Aspadol 100mg ( tapentadol) tablet is essentially an analgesic drug, an opioid pain medicine, that acts as a two-way drug, i.e with its dual mechanism of action: as a norepinephrine reuptake inhibitor (NRI), as well as an agonist of mu-opioid receptor. It is not considered a pro-drug, and thus, doesn't rely on metabolism for producing its therapeutic effects on the body. Aspadol drug is known as a moderately-strong opioid, used for treating moderate to severe pain.