medications containing opioids. That's exactly what you need—Tapaday 200. Sometimes people refer to opioids as "narcotics." Medical professionals recommend Tapaday 200 to treat moderate-to-severe pain. Nucynta ER, also known as Tapaday 200 extended-release formulation, is given to treat persistent pain that has not responded to previous medication treatments. Extended-release tapentadol shouldn't be used as required to relieve pain.