Usually, when you get hired for a job, a background check is done on you. You may have to undergo a criminal or professional background check but some other testing that might come up — drug testing — may seem a bit excessive for the work you're applying to. It's not invasive, and sometimes drug testing is entirely necessary for the safety of yourself or others.

Here are reasons why you may get drug testing done as part of your employment.

You're applying for a job where drugs are present

Any job where you may be working around any type of medications or drugs, such as a doctor's office, pharmacy, vet clinic, or health clinic, you may be subject to drug testing as part of your employment. You won't be surprised by the drug testing as you will be notified that the tests are part of employment and can be done at random or regularly. These tests are often done prior to being hired as part of your job and you can decline if you want, but you may not get the job.

You're involved in a work-related accident

A work-related accident that leads to an accident report and/or the need for workers' compensation may lead to a drug screening. Your employer will want to know you are not under the influence of drugs or alcohol as part of your accident, and drug testing is just a legal protocol. Your employer is protecting you and their business by having a drug screening done as part of your workers' compensation claim.

You're applying for a new job

The reality is this: any employer can demand drug testing if they disclose they can do this as part of your employment and often, this type of testing is done as part of the employment process. If you take any prescribed medications that may be flagged in drug testing, let your employer know. Workplace physicals may be required as part of your employment as well, which can be done in addition to drug testing.

Most drug testing and other screenings or exams will be done in a clinical office. You can be reimbursed for your screenings once you pass or are hired on by a company, but in many cases, the company will pay for the drug testing so you don't have to. If you have questions or concerns about your working rights before taking a drug test, check with your local human resources department.