Thanks for all the feedback and information, it is greatly appreciated.

Unfortunately I think it is in an open room with the person there with me during the test. I have though about the sub method but I do not feel that confident in doing so.

If I continue taking these Niacin pills for the next couple days and try one of the detox cleaners from the smoke shop the day of the test will the odds be in favor of me not passing?

Can anyone recommend me the best possible detox cleanser to try?

Thanks.