A molecule consisting of a nitrogen-containing base (adenine, guanine, thymine, or cytosine in DNA; adenine, guanine, uracil, or cytosine in RNA), a phosphate group, and a sugar (deoxyribose in DNA; ribose in RNA). DNA and RNA are polymers comprised of many nucleotides, strung together like beads in a necklace. or A drug used to treat moderate to severe pain. It binds to opioid receptors and other molecules in the central nervous system. Nucynta is a type of opioid and a type of analgesic agent. Also called tapentadol hydrochloride.