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Drug screening
Carisoprodol is not detected on routine drug screening. If there is a query as to whether the person is using the medication, then specific drug screening tests using blood and urine specimens will need to be performed.
If a patient tests positive for narcotic medications, and this is due to recreational use of the drugs, then the mentioned specific tests may pick up the presence of carisoprodol in the patient.

It's important to mention though that the presence of carisoprodol alone in a specific drug screening test will not trigger any further legal action unless the medication hasn't been prescribed and it is discovered in the presence of a narcotic medication that has also not been prescribed by a registered doctor with a DEA number.