I searched around the forum and haven't found satisfactory answers to this, so i'd like some answers from knowledgable people. I'm going to be a chemical engineer and may have a job interview at Dow Chemical next week. What type of drug test will I be facing? The only thing i'm worried about is marijuana, which i've used alot of over the summer. I smoked pretty much every day, up until sunday, so I might have enough time to get toxins out of my system, but I would rather be safe than sorry. I found a product called "urine luck", and from what I read it seems to work. Anyone have any comments on this? I found a source that sells it for $18, so it's pretty cheap considering it might land me a job where i'll potentially make thousands (and maybe hundreds of thousands if they keep me on after i graduate in May). I've read about this "urine luck" product and it says it will help me pass a drug TEST, but not a drug screening. What exactly is the difference? and what will I be up against? Is a screening where they simply test for similar substances using a test strip prior to shipping your sample out, and don't they need to reconfirm these results using a real test before a positive can be identified? Any help and information you can give me will be appreciated. This is my first run in with any type of drug testing.