Drug & Alcohol Therapy ​ Lifetime rates of substance abuse/ dependence have been estimated at over 30% for alcohol and over 10% for other drugs. Across a 12 month period approximately 8.5% of the population have an alcohol use disorder, and 2% have a drug use disorder. ​ Physical dependence is sometimes considered indicative of having a ‘problem’ with drugs or alcohol. However, physical dependence is not required for drug and alcohol use to be problematic. Drug and alcohol us