How Accurate Are Rapid or Instant Drug Tests Compared to Laboratory Testing?

Rapid or instant drug tests are convenient tools that provide visual results within minutes of sample collection. These point-of-collection tests are designed to be sensitive, so they can quickly identify samples that are clear of substances. If a rapid test yields a negative result, the process concludes immediately, saving time and administrative costs.

Despite their convenience, rapid tests are intended only as preliminary screenings because they are more susceptible to false positives. They do not identify specific substances as precisely as a laboratory. Therefore, any result that is not clearly negative on a rapid test must be sent to a certified laboratory for confirmation.

Laboratory testing uses advanced technology to confirm results. Certified labs perform a secondary confirmation test that identifies and measures specific drug molecules, which helps reduce false positives caused by cross-reacting substances. Laboratory testing typically takes one to three days and provides the legally defensible results used for employment decisions.