Drugs of Abuse Sweat Patch Technical Questions & Answers

A positive patch cannot show when drug use occurred. If a patch is worn for 7 days, for example, a positive patch result indicates drug use occurred during the patch wear period, or 24-48 hours before patch application, or up to 24 hours prior to the patch removal. How long after use must the patch be worn in order to produce a positive result? ................
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