Methods and compositions for the prevention of opiate tolerance using mitragynine. by Fakurazi, Sharida, Baharuldin, Mohamad Taufik Hidayat, Mohd Moklas, Mohamad Aris, Ithnin, Hairuszah, Abd Rahman, Shamima

“…The present invention relates to methods and compositions to counter the side effects of analgesic treatments with opioids such as morphine. …”