More than 23 million people in the . age 12 or over need treatment for substance abuse. Unfortunately, only about 10% of this population receives treatment. About 30% of people in substance-abuse treatment facilities are under the age of 30. Successful treatment for addiction often includes a combination of behavioral and pharmacological interventions. Treatment works best when tailored to the individual's unique substance problem and situation. Detoxification ("detox") is the first step in addiction treatment. Certain medications may be used to ease the process and reduce withdrawal symptoms.