Tapaday 200mg contains Tapentadol which is used to treat moderate to severe acute pain (pain that appears quickly, has a defined reason, and is expected to go away if the underlying cause of the pain is treated). Tapentadol extended-release tablets are used to treat diabetics with severe neuropathic pain (pain caused by nerve damage). Tapentadol extended-release tablets are only prescribed for those who are expected to require medicine 24 hours a day to manage pain that cannot be controlled with other pain drugs. Tapentadol belongs to the class of drugs known as opiate (narcotic) analgesics. It works by altering how the brain and nerve system react to pain.