<p>An Employee Drug Test is one that screens for alcohol, nicotine or a variety of illegal substances. It is given as either <a href="/resources/glossary/define-on-site-drug-testing">On-Site Employee Drug Test</a> or an <a href="/resources/glossary/define-off-site-drug-testing">Off-Site Employee Drug Test</a> with specimens of urine, saliva, blood, sweat or hair.</p>