In the past 20 years, doctors have reversed the meaning of these words. Habituation now refers to using a drug that causes physical withdrawal symptoms. Addiction has become a term that refers to compulsive behavior that continues in spite of adverse consequences. | In the past 20 years, doctors have reversed the meaning of these words. Habituation now refers to using a drug that causes physical withdrawal symptoms. Addiction has become a term that refers to compulsive behavior that continues in spite of adverse consequences. |