ok, so how long does 2nd hand smoke (pot) stay in system & does it show up on a drug test?

Answer 1

Researchers studied prisoners and classified them as either occasional (once a week) or frequent (more than once a week) users.

In the infrequent users, the half-life of marijuana was 1.3 days. That means it took 1.3 days for the amount of marijuana in their blood or urine to go down 50 percent.

For frequent users, the half-life was one to 10 days.

Then researchers continued to collect up to five urine samples per day until the urine test was negative for marijuana.

For infrequent users, the time from the last reported drug use until the last positive specimen was five to 12 days. Frequent users took 22 to 27 days to clear their systems.

Answer 2

Speaking from personal experience, second hand pot smoke should not show on a drug screen unless for some reason the test is extremley sesitive. It only takes a month to cleanse your system if you are a heavy smoker. I know too many people who have done so.

Answer 3

if indeed you inhale enough to register on a test, pot has a 'half life' of 28 days. That means that it takes 28 days for your body to metabolize just half of whats in your system, another 28 days for half of the remaining half, and another 28 days for half of that , and so on. Pot stays in the system a very. very long time.

Answer 4

at least 28 days for blood/urine tests. it will be in your hair longer. that's why smart companies ask for hair samples to test. you get a picture of long term exposure depending on hair length