A 19-year-old female asked:
Disclaimer

my cousin smoked weed 52-53 days ago. she only did it once. will it show up in a urine test?

2 doctor answers
Dr. Ed Friedlander
43 years experience Pathology
No: In the unlikely event that it does, it will be at a low concentration and she can claim that it was passive exposure. This isn't the place to debate the cannabis laws. Best wishes.
Answered on Dec 30, 2015
Dr. Gerardo Guerra Bonilla
11 years experience Family Medicine
Marijuana: Urine drug testing for cannabinoids is widely available and inexpensive. A positive test only establishes past use and cannot be used to diagnose intoxication or a cannabis use disorder. Urine tests for cannabinoids remain positive after discontinuation of cannabis for up to 7 to 10 days in a casual cannabis user, 2 to 4 weeks in a heavy user, and months in a chronic heavy user.
Answered on Dec 13, 2015

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Personalized answers
Free
Talk to a doctor
Unlimited visits
$10/month

Related questions:

A 18-year-old female asked:
Dr. Ed Friedlander
43 years experience Pathology
Probably not: Cannabis does stay around much longer than drugs that are much more dangerous, which is unfortunate. If you are an infrequent user, you might tell the ... Read More
A 27-year-old female asked:
Dr. Alok Agrawal
33 years experience Nephrology and Dialysis
No: No, but don't smoke. Healthy lifestyle can prevent lots of problems.
A 24-year-old male asked:
Dr. Pamela Pappas
41 years experience Psychiatry
It depends: It depends on how frequently you were using before the 16 days. If you used regularly before that, then yes your drug test could be positive.
A 24-year-old male asked:
Dr. Robert Killian
27 years experience General Practice
Marijuana and UAs: Yes. Very likely. Marijuana can hang in the fat cells in your body for a long time. Sixteen days may not have been enough time to clear this fully.

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Personalized answers
Free
Talk to a doctor
Unlimited visits
$10/month