TY - JOUR KW - Adult KW - Analgesics, Opioid/adverse effects KW - Chromatography, High Pressure Liquid KW - Cross-Sectional Studies KW - Drug Users/statistics & numerical data KW - Female KW - Humans KW - Malaysia KW - Male KW - Mitragyna/chemistry KW - Opiate Substitution Treatment/methods KW - Opioid-Related Disorders/drug therapy KW - Plant Leaves/chemistry KW - Plant Preparations/analysis/therapeutic use KW - Rural Population/statistics & numerical data KW - Secologanin Tryptamine Alkaloids/analysis KW - Substance Withdrawal Syndrome/drug therapy KW - Tandem Mass Spectrometry KW - kratom KW - Mitragynine KW - Opioid poly-drug users AU - D. Singh AU - N. J. Yeou Chear AU - S. Narayanan AU - F. Leon AU - A. Sharma AU - C. R. McCurdy AU - B. A. Avery AU - V. Balasingam A1 - AD - Centre for Drug Research, Universiti Sains Malaysia, 11800, Minden, Penang, Malaysia. Electronic address: darshan@usm.my.; Centre for Drug Research, Universiti Sains Malaysia, 11800, Minden, Penang, Malaysia.; School of Social Sciences, Universiti Sains Malaysia, 11800, Minden, Penang, Malaysia.; Department of Medicinal Chemistry, College of Pharmacy, University of Florida, Gainesville, FL, 32610, USA.; Department of Pharmaceutics, College of Pharmacy, University of Florida, Gainesville, FL, 32610, USA.; Department of Medicinal Chemistry, College of Pharmacy, University of Florida, Gainesville, FL, 32610, USA.; Department of Pharmaceutics, College of Pharmacy, University of Florida, Gainesville, FL, 32610, USA.; Centre for Drug Research, Universiti Sains Malaysia, 11800, Minden, Penang, Malaysia. BT - Journal of ethnopharmacology C5 - Opioids & Substance Use; Healthcare Disparities CY - Ireland DO - 10.1016/j.jep.2019.112462 JF - Journal of ethnopharmacology LA - eng M1 - Journal Article PB - Elsevier B.V PP - Ireland PY - 2020 SN - 1872-7573; 0378-8741 SP - 112462 T1 - Patterns and reasons for kratom (Mitragyna speciosa) use among current and former opioid poly-drug users T2 - Journal of ethnopharmacology TI - Patterns and reasons for kratom (Mitragyna speciosa) use among current and former opioid poly-drug users U1 - Opioids & Substance Use; Healthcare Disparities U2 - 31816368 U3 - 10.1016/j.jep.2019.112462 VL - 249 VO - 1872-7573; 0378-8741 Y1 - 2020 Y2 - Mar 1 ER -