"prescribed 100mg every six to eight hours for lower back muscular pain.  relieves symptoms and along with pt has provided relief.  i only take it when the pain flares up.  there was an initial instance or two of psychedelic like effects the first two or three times i took nucynta and went to bed.  seem to sleep okay after taking nucynta now.  provides much better relief than oxycodone did.  have experienced some tiredness while taking."