The hotel heiress--whose close pal and The Simple Life co-star Nicole Richie underwent a high-profile battle with heroin--detests being in the company of Hollywood drug abusers, particularly when she's forced to witness the physical damage narcotics inflicts on users' appearances.
Another reason Hilton won't touch illegal substances is because she's had first hand experience of the fatal consequences of taking hard drugs.
She says, "I don't like those kind of people (drug users). I've seen a lot of bad things happen and I've lost a lot of friends, like my friends' older siblings overdosing in Hollywood.
"I've seen girls out now who've been doing it for so long they look haggard and old. I like my young face. I don't want to look old."
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