Cool How Long Does Hair Follicle Drug Test Go 2023. Cocaine detection time in hair the drug detection time refers to the amount of time a drug. Web many times, it can take between five and seven days for substances to be detectable on a hair follicle drug test.

Web medically reviewed on 11/17/2021 disease and condition: Second, they can look further back into a person’s history. If a longer piece of hair is selected, the drug test results can.