The defendant first goes to a testing center where a worker affixes the patch to the defendant's shoulder. Normally, a drug-test patch is worn for a week or more. How Long Do You Have to Wear a Drug-Test Patch? So when a drug-test patch is removed, it should contain samples of all the drugs the person took and sweated out while wearing the patch. If there are drugs in the person's sweat, the patch absorbs those as well. The inner part of the patch that contacts the person's skin has an absorbent pad that soaks up perspiration. It will then be several more days before the person's sweat will be clear of the drug.Ī drug-test patch adheres to a person's skin like a Band-Aid. Typically, traces of a drug will start to appear in sweat within a day or so of when a person uses. When a person takes drugs, a small amount will eventually come out in the person's sweat. Some law enforcement agencies are now using drug-test patches as an alternative to more traditional methods like blood, urine, and hair-follicle testing. And there are lots of ways to detect drug use. Drug testing is an important component of the criminal justice system.
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January 2023
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