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

Substance abuse can compromise the integrity and stability of your workplace. Pre-employment drug testing can help you make confident, informed decisions about current and prospective employees and prevent the hiring of individuals who abuse drugs.
Read more about Pre-Employment

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.

Read more about Random Testing

Variety of employees, white collar and blue collar

OSHA Drug Testing

We provide a full line of drug testing services that can assess exposure to harmful or hazardous substances in accordance with OSHA regulations.

Read More about OSHA Drug Testing

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.

Read More about Reasonable Suspicion Drug Testing

Man in drug testing lab

International Drug Testing

Aiming to simplify drug testing abroad, our team can help navigate challenging hurdles that are frequently present like cultural differences in business etiquette, currency exchange and import/export customs.

Read More about International Drug Testing