Drug test

**Drug test**
A drug test is a procedure used to detect the presence of illegal or prescription substances in a person’s body. It is commonly employed by employers, law enforcement, medical professionals, and rehabilitation centers to ensure safety, compliance, and health. Drug tests can analyze samples such as urine, blood, saliva, hair, or sweat and are designed to identify substances like narcotics, stimulants, and other controlled drugs. Understanding the purpose and types of drug tests can help individuals stay informed about legal and workplace requirements.