Reasons for Drug Testing

Drug testing lab group of 5

We perform millions of drug tests annually and offer our clients a comprehensive range of laboratory, instant and on-site drug tests, services and programs. Common reasons for drug testing include pre-employment, random, reasonable suspicion, post-accident, return-to-duty and follow-up testing.

Furthermore, companies and organizations perform specialized drug tests on athletes or employees at risk for steroid abuse and employees in Occupational Safety & Health Administration (OSHA) roles.

Quest Diagnostics employee working in the toxicology laboratory

Pre-Employment Drug Testing

Pre-employment drug testing can help you make confident, informed decisions about current employees and prevent the hiring of individuals who abuse drugs.
Read more about Pre-Employment Drug Testing

Woman at computer in front of computer with random drug testing screen

Random Drug Testing

Random drug testing lets an employer select, using a random selection process, one or more individuals from all of the employees included in the employer’s workplace drug testing pool to drug test.

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Secure collection bag for urine drug test

Post-Accident Drug Testing

As its name indicates, post-accident, sometimes referred to as “post-incident,” drug testing is performed after an employee has been involved in a workplace accident.

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Woman working in our drug testing lab

Reasonable Suspicion Drug Testing

Reasonable suspicion drug testing determinations are sometimes the most challenging aspects of a drug-free workplace program, yet can have a profound impact on safety, well-being and productivity.

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Man offering urine drug test cup to donor

Return-to-Duty Drug Testing

Return-to-duty drug testing is for employees who have previously tested positive for illicit substances or violated a company’s drug and alcohol policy. 

Read More about Return-to-Duty Drug Testing