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Dr. Mark
Dr. Mark, Doctor (MD)
Category: Health
Satisfied Customers: 11946
Experience:  U.S. Physician/Surgeon in Neurosurgery
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How much pot does it take to show up in a urine test

Resolved Question:

how much pot does it take to show up in a urine test
Submitted: 8 years ago.
Category: Health
Expert:  Dr. Mark replied 8 years ago.
It really depends on if you smoke occasionally (once every once in a while, or daily, or are a really heavy user - multiple uses over weeks).

How often do you use marijuana?
Customer: replied 8 years ago.

this was inhaled from second hand smoke in an open area(outside) i do not use at all, was around a single person who was smoking it


Expert:  Dr. Mark replied 8 years ago.
Second hand smoke should not be enough to elicit a positive response from a urine drug test for marijuana.

This has been shown in medical studies -- second hand smoke was not in high enough concentration in the blood to make a positive test.

He would have really had to inhale the smoke for it to be positive for about 3 days after the exposure.
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