Urine Testing is the most common method and detects drug use that occurred in the past few days (typically 1–4 days, depending on the substance). It's widely accepted for workplace and legal testing.

Oral Fluid Testing (saliva) detects more recent use, typically within the past 24–48 hours. It’s less invasive and ideal for post-accident or reasonable suspicion testing, but may not be accepted in all legal contexts.

Cut-off levels are the minimum concentrations of a drug or its metabolite that must be present in the sample to be reported as positive. These thresholds help prevent false positives from passive exposure or trace amounts. Each panel and substance has its own designated cut-off level, based on federal or lab-specific guidelines.

Detection times vary based on the drug, the testing method, and the individual’s metabolism. General ranges include:

• Urine Testing: 1 to 30 days (depending on the drug)

• Oral Fluid: Up to 48 hours

• Hair Testing: Up to 90 days

• Blood Testing: A few hours to a couple of days

For example, marijuana may be detectable in urine for several weeks with chronic use, while cocaine typically clears within 2–4 days.

Healthcare and MedPro panels are specialized drug testing panels designed for professionals in medical, pharmaceutical, and clinical environments. These tests often include a broader spectrum of prescription medications and synthetic drugs to ensure safe and compliant workplaces in high-risk fields.

Yes. NATIONAL TESTING SERVICES offers ChildGuard® Hair Testing — a unique and confidential way to detect drug exposure in children, even if they haven't directly used drugs themselves. This method helps parents identify potential secondhand or environmental drug exposure and supports informed family decisions.