About Manchester Comprehensive Treatment Center in Manchester, NH Located in Manchester, New Hampshire, Manchester Comprehensive Treatment Center (CTC) serves adults age 18 and older of all genders who are suffering from an addiction to heroin, morphine, prescription painkillers, or other opioids. We offer medication-assisted treatment (MAT) to help our patients set the groundwork for lasting recovery from opioid addiction. Our patients receive a combination of methadone and both individual and group therapies to help them stop abusing opioids and start functioning at a higher level.