An Essential Medicine and Drug of Abuse: Prevalence and Pharmacology of Methadone Posted on January 4, 2022September 21, 2022 By Becky Carter Katherine Bollinger & Svante Vikingsson Drug Testing Matters, National Laboratory Certification Program; 2021 PrevalencePhamacologyMethadone_Bollinger_DrugTestingMatters_2021Download Seized Drugs/Controlled Substances, Toxicology