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Dr. Andrew Rynne
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Dr. Andrew Rynne

Family Physician

Exp 50 years

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Can Using Cocaine And MDMA Affect Hair Follicle Test If The Hair Is Newly Grown?

Hello, I have a hair follicle test coming up in about 2 months. I have used cocaine about two times and MDMA once in June. I have cut my hair so only clean hair will grow (.5in/month). I have researched some and found that if drug use was infrequent it would be below the cutoff detection level during a hair follicle drug test. Would it be possible to pass in 2 months with about an inch of clean growth?
posted on Mon, 6 Jul 2015
Twitter Thu, 30 Jul 2020 Answered on
Twitter Mon, 3 Aug 2020 Last reviewed on
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Addiction Medicine Specialist,  's  Response
Hi,

Okay, it is able to be deposited into the hair from the blood. At worst there is a 5 day window after taking something for it to go into the hair, and that is at the very base and likely below skin level so... maybe 10 days after. THEN, it isn't there. maybe a light trim? BUT with infrequent use, the sensitivity isn't like urine.

Take care. Hope I have answered your question. Let me know if I can assist you further.

Regards,
Dr. Matt Wachsman, Addiction Medicine Specialist
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Can Using Cocaine And MDMA Affect Hair Follicle Test If The Hair Is Newly Grown?

Hi, Okay, it is able to be deposited into the hair from the blood. At worst there is a 5 day window after taking something for it to go into the hair, and that is at the very base and likely below skin level so... maybe 10 days after. THEN, it isn t there. maybe a light trim? BUT with infrequent use, the sensitivity isn t like urine. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Matt Wachsman, Addiction Medicine Specialist