About Lawrence CTC Methadone Clinic in Lawrence, MA Located in Lawrence, Massachusetts, Lawrence Comprehensive Treatment Center (CTC) provides medication-assisted treatment (MAT) to adults age 18 and older of all genders who are struggling with opioid use disorder. Many methadone clinics offer just one type of medication to people who are receiving treatment for opioid addiction, but our Lawrence center provides both methadone and Suboxone. Consistent research over a period of decades has shown that MAT gives people a better chance to safely and effectively stop their opioid use and reduce their risk of relapse.