About Chlorpyrifos Exposure & Parkinson's Risk
Chlorpyrifos is an organophosphate insecticide that has been used since 1965 to control insects on crops like fruits, vegetables, and wheat. Golf courses, greenhouses, nurseries, and sod farms have also been known to use chlorpyrifos.
A recent study found that occupational chlorpyrifos exposure was associated with up to a 174% increased risk of developing Parkinson's disease, while long-term residential exposure was associated with more than a 2.5-fold increased risk.
Patients diagnosed with Parkinson's disease after chlorpyrifos exposure are now filing lawsuits alleging manufacturers knew or should have known about these risks but failed to provide adequate warnings.
Chlorpyrifos and Parkinson's Disease Lawsuits at a Glance
- The first known chlorpyrifos Parkinson's disease lawsuit was filed in June 2026 by a pest control company worker exposed on the job.
- Chlorpyrifos is an organophosphate insecticide that interferes with cholinesterase, an enzyme essential for normal nervous system function.
- The insecticide has been sold under brand names including Lorsban®, Dursban®, LOCK-ON®, and Cobalt®.
- Chlorpyrifos lawsuits allege manufacturers failed to adequately study or warn about chlorpyrifos's long-term neurological risks, including Parkinson's disease.
- Defendants include manufacturers and distributors such as Corteva Inc., Corteva Agriscience LLC, The Dow Chemical Company, and FMC Corporation.
Although chlorpyrifos was banned for most residential uses around 2000, it continues to be used in agriculture. Farm workers, pesticide applicators, and others who mix, load, or apply the chemical may experience significant exposure.
How Does Chlorpyrifos Cause Parkinson's Disease?
Researchers believe chlorpyrifos may contribute to Parkinson's disease by damaging the nervous system and inhibiting cholinesterase, an enzyme essential for normal nerve function. Studies suggest the pesticide can trigger chronic inflammation, oxidative stress, and the loss of dopamine-producing brain cells.
Chlorpyrifos exposure caused movement impairments, dopamine neuron loss, and the buildup of abnormal alpha-synuclein proteins associated with Parkinson's disease, according to a study published in Molecular Neurodegeneration.
“This study establishes chlorpyrifos as a specific environmental risk factor for Parkinson’s disease, not just pesticides as a general class.”
– Dr. Jeff Bronstein, UCLA Health
If you were diagnosed with Parkinson's disease after chlorpyrifos exposure, you may have legal options. Compensation from a chlorpyrifos lawsuit can help cover medical bills, lost wages, and more.
At Sokolove Law, we’ve secured billions of dollars for patients harmed by dangerous products. Let our team fight for you.
Get the Help You Deserve
We’ve helped thousands of families hold powerful chemical companies accountable. Find out if you may be able to file a chlorpyrifos Parkinson's lawsuit.
Who Can File a Chlorpyrifos Claim?
Individuals who worked with chlorpyrifos or were exposed to it over many years and later developed Parkinson's disease may be able to pursue a chlorpyrifos claim for compensation.
Agricultural workers and pesticide applicators are among those most likely to have been exposed. Workers who mixed, loaded, or applied the pesticide using aerial equipment, sprayers, or hand wands are particularly at risk.
You may be able to file a chlorpyrifos lawsuit if you or a loved one:
- Was exposed to chlorpyrifos through your job or while living in areas where the insecticide was sprayed
- Has been diagnosed with Parkinson's disease
Researchers have also identified an elevated risk of Parkinson's disease among people with long-term residential exposure, such as those who lived near areas where chlorpyrifos was routinely applied.
It’s important to act quickly. Each state has laws called statutes of limitations, which limit how long you have to take legal action. Once this deadline passes, you may lose your right to seek a chlorpyrifos lawsuit payout.
Chlorpyrifos Lawsuit Update & News
As evidence linking chlorpyrifos to Parkinson's disease continues to emerge, regulators, researchers, and the courts have taken a closer look at the pesticide and its potential long-term neurological effects.
At the same time, injured workers have begun filing lawsuits alleging manufacturers failed to adequately study or warn about these risks.
Chlorpyrifos lawsuit updates include:
- June 2026: The first known chlorpyrifos Parkinson's disease lawsuit was filed in Pennsylvania on behalf of a former pest control worker alleging decades of exposure caused his illness.
- December 2024: The U.S. Environmental Agency (EPA) proposed revoking nearly all remaining food uses of chlorpyrifos, leaving only limited registrations for 11 crops in certain states.
- January 2024: Several states, including Hawaii, California, New York, Maryland, Maine, and Oregon, moved to phase out or ban most uses of chlorpyrifos.
- November 2023: The 8th Circuit reinstated certain chlorpyrifos food tolerances after vacating the EPA's 2021 nationwide food-use ban.
- February 2020: Corteva, the largest manufacturer of chlorpyrifos, announced that they would stop manufacturing chlorpyrifos products due to concerns about the harm to human health.
- October 2015: The EPA proposed banning chlorpyrifos on food crops because of concerns about neurological risks.
- May 1995: The EPA fined DowElanco, a predecessor to Dow AgroSciences, $732,000 for failing to report adverse health incidents, including chronic neurological effects linked to chlorpyrifos.
As lawsuits move forward, these developments may play an important role in determining what manufacturers knew about chlorpyrifos' potential neurological risks and when they knew it.
First Chlorpyrifos Parkinson's Disease Lawsuit Filed
In June 2026, the first known chlorpyrifos Parkinson's disease lawsuit was filed in the Philadelphia County Court of Common Pleas by a former pest control worker.
The victim was allegedly exposed to chlorpyrifos while mixing and applying the pesticide from 1992 through 2015 using truck-mounted tanks, handheld sprayers, and other application methods. He was diagnosed with Parkinson's disease in 2017.
The lawsuit alleges the defendants knew or should have known that long-term exposure to chlorpyrifos could contribute to Parkinson's disease but failed to adequately study, disclose, or warn about those risks.
“Since Dow first applied to patent it, chlorpyrifos’s inventors, formulators, distributors, and sellers have known that chlorpyrifos is toxic to the human brain."
– Chlorpyrifos Parkinson's Lawsuit
How to File a Chlorpyrifos Parkinson's Disease Lawsuit
At Sokolove Law, we believe workers and families deserve answers when exposure to a dangerous product may have contributed to a serious illness like Parkinson's disease.
Our attorneys can handle every stage of your chlorpyrifos lawsuit, so you can focus on your health and your family. We work to identify your exposure history, gather the evidence needed to support your claim, and pursue the compensation you deserve.
Chlorpyrifos lawyers can help by:
- Providing a free case review to determine whether you may qualify to file a claim
- Investigating your work and exposure history, including where and how you may have come into contact with chlorpyrifos
- Collecting medical records, employment records, and expert evidence to support your case
- Filing your chlorpyrifos lawsuit before the applicable legal deadlines expire
- Negotiating with the defendant(s) in an effort to reach a settlement
- Taking your case to trial if a chlorpyrifos settlement cannot be reached
A successful chlorpyrifos lawsuit may provide compensation for medical expenses, lost income, pain and suffering, and other losses related to a Parkinson's disease diagnosis.
Get Help from Top Chlorpyrifos Lawsuit Lawyers
Pursuing a lawsuit against major chemical manufacturers can be overwhelming, especially while managing a Parkinson's disease diagnosis.
At Sokolove Law, we're committed to helping individuals and families seek accountability from companies that failed to adequately warn about the dangers of chlorpyrifos exposure.
Why do families trust Sokolove Law?
- More Than 45 Years of Experience: Since 1979, we've represented clients harmed by dangerous products, toxic exposures, and corporate negligence.
- Over $10.5 Billion Recovered: Our firm has secured substantial compensation for victims injured by defective products, exposure to hazardous substances, and more.
- Nationwide Representation: Our team can handle complex injury cases across all 50 states and has the resources to take on large corporations.
- No Upfront Fees: We work on a contingency-fee basis, so you pay nothing unless we recover compensation for you.
If you or a loved one developed Parkinson's disease after chlorpyrifos exposure, our team is here to review your case, explain your options, and fight for the compensation you may deserve.
Call (800) 995-1212 right now or fill out our form for a free case review. We're ready to answer your questions and fight for the justice you deserve.
Chlorpyrifos Lawyer FAQs
What is the chlorpyrifos lawsuit about?
Chlorpyrifos lawsuits allege that the manufacturers knew or should have known about the insecticide's link to Parkinson's disease but failed to adequately study, disclose, or warn users of that potential risk.
Victims seek compensation for medical expenses, lost income, pain and suffering, and other damages related to their diagnosis.
Is chlorpyrifos linked to Parkinson's disease?
Yes, a growing body of research suggests that long-term chlorpyrifos exposure may increase the risk of developing Parkinson's disease.
A 2025 study found that occupational exposure was associated with up to a 174% increased risk of Parkinson's disease, while long-term residential exposure was associated with more than a 2.5-fold increased risk.
If you or a loved one was exposed to chlorpyrifos and later developed Parkinson's, we may be able to help. Get started with a free case review.
What are chlorpyrifos poisoning symptoms?
Chlorpyrifos poisoning can occur after breathing in, swallowing, or absorbing large amounts of the insecticide through the skin. Because chlorpyrifos affects the nervous system, symptoms may develop within minutes or hours of exposure.
Chlorpyrifos poisoning symptoms include:
- Blurred vision or pinpoint pupils
- Difficulty breathing
- Dizziness
- Excessive sweating
- Headache
- Muscle twitching or weakness
- Nausea and vomiting
Severe poisoning can lead to seizures, respiratory failure, or coma and requires immediate medical attention.
Who makes chlorpyrifos?
Chlorpyrifos has been manufactured and distributed by companies including The Dow Chemical Company, Corteva Inc. (formerly Dow AgroSciences LLC), Corteva Agriscience LLC, FMC Corp., and Gharda Chemicals International, among others.
Is there a chlorpyrifos class action?
Chlorpyrifos Parkinson's disease cases are being filed as individual lawsuits rather than as a class action. The first known case was filed in Philadelphia County Court of Common Pleas in June 2026.
How much is a chlorpyrifos Parkinson's disease lawsuit worth?
Because chlorpyrifos Parkinson's disease litigation is still in its early stages, it's too soon to know how much these lawsuits may be worth.
However, patients who pursue a claim may be able to recover compensation for:
- Past and future medical expenses
- Lost wages and reduced earning capacity
- Pain and suffering
- Disability and reduced quality of life
- Other losses related to a Parkinson's disease diagnosis
The value of a chlorpyrifos lawsuit will depend on the severity of your condition, the extent of your exposure, and the evidence supporting your claim.
How much does a chlorpyrifos lawyer cost?
At Sokolove Law, our chlorpyrifos lawyers work on a contingency-fee basis. That means you pay no upfront costs or hourly legal fees. Instead, your attorney is paid only if they successfully recover compensation for you. Call (800) 995-1212 to find out about your legal options.
