what is a 4 panel drug test

A 4-panel drug test is a type of drug screening procedure that is used to detect the presence of drug metabolites in the body. The test involves collecting a urine sample, which is then scanned for the presence of specific drugs. The specific drugs that are tested for can vary depending on the employers policies and the culture of the organization. However, a typical 4-panel drug test may screen for THC, opiates, cocaine, and PCP. In some cases, a 4-panel drug test may eliminate marijuana as a tested substance. The test is laboratory-based and includes a routine screen for each drug class, as well as any necessary confirmation testing.