I have a friend who is a former addict, but he has been clean for 13 years. He has recently had to take a hair follicle test for custody of his son. This test was done on pubic hair and showed a positive for cocaine and marijuana. The cocaine level was approximately 300. How long can cocaine and marijuana stay in pubic hair? When he called the clinic to contest this result, they said that they had destroyed all the hair and he would have to take another test. He did take another test at a local hospital. He is worried sick about this and is wondering how the positives could show up when he is not using?

Thanks

If the follicles tested positive he is most likely using again. Our hair, pubic and otherwise, falls out. On a daily basis we lose over 80 hairs per day on our head alone. So, in 13 years he would have a new set of hair compared to the hair he had then.

So, apparently he is using again.