About Southern Indiana Comprehensive Treatment Center in Charlestown, IN Southern Indiana Comprehensive Treatment Center (CTC), located in Charlestown, Indiana, provides medication-assisted treatment (MAT) to adults age 18 and older of all genders who are struggling with opioid use disorder, the clinical term for opioid addiction. Years of research has shown that MAT promotes better recovery outcomes for people who are suffering from addictions to morphine, prescription painkillers, heroin, and other opioids. Although most methadone clinics are associated with just one type of medication, Southern Indiana Comprehensive Treatment Center offers multiple options to our patients, including methadone, buprenorphine, naltrexone, and Suboxone.