[_Lisa_]

I have several drug-addicted friends & the first thing you've got to realize is that you can't help them unless they help themselves first. And please don't think that you can do this on your own. You should support them by encouraging them to enroll in a rehab center. And you can offer an open ear & shoulder during their rehab process but they need professional help.

Edited to include that they need to get away from their friends that are using. Take it from someone who has been there, your friend will NEVER stop using drugs unless they aren't in the atmosphere anymore. By being willing to help them you might possibly be taking the risk that you will be that person's only friend for God knows how long. They may need you in the middle of the night when they miss staying up w/ their buddies to snort cocaine, they may need you in the morning when they can't get to sleep because they are shaking from the lack of drugs in their system. Its a full-time job being the friend of someone who is trying to quit drugs.