Types of Drug Tests
Currently there are two main options for drug testing: Instant and Lab Based Drug Test.
Instant drug test
An instant drug test is exactly as its name implies—you get the results right away, at the point where it's collected, usually within a few minutes. It's what we call an immunoassay screening; its purpose is to detect any presence of drugs in the specimen. The result is either negative (it's not present) or non-negative (it is present). An instant drug test can't officially give a "positive" result.
Lab based drug test
Lab-based drug tests are more accurate. We like to say they are more rigorous, more involved, and more defensible in a court of law, all of which are elements certain organizations must consider, particularly heavily regulated industries, like the DOT.
When we say lab-based testing is "more involved," here's what we mean:
The lab will conduct an initial screening to determine if the specimen is clean of any drugs or if it has some type of drug metabolite in it. If the answer is yes to the drug metabolite, then the lab runs it through a more advanced process to confirm what the drug is, it will specifically identify the chemical makeup and the quantity.
Another layer of rigor comes with the Medical Review Officer (MRO). The DOT defines an MRO as a person who is a licensed physician and who is responsible for receiving, reviewing laboratory results and evaluating medical explanations for certain drug test results.
Drug Tests are commonly used for five categories of drugs:
- Amphetamines
- Cocaine
- Opiates
- Marijuana
- Phencyclidine
Additional categories may include barbiturates, Benzodiazepines, ethanol (alcohol), hydrocodone, MDMA, methadone, methaqualone, or propoxyphene.
Reasons for Drug Testing
Random Tests
Random tests are the most effective for deterring illicit drug use. Employers conduct random tests using an unpredictable selection process.
Pre-employment
You can make passing a drug test a condition of employment. With this approach, all job candidates will receive drug testing prior to being hired.
Annual Physical Tests
You can test your employees for alcohol and other drug use as part of an annual physical examination. Be sure to inform employees that drug-testing will be part of the exam. Failure to provide prior notification is a violation of the employee's constitutional rights.
For-cause and Reasonable Suspicion Tests
You may decide to test employees who show discernible signs of being unfit for duty (for-cause testing), or who have a documented pattern of unsafe work behavior (reasonable suspicion testing.) These kinds of tests help to protect the safety and wellbeing of the employee and other coworkers.
Post-accident Tests
Testing employees who were involved in a workplace accident or unsafe practices can help determine whether alcohol or other drug use was a contributing factor to the incident.
Post-treatment Tests
Testing employees who return to work after completing a rehabilitation program can encourage them to remain drug-free.