If you are referring to the Urineluck additive, it will not work if youre taking an instant-type test because it takes 90 min to fully destroy the drug metabolites in the urine sample. In addition, additives are being detected on a more frequent basis than ever before. The sample is ruled "adulterated" for unacceptable levels of nitrites, chromates, and/or pH.

The Quick Fix synthetic urine would be a much better bet. Spectrum Labs (the makers of both the QF and the Urineluck additive) can exchange the additive for the QF for you since they are both the same price. Contact info can be found on the Urineluck website.

If youre brave enough to sneak in something, then sneak in something thats gonna work - the QF, or even a clean persons sample.