Detox Drinks... Do They Work?

Hey Ents,

First time posting, but I was wondering if anyone had any experience with detox drinks to pass a drug test. I was asked to take a drug test randomly at work today, the last time I smoked was last night, and I smoke daily. I rushed out to the nearest head shop and picked up some Detoxify Brand Green Clean herbal cleanser, drank it according to the instructions along with lots of water and took my test about 2 hours later.

I have always been suspicious about these products, but I needed to try something to piss clean. Basically I want to know if anyone has used this product or similar products and had success. I'll find out what the results were next week, but I'm hoping somebody can weigh in and help me calm down. Burn one for me tonight, Ents.