Understanding exactly what DOT tests for can save your career. Here’s the complete breakdown.
The DOT 5-Panel Test
Per 49 CFR Part 40, DOT tests for:
1. Marijuana (THC)
- Cutoff: 50 ng/mL (screen), 15 ng/mL (confirm)
- Most common violation
2. Cocaine
- Cutoff: 150 ng/mL (screen), 100 ng/mL (confirm)
- Detected 2-4 days typically
3. Amphetamines
- Includes methamphetamine
- Cutoff: 500 ng/mL (screen)
- Prescription ADHD meds may cause positives
4. Opioids
- Expanded panel includes oxycodone, hydrocodone
- Prescription painkillers need MRO verification
5. Phencyclidine (PCP)
- Cutoff: 25 ng/mL
- Least common positive
Prescription Medications
If you have a valid prescription:
- Tell the MRO (Medical Review Officer) AFTER the test
- Provide prescription documentation
- MRO will determine if it’s a verified negative
What About Alcohol?
Alcohol testing is separate:
- BAC 0.02-0.039 = 24-hour removal
- BAC 0.04+ = Full violation
Stay clean, stay driving!
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