M.A. I believe that both cocaine and crack are equally as bad,but crack may be stronger and more
concentrated. I've never done drugs,but I've known
people who did,and it always led to disaster.Since you are in La,and she's in Mo. there's enough geography to keep you from accidentally enabling her.
When all is said and done,it is up to her to rise or fall on her own merits. Just keep being an example to her,and hammering home what you tell her about meetings,de-tox,changing her life,etc.
Is your friemd married? Have kids,or any family who can do an intervention and force things to a head ? Just keep reciting the Serenity prayer and know you're doing all you can!