Yearly Archives: 2026
Detectable 1–10 Days: Ketamine Urine Testing, Clinician Steps
Most standard panels skip ketamine. Understand the 1 to 10 day urine window, when to request GC/MS confirmation, and how to verify sample validity.
Buyers: What SAMHSA Requires for Urine Specific Gravity Testing
Practical procurement checklist for urine specific gravity testing. Follow SAMHSA reporting rules, the 90–100°F temp check, QC steps, and pick cups or...
DOT vs Non DOT: How Employers Avoid Costly Compliance Mistakes
US primer for employers and safety pros on DOT's 5 drug urine rules, custody and Clearinghouse reporting, and buying compliant non DOT supplies.
Harm Reduction: 2.5 µg/mL Limits Make Xylazine Drug Tests Unreliable
Understand when residue strips work, why 2.5 µg/mL and 10 ng/mL cutoffs matter, and which harm reduction steps and lab confirmations to follow.
Under 20 ng/mL? Clinician’s Guide to Cotinine Urine Test Cutoffs
Understand cotinine urine test results: typical lab cutoffs (often <20 ng/mL), dilution and NRT confounders, specimen collection tips, and when to order...
2–8 Day Urine Window, False Positives, and Pro Kit Guidance for PCP Drug Tests
Understand PCP test detection windows (urine 2–8 days, hair ~90 days), common false positives, confirmatory testing, and how to choose professional test kits.
Don’t Buy a 7 Panel Drug Test Until You Check These 7 Analytes
Stop assuming "7 panel" means the same test. See which seven analytes matter, how analyte tables differ, and when to buy a cup versus order lab confirmation.
2,000 vs 1,000 ng/mL: Gabapentin Urine Test Gaps for Clinicians
Learn why standard 5 to 12 panel urine tests miss gabapentin, when LC-MS/MS detects it (about 2 to 4 days after dosing), and which assays clinicians...
Collectors: 90–100°F Rule to Prevent Heat Damage in Urine Drug Tests
When urine reads outside 90°F–100°F it flags validity. Learn how prolonged heat degrades metabolites and reagents and what collectors and labs must do to...
6 Step Bathroom Setup Checklist for Collectors: DOT/SAMHSA Compliant
DOT/SAMHSA aligned checklist for collectors running urine collections. Secure toilet water, remove adulterants, check cup temperature within minutes, and...