A drugA name for a wide variety of chemical substances capable of altering the function of your mind and body in significant ways. These can include over the counter prescriptions, alcohol, and controlled substances. Most drugs are either physically and/or psychologically habit-forming. More used to treat partial seizures and is one of the most commonly prescribed drugs in the United States. It is also useful in reducing the symptoms of alcohol withdrawalWhen the body gets acclimatized to some habit-forming substances, there can be adverse consequences when they are not consumed regularly. The unpleasant feelings associated with cessation of consumption are notably severe regarding heroin and alcohol. They can even be fatal without the provision of ... More and cravingThe urge to engage in the behavior you are addicted to, particularly when you have not done so for an extended period. These usually occur with greater frequency in the earlier years of recovery. More.