Sweat Patch Drug Test — Continuous 7–14 Day Monitoring | Glossary

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Sweat Patch Test

A continuous drug monitoring method using a tamper-evident absorbent patch worn on the skin for one to two weeks, then lab-analyzed for drugs excreted in sweat.

Key Facts

A tamper-evident absorbent patch worn on the skin for 7–14 days
Provides continuous monitoring rather than a single point-in-time sample
Detects parent drugs excreted in sweat throughout the wear period
Used in probation, child-welfare, and intensive return-to-duty monitoring

The sweat patch is a bandage-like collection device applied to cleaned skin (typically the upper arm or torso) and worn continuously for 7–14 days. Drugs and metabolites excreted through sweat accumulate in the absorbent pad, and a unique serial number plus tamper-evident design documents integrity for chain-of-custody purposes. Unlike urine or oral fluid — snapshots of a single moment — the patch monitors the entire wear period, eliminating the "schedule around the test" problem. That makes it a tool of choice in criminal-justice supervision, child-welfare cases, and high-accountability return-to-duty monitoring. Limitations include environmental-contamination challenges and a smaller menu of detectable substances than lab urine panels.

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