The treatment for work addiction isn't much different than treatments for other types of addiction--12 step programs, support groups, counseling, and cognitive behavioral therapy are common approaches. There are some support groups and programs specifically for work addiction, like Workaholics Anonymous (http://www.workaholics-anonymous.org). They have a 230 page book called the Workaholics Anonymous Book of Recovery, which I assume outlines a course of treatment for work addiction.
Work addiction is a hard thing to overcome because, like with a food addiction, you can't just stop working completely. You have to learn to balance work and life.
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