Category: Ask the Experts
Marijuana drug testing changes in California and Washington: How the new laws affect employers
Employers in California and Washington face important decisions on marijuana drug testing based on new laws which went into effect in 2024.
Expiring Federal Drug Testing CCF
Prepare now for the expiration of the old Federal CCF. Using old forms after this date may cause significant delays.
Ask the Experts: Drug testing cutoffs
Employers should carefully select a drug test specimen type and cutoff level based on the desired window of detection and regulatory requirements.
Ask the Experts: Hair drug test collections
The amount of hair needed for a hair drug test is approximately 100 milligrams made up of the first 1-½ inches from the root end. The hair is typically cut from the crown of the back of the head in a manner where it will not be as noticeable. Learn more about hair drug test collections.
Ask the experts: Secondhand marijuana smoke
Can you fail a drug test from secondhand smoke? There are no published, peer-reviewed studies to date that indicate someone would test positive on a drug test due to incidental exposure of marijuana smoke. Learn more from Dr. Barry Sample, Quest Diagnostics.
Ask the experts: Hair testing vs. hair follicle testing
What is the difference between hair drug testing and hair follicle drug testing? We asked a Quest expert to explain.
Ask the experts: Effects of hair treatments on drug test results
Our scientific expert, Dr. Barry Sample, answers the question: Can products and treatments affect hair drug test results?
Ask the experts: The life of a drug testing specimen
Our labs handle more than eight million drug testing specimens yearly while maintaining an excellent track record of reliability and accuracy.
COVID-19 and the global impact on the drug market
New research from the United Nations Office on Drugs and Crime (UNODC) examines drug production and raw materials, drug trafficking amongst border restrictions, and individual drug consumption while quarantined.
Ask the experts: Is an oral fluid drug test safe?
During the novel coronavirus health crisis, many employers ask is if an oral fluid drug test is safe in the current circumstances. Under rigorous safety procedures, drug testing continues across the country.
