Substitute addictions may become a problem when people who overcome one addiction turn to something else to fill the void. Addiction is a difficult thing to conquer, and when someone has to learn to live and cope without the drugs or alcohol that they have been using as a coping mechanism, they sometimes fall victim to another addiction in the process. A drinker becomes addicted to benzodiazepines. A meth addict becomes an over-eater. A heroin addict becomes an alcoholic. Substitute addictions are challenging and frustrating for friends and family to deal with, and the person who is addicted may not even recognize that they are substituting one addiction for another.