Request the test results and full documentation (chain of custody, specimen ID, collection records, instrument/method used, cutoff values, and lab accreditation)
Ask for the lab’s specific confirmation method (e.g., GC/MS or LC-MS/MS) and the quantitative values reported
Contact the testing company/employer or the collection site to confirm whether the result was screened only or confirmed
Request a retest at the same, certified laboratory using the remaining specimen (if available)
Request a split-sample test (if your jurisdiction/employer program allows) or confirm whether a split specimen was collected
Request access to the original sample handling and chain-of-custody records
Submit a written dispute immediately within the required deadline
Provide documentation of all medications, supplements, and prescriptions taken within the relevant window
Provide proof of prescriptions (pharmacy receipts, prescription labels, doctor notes)
Identify any products that could cause cross-reactivity and provide product labels/ingredients if available
Request information on potential lab or specimen issues (mislabeling, contamination, custody breaks, temperature/handling failures)
Ask whether the lab can provide the chromatograms/analytical data supporting the result
Request a review by a Medical Review Officer (MRO) if the program uses an MRO
Ask for an opportunity to explain through the MRO process before any final determination
If the result is disputed, request that the MRO/lab consider confirmatory testing and any medical documentation
Consider independent testing of the same or a new specimen at a reputable, certified lab if permitted
If you have a legitimate medical need, provide clinician documentation supporting prescribed use
If the test is employment-related, review your company policy and any collective bargaining agreement
For legal or regulatory contexts, contact a local attorney or legal aid organization familiar with drug testing disputes
Follow all procedural requirements exactly (form completion, deadlines, submission methods)
Keep copies of everything submitted and record dates/times of all communications
Request written confirmation of each action taken (retest request, split-sample request, data request)