There is NO sure fire way to do this especially given the time frame that you specified. In fact, attempting to do this with drinks, teas, or pills -- it's just going to be a waste of time, money and worry. In my opinion, since he's the smoker and you aren't, he's got the advantage -- and the right idea. A Whizzinator and/or other methods of subbing will be the ONLY way he will pass.
I'm sorry but the fact that you think this is possible and you're attempting to provide alternatives to a method that is tried and true, well, it is almost laughable. DO NOT try and talk him out of using substitution just to appeal your "honesty" or "helpfulness" or whatever. If he's so worried about keeping his job, he NEEDS to substitute and with all due respect, he doesn't need to be asking you for advice.
geekedupgirl Reviewed by geekedupgirl on . random testing ok, i have this friend (not me i swear) who gets random tests at his place of employment. they are on NO set schedule at ALL. he wants to get this Wizinator thingie, but there has to be an easier way to clean his system out. If he pops on a piss test, his job is OVER, end of story, and the job he has, losing it for drugs would ruin his future. I have tried to get him to just quit smoking for a few years, but he is determined to keep it up. All I can do now is help him as best i can. Rating: 5