What should I say to a loved one at a drug intervention?

I was invited to take part in an intervention on wednesday. It is for my best friend. She is addicted to crystal meth. I am wondering if I should be really harsh and completely honest with what I say to her including detail about what she has been doing while on drugs, or should I leave it more generic like “you are killing yourself, I love you, please get help…etc.”

What is the best approach.

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