A member asked:

Do all drugs last in your hair for 90 days... i take klonopin for anxiety and worried if my job does a hair test.

A doctor has provided 1 answer
Dr. Paul Williams answered

Specializes in Family Medicine

Hair drug test: The ONLY type of drug test permitted under federally regulated programs is a urine drug test and its tested for 5 major drug classes - opiates, PCP, THC, cocaine and amphetamines. see https://www.samhsa.gov/workplace/resources/drug-testing IF you take prescribed medications - get a letter from doctor and take your prescription with you. Drugs in hair can be detected for a long time.

Answered 3/23/2017

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