I used it before and it didn't work BUT I bought the one pill not the liquid. I took it - and yes there are no directions! - drank alot of water and waited a couple houre - and then failed the test!! However - I was told afterward that it is that think liquid stuff that actually works. I use zydot and it has worked several times.....but I have read that NC strip is good too. Just don't do the pill! Good luck.......and keep abstaining. (I am in the same boat - here's to getting through!)