Answering my own question, and to anyone else out there wondering, i read on a website that sold Strip NC that it works within 30 minutes and lasts up to 8 hours. So, the answer is taking it on the day of the test, probably at least and hour before, or i will probably take it two hours. I have an interview tomorrow and they said they will do a pre-employment drug screen. If i take a drug test, it probably wont be until next week. I am still abstaining from smoking. If anyone has any suggestions on any other ways to pass (I have read so much on the web that i dont know what to do), PLEASE help me, I really need this job. thanks all.