Aspadol 150mg tablet is essentially an analgesic drug, an opioid pain medicine, that acts as a two-way drug, due to its dual mechanism of action: as a norepinephrine reuptake inhibitor (NRI), as well as an agonist of mu-opioid. Aspadol Tablet is a medicine used to treat moderate to severe acute pain in adults. Nausea, drowsiness, vomiting and dizziness are some of the side effects of this medicine.