substance abuse treatment question from a nonabuser?

I’m considering a career in substance abuse education, treatment, and prevention. I have just recently seen an episode on meth addicts and it basically painted a bleak picture for them. Some that are recovering or “rehabilitated” still fight the urges to go back to their habits on a daily basis and my question is this: even in this day and age with drug rehab clinics and focused attention on drug addiction is there really an effective program for those suffering? I don’t know anyone personally who has suffered just curious about this.

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