He assisted me with resisting drug cravings, and I now am no longer burdened by compulsive drug use. Thanks to @darkestknight, I got the idea to ask for assistance from reading an old post he made about interviewing him. Based on what King Paralda said, I think he could assist with reducing all manner of bad habits, not just drug use.
I asked him to effect the change after working closely with his people, and noticing that heavy drug use was hampering my enjoyment of their workings. And no doubt working heavily with the sylphs also helped me break out of these negative patterns of behavior.