Insomnia in young male - what do you suggest

27yrs old male sleeps less than half hour in night and remain awake whole day with tiredness.He goes to job regularly still.Psychiatrist has put him on clonazepam,diazepam,alprazolam,flunarezine,etc over 6 months after he made a diagnosis of anxiety disorder. Still there is no improvement.

I request suggestions from doctors. Rds Dr.prabhu