A 19-year-old male asked:
they smoked weed about 3 weeks ago for the first time and about through up after one hit and they have a hair drug test next week will he pass?
2 doctor answers • 2 doctors weighed in
Dr. Ed Friedlander answered
Pathology 44 years experience
Good: It's unlikely that one use will show up three weeks later. If it does, it will be at a low level and you can say it's secondhand smoke. This is not the place to argue the wisdom of the cannabis laws or screening for its use. I simply hope that under the present conditions, you'll obey the law, and also not use a more dangerous intoxicant simply because it clears the body faster.
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1 comment
Dr. Ed Friedlander commented
Pathology 44 years experience
Provided original answer
On re-reading noticed it's a hair test. This is insensitive and I would be very surprised if it detected a single use. Second-hand smoke might still be a defense. Good luck.
Apr 12, 2013
Dr. Donald Alves answered
Emergency Medicine 24 years experience
If really ONE time..: ...Probably yes. Hair looks for longer term use over longer time. So may survive the test. Best to avoid drugs altogether.
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Similar questions
A 37-year-old member asked:
How does drug testing using hair work?
1 doctor answer • 2 doctors weighed in
Dr. Dan Fisher answered
Internal Medicine 27 years experience
Hair tells all.: Drugs and their metabolites are incorporated into your hair as it grows out. Simple chemical analysis can identify residues and reconstruct your history of ingestion.
5748 views
A 46-year-old member asked:
How does drug testing using hair works?
1 doctor answer • 3 doctors weighed in
Dr. Dan Fisher answered
Internal Medicine 27 years experience
Hair tells all.: Drugs and their metabolites are incorporated into your hair as it grows out. Simple chemical analysis can identify residues and reconstruct your history of ingestion.
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Owensboro, KY
A 31-year-old female asked:
If I smoked pot in the last 6 months will I pass a hair drug test?
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Dr. Stuart Wasser answered
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Depends: How long is your hair? Any hair that was there six months ago will be positive.
5600 views
A 25-year-old male asked:
I have a hair drug test coming up and smoked about a month ago. Only alittle bit will the concintration be enough to show up?
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Dr. Pamela Pappas answered
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Hair test: Marijuana (thc) can be detectable in hair for 90 days.
5378 views
A 19-year-old male asked:
He took two small hits a weed three weeks ago and it was his first time smoking it. Will he pass a hair drug test?
1 doctor answer • 1 doctor weighed in
Dr. Robert Killian answered
General Practice 28 years experience
Hair Tests: Nope. He will fail it. Any drugs used since his last full thickness hair cut will test positive.
5162 views
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Last updated Oct 20, 2016
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