Types of Results

Negative Result

A negative result means that the drug or drugs being tested were not detected in your sample at or above the cutoff level. This is the most common result.

  • No drugs detected above the cutoff threshold
  • Result is typically available within 1-2 business days
  • No further action required for employment screening

Positive Result

A positive result on an initial screening test is always confirmed with a second, more specific test (GC-MS or LC-MS/MS) before being reported as positive.

  • Initial screen detected substances above cutoff
  • Confirmation testing performed for verification
  • Medical Review Officer (MRO) reviews prescription explanations

Inconclusive/Invalid

Sometimes a test cannot be completed properly. This may be due to:

  • Insufficient sample volume
  • Sample adulteration or tampering suspected
  • Lab error or equipment malfunction
  • Sample degradation

In these cases, a retest is typically required.

What If You Test Positive?

For Employment Testing

  • The Medical Review Officer (MRO) will contact you before reporting a positive result
  • Provide proof of any valid prescriptions that may explain the result
  • If no valid explanation, the result is reported to the employer
  • Consequences depend on company policy (denial of job, termination, etc.)

For Legal/Court-Ordered Testing

  • Positive results are reported to the appropriate authority
  • May affect probation, custody, or other legal matters
  • Consult with your attorney about your options

False Positives

While rare with modern confirmation testing, false positives can occur due to:

  • Cross-reactivity with certain medications
  • Lab errors
  • Contamination

If you believe your result is incorrect, request a retest of your original sample or provide documentation of any medications you're taking.

Can Results Be Wrong?

Drug tests are highly accurate, but no test is 100% perfect:

  • Initial screening: 95-99% accurate, but more prone to false positives
  • Confirmation testing: Nearly 100% accurate when properly performed

If you have concerns about your result, consult with the testing facility or a Medical Review Officer.