Located in Harrisburg, Pennsylvania, Harrisburg Comprehensive Treatment Center (CTC) provides medication-assisted treatment (MAT) services for adults who are battling addictions to prescription painkillers, heroin, and other opioids. If you meet the following criteria, you may benefit from seeking care at Harrisburg CTC methadone clinic: You are age 18 or older You are currently in a state of withdrawal and have not used substances in the past 20 hours You have been opioid-dependent for at least one year