One thing that might work to destroy a bad habit is to implement the laziness principle. As humans, all of us tend to be lazy most of the time and do what is “easy”. Having a coffee everyday even if you don’t want to is easy because everything is there and it is easy to make. Same goes for the cocaine addiction (most of the time). Try to make it super hard to get your hands on cocaine. Spend more time with your family and maybe even go to therapy and talk about it to a human being that will understand you. Make it so that cocaine is hard to get by different means. Some ideas include giving all your money to your husband so that you need to ask for the money to buy the drugs, don’t drive in a place full of dealers so that you don’t think about having drugs and etc…