Addiction used to refer only to physical and psychological dependence on psychoactive substances such as alcohol, tobacco, heroin and other drugs which cross the blood-brain barrier once ingested, temporarily altering the chemical milieu of the brain.
However it now includes a continued involvement with a substance or activity, despite the negative consequences associated with it. Pleasure and enjoyment would have originally been sought, however over a period of time involvement with the substance or activity is needed to feel normal.
Some psychology professionals and many laymen now mean 'addiction' to include abnormal psychological dependency on such things as gambling, food, sex, pornography, computers, internet, work, exercise, idolising, watching TV, spiritual obsession, cutting and shopping.
EFT can greatly add benefit to whatever treatment method is sought, and in many cases be used as the sole method. Addiction is something one must really want to do regardless of the method or type of addiction. Obviously with varying types of addiction, psychological, physical, or behavioural, the process may be lengthy. But, EFT can certainly ease the emotional burden, the stress, the guilt, of working through the eradication of the the addiction, making the transition easier.