How can drug intervention help an addict?

What happens in an intervention and how does this affect the addict? I’ve been hearing about this, but I don’t really know how it goes.

More Meth Drug Addiction Info:

• Catching Up With Buzz Bissinger | Hoops Addict
• Carbohydrate Addict's Diet Plan | 3FC
• Today's TV Addict Top 5: Things You Didn't Know About COMMUNITY …
• Luxury Drug Rehab Has An Addiction Treatment Which Can Make Addict …
• Escape from becoming a drug addict. | Sharp Yourskills