ORIGINAL ARTICLE Malaysian Journal of Medicine and Health Sciences (eISSN 2636-9346) Long-Term Effects of Kratom (Mitragyna speciosa) Use Darshan Singh1, Suresh Narayanan2, Oliver Grundmann3, Nelson Jeng Yeou Chear1, Vikneswaran Murugaiyah4, Shahrul Bariyah Sahul Hamid5, Nur Sabrina Mohd Yusof1, Eshal Bin Dzulkapli1, Vicknasingam Balasingam1 1  Centre for Drug Research, Universiti...