How is oppositional defiant disorder treated?

Therapy. Individual and family therapy. Individual counseling for your child may help him or her learn to manage anger and express feelings in a healthier way. Family counseling may help improve your communication and relationships, and help members of your family learn how to work together.
Behaviorally. Here is a dvd which will help: http://www.Amazon.Com/s/ref=nb_sb_noss?Url=search-alias%3daps&field-keywords=the+20+minute+behavioral+miracle.
Meds VS Therapy. Behavior therapy would be the most effective one. Some medications such as stimulant or Tenex (guanfacine) are helpful. Consult clinician in the local area.