There is a lot of information out there, and with multiple sources for everything it is very easy to get confused. Little error may play a big role as far as passing a drug test is concerned.

-         Hi, how is it going? I have a question for you – I guess you get this one all the time, but I am a little confused. I had a urine test last week, and I just found out that I failed it. Back in a day I used to smoke a lot, but then I stopped, and then started again, but it was only every once in a while, mostly on the weekends. Anyway, when I heard that I had to go do a drug test, I just stopped smoking and was clean for over two weeks by then. I looked it up, and I figured I would be clean by then. I looked up the chart with detection time and everything! It said that light to moderate users should be clean in a matter of a couple weeks. Why did I fail?

-         Well, the chart is not a rule, but more of a guideline. It differs for every person and depends on many more factors than just frequency and intensity of use.

-         It said 48 hours! That is why I thought I should be good.

-         The chart that you looked up – was that for saliva or urine detection time?

-         Oh, there is a difference? I am not sure which one it was.

-         Unfortunately, there is a great difference – in the urine it can be detected for up to eleven weeks, but saliva testing only detects recent usage.

-         Oh, I see! I guess I should have played it safe and used some kind of detox drink, even though I was clean for two weeks…