Sooner, kind of pushy for someone who is probably under 18.

You've posted this very simple question about 3 days ago and it looks like you've done no research on your own whatsoever. There's a search feature and what you've asked has been answered time and time again. Use the advanced search for posts from me even and you want have to keep asking.

We like to help people around here but instead of spoonfeeding the answers, we like people to be more proactive so they can learn more about drug testing and how to beat them.