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Parkinson’s Disease After Paraquat Exposure
Individual review of Parkinson’s disease and paraquat use
Some people diagnosed with Parkinson’s disease report years of work applying paraquat or working around its use. Whether a particular exposure contributed to a person’s disease is a complex medical and legal question. Logue Law Group reviews potential occupational injury matters throughout Pennsylvania; a diagnosis or exposure history alone does not establish a legal claim.
Medical care comes first
People with new or changing neurologic symptoms should seek medical evaluation from a qualified clinician. A lawyer cannot diagnose Parkinson’s disease or recommend treatment. Keep following your care team’s advice and retain records of evaluations, diagnoses, medications, referrals, and functional changes.
For a legal review, records may help confirm the diagnosis and its timing. Depending on the applicable court orders and facts, relevant materials may include notes from a movement-disorder specialist or neurologist, the date symptoms began, the date and basis of diagnosis, and the records relied on by medical experts. A billing code by itself may not answer every evidentiary question.
Exposure and causation are separate questions
A thorough review asks what product was used, when and where the work occurred, how paraquat was mixed or applied, how often it was used, what protective equipment was worn, and what records or witnesses support those facts. It also examines the medical history and other potential explanations for a disease. These questions require individualized evidence; no checklist can predict a case outcome.
See our guide to records and evidence of paraquat application for examples of work, product, equipment, and witness materials that may be useful.
What EPA and the courts have said
The science is disputed. EPA reports that studies on paraquat and Parkinson’s disease differ in quality and have produced conflicting results; EPA says it has not found a clear link between exposure from labeled uses and adverse health outcomes such as Parkinson’s disease. The fact that EPA permits restricted uses does not prove that every historical exposure was safe, and scientific disagreement does not itself prove that an individual exposure caused a particular diagnosis.
The litigation record also includes major adverse rulings. In April 2024, the MDL court excluded a plaintiffs’ general-causation expert in the first trial-selection cases, and those four cases were dismissed. The ruling concerned those cases and evidence; it was not a finding on every individual claim. Later proceedings have required detailed case-specific product-use, diagnosis, and expert proof for certain cases continuing outside the settlement process.
Settlement and case status
The federal MDL court’s records state that the parties entered a Master Settlement Agreement in August 2025. Court orders issued in 2026 address administration of that agreement and the handling of eligible cases that did not participate, ineligible cases, and later-filed cases. The terms, eligibility, deadlines, and effects of any settlement depend on the agreement and a person’s individual circumstances. No particular claimant should assume they qualify or that a payment is available based on general online information.
The official court docket changes over time. As of October 2026, the Southern District of Illinois continues to post orders in MDL No. 3004. A case-specific review should check the current docket and the rules that apply to the individual case.
What to preserve
- Neurology and movement-disorder records, diagnosis dates, treatment records, and medication history.
- Work, farm, and application history, including product names, dates, locations, and job duties.
- Purchase, label, training, licensing, application-log, and equipment records, if available.
- Names of people with firsthand knowledge of product use or work conditions.
- Notes showing when you first learned of a possible connection between paraquat and Parkinson’s disease.
Preserve existing materials safely. Do not handle pesticide containers or contact a former employer or potential defendant to investigate without legal advice. Deadlines can be strict and fact-dependent, so seek advice promptly.
Pennsylvania statewide consultations
Logue Law Group reviews potential claims across Pennsylvania, including Pittsburgh, Philadelphia, Erie, Harrisburg, Allentown, Scranton, Reading, Lancaster, York, and nearby communities. Call 412.387.6901 or use the contact page. Do not provide sensitive details through an unsecured form before an attorney-client relationship is established.