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Do urine, saliva or hair show a therapeutic level of prescription drugs?

April 26, 2017hair level prescription drugs saliva therapeutic urine

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Do urine, saliva or hair show a therapeutic level of prescription drugs?

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No. Only a blood test can determine specific level of a prescribed drug in the blood. Q. What is the difference between a breathalyzer and urine test for alcohol. A Breathalyzer gives current level of alcohol use. Laboratory screens show use prior to 6 hours before the test and do not give levels of use.