Published February 8, 2026 · Parkinson's Lawsuit Help
A common question from claimants: 'Can a blood test show whether I was exposed to paraquat?' The short answer is no — not in a way that helps a long-latency Parkinson's claim. Here's why, and what does matter.
Paraquat is cleared from the body quickly
Paraquat has a relatively short biological half-life. Within days to a few weeks of exposure, blood and urine levels return to baseline. A negative test today says nothing about whether you were exposed twenty years ago.
What actually documents exposure
Exposure documentation comes from employment records, EPA pesticide applicator records, witness statements from co-workers and family, purchase records, and your own consistent testimony. Industrial hygienists can reconstruct cumulative exposure from these sources.
How Parkinson's is diagnosed
Parkinson's diagnosis is clinical, based on the presence of bradykinesia plus tremor and/or rigidity, with progression over time and response to dopaminergic therapy. DaT-SPECT imaging can support the diagnosis when clinical features are ambiguous. Movement disorder specialists are more accurate than general neurologists.
Differential diagnosis matters
For litigation purposes, your neurologist should rule out conditions that mimic Parkinson's disease — essential tremor, drug-induced parkinsonism, vascular parkinsonism, progressive supranuclear palsy, multiple system atrophy, and others. A clean differential diagnosis strengthens both medical care and legal claim.
Records to preserve
Preserve neurologist notes, imaging reports, medication history, and any prior Parkinson's-related referrals. Photographs of you spraying paraquat, payroll records from agricultural employers, and any pesticide applicator license records are gold-standard exposure documentation.
Get a free case review
If you or a family member were exposed to paraquat and have been diagnosed with Parkinson's disease, request a free case review. It takes 15 to 30 minutes by phone, costs nothing, and locks in your place while settlement options remain open. Check eligibility or call (717) 724-7503.