Will I pass a urine test for THC if people smoke around me?

The second-hand-smoke issue for positive drug tests is controversial and remains unresolved. My opinion is there is not enough THC in exhaled air in a room to trigger a positive test, and you have to actually "inhale," but I have colleagues who disagree.

-- Buy a drug store test to set your mind at ease. They are reasonably priced these days -- about US $20-30, and use the same (low) level of technology as the pre-emp drug tests, so if you pass one, you'll pass the other IMO.

-- If you have a co-operative room mate, tell her about your impending drug test and ask not smoke around you for a few days before the test. Every little bit helps.

--All the flushes, juices, herbs, etc are all attempts by mfr's who make the stuff to cynically exploit desperate young people who don't know better. THC sequesters to body fat, and even very slim people who brag about their low body fat and how they won't flunk a drug test are fooling themselves -- everyone has more than enough body fat to sequester THC. You can't "flush" THC out of your system. You only have the drug degradation curve over time as your friend, so use it.

Source: I am a pharmacist

Your test can still show up positive even though you smoked a month ago. I have seen it show up after 90 days on someone. You won't test positive from second hand smoke, but you will test positive if you smoke it yourself.

Do a test to make sure, water helps somewhat.