How to tell a friend she’s doing too many drugs?

Question by spots: How to tell a friend she’s doing too many drugs?
My friend is wayy to into into drugs and drinking and smoking. she’s really sensitive, but all of our mutual friends agree. any tips on how to hold a successful “intervention?”

Best answer:

Answer by Jan
make her pee in a cup. For testing.

Know better? Leave your own answer in the comments!