EFT can be used for addictions. The theory is (and I find this useful) that any addiction is actually us trying to self-medicate against an anxiety or its a way to repress our feelings.
If you can define and deal with (using EFT) the anxiety, the urge for the addictive substance is reduces substantially, then it's just a habit to change. Which can also be done with EFT. All this can be done aby a skilled EFT practitioner. You can find a list of them here:
Referrals to EFT Practitioners.
Usually I'll describe better how to do EFT, but since I don't know your addiction or situation, I reckon you'r ebetter off dealing with someone in person who you can talk to...
Good luck
Joy to you
Hazel