About Woonsocket CTC Methadone Clinic in Woonsocket, RI Located in Woonsocket, Rhode Island, Woonsocket Comprehensive Treatment Center (CTC) offers opioid addiction treatment services to adults age 18 and older of all genders. Our team of dedicated professionals includes physicians, nurses, and counselors who are well-versed in treating opioid addiction. We use medication-assisted treatment (MAT) to help people move from addiction to recovery. MAT is an approach frequently used in methadone clinics, combining the use of medications and counseling to holistically address opioid addiction.