Conversation so far:
where can you get a drug test done
The most common method of drug testing, urinalysis, can be done at the workplace (at a health unit), a doctor's office or any other site selected by the employer.
What is the purpose of the drug test
Drug testing requested by employers is to determine if employees or job applicants are using drugs. It can identify evidence of recent use of alcohol, prescription drugs and illicit drugs.
Why are the results of the drug test important to employers
Alcohol and drug abuse creates safety and health hazards decreasing productivity, generating poor employee morale, leading to higher costs of health care claims and short-term disability claims for employers.
Who sees the results of the drug test
The result of a drug test is personal health information. There are restrictions on sharing the information with others. Employees sign a release for their employer to receive the results.

Question: What methods are used to test
Self-contained rewrite: What methods are used to drug test employees