaw or foot.
- Trouble writing or changes in handwriting.
If you’ve had exposure to toxic pesticides such as chlorpyriphos, make sure you tell your doctor about any of these symptoms. You may also want to talk to an attorney to learn about your legal options. Consumer Notice can help you see if you qualify with a free case review, and there’s no pressure to file a lawsuit.
How Lawsuits Say Chlorpyrifos Is Linked to Parkinson’s
Lawsuits say that because chlorpyrifos works by affecting enzymes in the brains of insects, it also affects the human brain, leading to Parkinson’s disease and other neurological problems.
Despite mounting evidence of the chemical’s effect on the brain, lawsuits claim insecticide manufacturers continued to sell their products without warning Americans.
Do You Qualify for a Chlorpyrifos Parkinson’s Disease Lawsuit?
If you were exposed to chlorpyrifos and developed Parkinson’s disease, you may qualify to file a lawsuit. If your child was exposed to chlorpyrifos and developed a neurodevelopmental disorder, you may also be eligible.
While each case is different, lawyers generally consider certain criteria to determine whether a person qualifies.
- Chlorpyrifos exposure for at least 5 days in California, Washington, Pennsylvania or Illinois. For children, the exposure must have been in the first four years of life.
- An official medical diagnosis of Parkinson’s disease (in an adult) or a neurodevelopmental disorder (in a child) with the name of the diagnosing physician.
- Documentation of your child’s special school accommodations or programs they are enrolled in because of neurodevelopmental disorders.
- Proof of exposure to chlorpyrifos-containing pesticide brands: Lorsban, Bolton, Stallion, Govern, Hatchet, Vulcan, Warhawk, Whirlwind, Yuma, Cobalt Advanced, Match-Up or Duret.
- Provide the name and address of farms where exposure is alleged or the address where you lived when you were exposed to pesticides from a nearby farm.
- For birth injuries, the mother’s exposure must have been during pregnancy.
Lawyers usually work with farmers, agricultural workers, pesticide applicators and chemical mixers who may have been exposed to chlorpyriphos on the job, but you or your child may also have been exposed by living near agricultural areas.
If you’re not sure if you qualify, contact an attorney. They can tell you if you qualify based on the specific facts of your case. A free case review with Consumer Notice can help you learn if you’re eligible for a chlorpyrifos lawsuit.
What's Happening With Chlorpyrifos Parkinson’s Disease Cases in 2026?
So far, chlorpyrifos Parkinson’s disease cases are in the initial stages and lawyers have just begun to file lawsuits. There haven’t been any global settlements or jury verdicts yet.
Alexander Ramos filed one of the most recent chlorpyrifos lawsuits in the Court of Common Pleas in Philadelphia in June 2026. Ramos worked for a pest control company where he was exposed to chlorpyriphos between 1992 and 2015. He mixed the chemical and used handheld sprayers on truck-mounted tanks. Doctors diagnosed him with Parkinson’s in 2017.
What to Do If You Think You Qualify
If you think you qualify, talk to your doctor about your diagnosis and reach out to an attorney.
- If you or your child were exposed to chlorpyrifos, don't assume your symptoms are just regular signs of aging. Talk to your doctor about the issues you are experiencing and tell them about your chemical exposure. If you or your child received a diagnosis, make sure to follow up with your medical provider about any potential connections to chlorpyrifos.
- Request any medical records that show a Parkinson’s diagnosis or your child’s neurodevelopmental disorder. These records will be important if you decide to pursue legal action. You should also gather documents that prove chlorpyriphos exposure. You’ll also need your child's school records to highlight any accommodations or special programs they are enrolled in because of their neurodevelopmental disorders.
- Consumer Notice offers free, confidential case reviews and you never have an obligation to file a claim. Lawyers who handle toxic pesticide cases can review your records and tell you if you may qualify to file a lawsuit. There is no cost to learn about your legal options.
Frequently Asked Questions About Chlorpyrifos Lawsuits
- Why are people filing chlorpyrifos lawsuits?
- People are filing chlorpyrifos lawsuits after they were exposed to chlorpyrifos and later developed Parkinson’s disease. Lawsuits allege pesticide manufacturers know the chemical was dangerous but didn’t warn the public. Parents are also suing the manufacturers over claims that chlorpyrifos exposure led to developmental and neurological disorders in children.
- Are there other pesticide or herbicide lawsuits for Parkinson’s disease?
- Yes. Lawyers are also filing paraquat herbicide lawsuits on behalf of people exposed to paraquat who later received a Parkinson’s diagnosis. Other health conditions have also been linked to agricultural chemicals. Lawsuits against the makers of Roundup claim that the popular weed killer contributes to the development of non-Hodgkin lymphoma.
- Is there a time limit to file a chlorpyrifos lawsuit?
- Yes. Each state has a time limit called a statute of limitations, which varies by location. In the case of toxic exposures, the time limit may start to count down from the time you knew chlorpyrifos could have caused your Parkinson’s disease, not from the date you used chlorpyrifos or your diagnosis date. Check with an attorney for the deadlines in your specific case.
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- Environmental Protection Agency. (2026, January 6). EPA Update on the Use of the Pesticide Chlorpyrifos on Food. Retrieved from https://www.epa.gov/pesticide-worker-safety/epa-update-use-pesticide-chlorpyrifos-food
- Kazi, M.H. et al. (2025, December 11). The Pesticide Chlorpyrifos Increases the Risk of Parkinson’s Disease. Retrieved from https://link.springer.com/article/10.1186/s13024-025-00915-z
- Environmental Protection Agency. (2025, September 8). Frequently Asked Questions about the Current Status of Chlorpyrifos and Anticipated Path Forward. Retrieved from https://www.epa.gov/ingredients-used-pesticide-products/frequently-asked-questions-about-current-status-chlorpyrifos
- Environmental Protection Agency. (2025, September 8). Chlorpyrifos. Retrieved from https://www.epa.gov/ingredients-used-pesticide-products/chlorpyrifos
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