Employers currently have two choices regarding workplace drug testing: laboratory-based or on-site, rapid-based testing. We will discuss each approach’s advantages and disadvantages, influenced by accuracy, time, cost, and other factors. While this article explores the pros and cons of lab-based versus on-site rapid testing, our review suggests that employers should consider using a hybrid approach, leveraging the key advantages of both methods. If you are new to drug testing, starting with this overview for employers, Understanding Employer Drug Screening: A Positive Step Towards a Safer Workplace, may be helpful reading first.
Typically, there are two main ways for employers to implement lab-based drug testing programs:
1
A specimen collector or a Third-Party Administrator (TPA) comes to your work facility and collects the samples. These experts typically have taken coursework and are certified to collect and handle specimens (e.g., usually urine or saliva, less often hair and blood) from each employee using specific protocols. After collecting the samples, the specimen collector labels them and sends them (by priority mail or courier service) to a local laboratory for testing analysis.
2
HR or the employer’s supervisor tells the employee to get tested at a local lab, such as Quest or LabCorp. Therefore, the employee must make an appointment, leave work, and physically attend this testing facility. Some employers have contracts with local urgent care facilities that have the staff to collect the samples, and these facilities provide the samples to a local lab.
The process is relatively straightforward, but these labs are busy, and it can take time to schedule an appointment and 2-5 days to complete the entire process. On the day of the appointment, the employee travels to the lab facility, checks in, waits in the lobby, and then provides a urine or saliva sample for the lab. The lab technician collects the sample, labels it, and usually the results online on a secure website portal in 2-3 days.
After collection, these labs can often perform two types of tests:
After collection, the samples are physically mailed or couriered to a local lab. Testing samples are batched and processed in lots and results typically take 2-5 days.
Employer performing an onsite test in an office setting. The process includes the collection, analysis, and results, can take 10 to 20 minutes, and equips the employer with actionable information to ensure workplace safety. There are two types of rapid tests: One that uses Urine and one that uses Saliva. This article will focus on the Saliva-Based method please read the article, Compare Drug Testing Methods to contrast saliva-based from urine-based drug testing.
Over the last ten years, new portable technology has allowed employers to conduct onsite testing or an immunoassay that takes a saliva sample and detects the parent drug Delta-9 THC. The devices range from the size of a suitcase to handheld devices that are not much bigger than your smartphone. The onsite drug test includes all three components below and all the reagents and supplies to conduct drug testing at the point of care (POC) or onsite.
Device Reader
A reusable reader scans and analyzes the metabolites in the sample.
Cartridge
Some manufacturers have developed a disposable cartridge that attaches to the collection tube and slides into the Device Reader. This elegant process ensures the sample is processed correctly and reproducibly for accurate results.
Collection Specimen Kit
This kit has all the disposable, one-time-use plastic components to take the saliva sample. This kit includes the oral swap and collection tube to ensure the sample does not leak or get contaminated.
Accurate Detection of Recent Cannabis Use: A Saliva test detects the parent drug Delta-9 THC, and this metabolite is only present in saliva within the detection window of 30 minutes to up to 10 hours. This detection window overlaps best with cannabis impairment, and experts designate this as recent-use testing.
Speed of Results: Rapid tests provide results within 10-20 minutes, allowing employers to make actionable decisions, especially in critical safety-sensitive environments. This swift turnaround is advantageous for various industries and testing scenarios, providing a clear next step.
Convenience and Ease of Use: On-site tests are designed for simplicity, where HR or supervisors can efficiently conduct a test using the portable device and kit.
Cost-Effectiveness: The cost of rapid testing is often more cost-effective than lab-based testing, and I have outlined some of the more common reasons below.
Qualitative Measurement: On-site rapid tests are often preliminary drug screening tests. These portable devices provide a binary Yes or No result on drug detection and usually do not provide a quantitative measurement. The employer should check the manufacturer’s instructions and validation data to determine the best implementation for the company.
Limited Drug Panel: Rapid tests typically screen for a narrower range of drugs than lab tests. This limitation can result in omitting newer synthetic drugs or specific prescription medications. According to the Quest Diagnostics report, marijuana drug tests are the most prevalent and have the highest positivity rates. (2)
Legal and Compliance Risks: The cannabis landscape is evolving rapidly with new federal and state cases. It is prudent for employers to consult their legal team and outside counsel to comply with state and federal statutes and update their HR and corporate policies to mitigate risk and ensure safety. For additional information on best practices, please click the link to read the article on Employer Drug Testing – Policies and Procedures.
Employers are encouraged to refer to resources from the Substance Abuse and Mental Health Services Administration (SAMHSA), the Department of Transportation (DOT), and other relevant regulatory bodies.
1. Substance Abuse and Mental Health Services Administration (SAMHSA): Guidelines for Workplace Drug Testing
2. Department of Transportation (DOT): DOT Drug Testing: Part 40 – Employee Testing
Consulting with legal counsel can also ensure that drug testing policies comply with applicable laws and regulations, mitigating risks and safeguarding workplace safety and productivity. Employers should always stay informed of the latest regulations and technologies in drug testing to make informed decisions that align with their organizational policies and legal obligations.
Many recent published reports by the scientific community show that saliva has emerged as the best method for assessing recent cannabis use compared to blood or urine. (6-9) Saliva directly tests for the active delta-9 THC compound with a less variable time window of detection from within 30 minutes (smoked and longer for edibles) to 12 hours, better aligning with impairment. In contrast, urine tests detect inactive THC metabolites such as THC-COOH, which can not distinguish past use from recent use. (10,11) For more details on technical differences between oral fluid or saliva tests and urine or blood tests, please read Comparing Drug Testing Methods – Pros and Cons for Each Drug Test.
The choice between lab-based and on-site rapid testing depends on the employer’s requirements and circumstances. In our current cannabis climate, employers are more concerned about whether or not employees are fit to work during working hours and less worried about off-hour drug use. This makes urine testing inadequate and often unfair because it confirms the past use of cannabis consumption over the last 30 days.
As employers weigh the pros and cons of each method, many companies are navigating towards a hybrid approach. The hybrid approach utilizes the critical benefits of an on-site rapid test for the initial drug screen detecting recent cannabis use, and the results of this test guide whether or not to perform and incur the additional costs of lab testing. This quick, practical, and objective approach assesses whether employees can safely execute and complete their tasks. Distinguishing between recent use versus past use can help employers retain productive employees who casually consume cannabis during off hours or on their own free time from employees who consume cannabis shortly before or during work hours.
The hybrid drug testing approach uses the combination of an initial screening test and a confirmation lab test. The initial screen uses the portable device, a collection tube with a swab that fits into a disposable cartridge that slides into the device. In 15 minutes, the Xaliva THC device provides a negative or non-negative result. If the result is non-negative then a confirmation lab test is recommended. At Ricovr Healthcare, the Xaliva THC solution (e.g., Xaliva THC device reader, disposable cartridge, and collections kits) can differentiate recent use from past use with onsite cannabis testing. Onsite testing equips the company with a new tool to ensure safety. The technology can be leveraged company-wide as a deterrent that consuming before and during work is not tolerated since the Xaliva THC solution will detect Delta-9 THC in their employees’ body-altering their behavior at work and causing a safety risk to themselves or their peers.
The Xaliva THC solution enables employers to perform onsite drug testing in about 15 minutes. The Xaliva THC device reader runs an immunoassay, directly detecting the Delta-9 THC metabolite with its proprietary scanning technology showing a positive or negative result on the display screen, objectively determining if the employee has recently consumed cannabis in the last 10 hours. The carefully designed Xaliva THC solution provides an easy method for anyone to collect a saliva sample directly from the employee’s mouth by attaching the enclosed tube to the cartridge and running the test. The process and enclosed disposable products keep the saliva contained in the collection tube and cartridge so there is no mess, spills, or risk of contamination, resulting in a consistently reproducible test that the employer and employee can directly observe at all times.
Executing this process consistently requires clear policy and communication to implement it well. Overall, this hybrid testing approach better balances fairness with safety & risk. To further evaluate your choices, please click the link and read the article Employers are Using Recent Use Cannabis Testing: Balancing a Safe & Fair Workplace.