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The Global Insight

Do companies do background check before drug test?

Author

Michael Gray

Updated on March 20, 2026

It is not uncommon for employers to conduct both background checks and drug tests before making an offer of employment. In both scenarios, the drug test and the criminal background check occur at the same time as part of the background screening process.

Does an employer have to warn you before a drug test?

How much notice does my workplace have to give me that I will be having a drug test? Your workplace is not required to give you any notice unless your specific employment contract and workplace policies state otherwise.

Can a job still hire you if you fail a drug test?

The federal government requires any company regulated by the Department of Transportation to not hire anyone who fails a drug test for jobs considered “safety-sensitive positions.” When you take a drug test, the employer is the only party authorized to see the results.

Are background checks the same as drug test?

The most common background checks consist of criminal history, education, previous employment verifications, and reference checks. These reports could also include results of pre-employment drug testing.

Can I refuse a random drug test?

Employees may refuse to take a workplace drug test – but they can also be fired for that refusal. An employer only needs to demonstrate they had good reason to believe someone was a safety hazard or was unable to perform their job.

Do failed drug tests go on record?

In many cases where the drug is illegal, or there is no medical reason for using it, employment may be terminated. In addition, failing a DOT drug and alcohol test remains on your record for three years.

Can you fight a positive drug test?

The best way to contest false-positive results is to reach out to your pharmacist and ask if prescription drugs and OTC medications you take on a regular basis can cause a positive drug test result. Ask if the pharmacist can provide written documentation to this effect and bring a copy to the test site.

Will I fail a drug test if I drank the night before?

Since alcohol can stay in your body anywhere from several hours to a few days, the best way to guarantee you’ll pass a drug test is to not use alcohol for about 2 or 3 days before taking a test.

Can a employer let you start work before they get the drug test results?

Can a employer let you start work before they get the drug test results back. Ask a lawyer – it’s free! Yes. Unfortunately they can do that. You should read the employment manual or any other policies that they have asked you to sign to determine what rights you might have is the tests come back negative.

Can a private company screen for drug use?

Most state laws allow private employers to screen job applicants for drug use, provided that they give notice that drug testing is part of the hiring process, use state-certified labs and screen all applicants for the same job. However, state laws may restrict the way testing is carried out.

How to request a retest for a drug test?

Check with the company for information on how to request a retest. Here’s information on how long drugs and alcohol may show up on a drug test: 5 Note that hair drug testing may show results that go back farther than what would show up in blood or urine testing.

Where can I find information on pre employment drug test?

More information on the release of health information can be found by contacting U.S. Department of Health and Human Services, which administers the Health Insurance Portability and Accountability Act (HIPAA). Pre-employment drug screening cannot include testing for alcohol use, according to the Americans with Disabilities Act (ADA) of 1990.