Addiction Treatment and Depression

Hi, my father was addicted to gambling. We lost a lot because of his addiction. Later as per the advice of friends and relatives, he got addiction treatment. It was really good.
But another problem started after the addiction treatment; depression. His behaviour has changed completely. Now he is always moody, he lost interest in usual activities, has no appetite and lost weight. He says his mind is filled with guilt and is feeling he is helpless. 
We already consulted our family doctor and tried many antidepressants. But nothing resolved it. When we discussed this again with our doctor, he suggested a good registered psychologist in Toronto. He said that cognitive behavioural therapy has a very good record in treating depression. When I searched on the web, found many CBT success stories. So I just wanna know more about CBT. Please share your experience if you have any.
Category:PersonalStories