Yea, Did you drink a lot of water? I'm not in no way saying this works or telling anyone to try it cause many ppl say that it doesn't work, but I had a friend who smoke everyday for almost a year and half and he had to go get tested. He drank almost half a bottle of vinegar two days before he had to take the test and stopped smoking three days before he had to take it. Somehow he passed. I'm not saying it was the vinegar tho. It could have just been a false negative, but ever since then its had me wandering.