Depression is a mood disorder wherein the patient have a pervasive sad mood or loss of interest in most activities for at least 2 weeks.

It can cause significant distress & impairment. It is also a chronic, episodic and relapsing syndrome.

Treatment can either be by psychotherapy alone or pharmacotherapy alone or psychotherapy combined with pharmacological therapy.


  • Patients may not present with depressive mood; somatic complaints may predominate
  • Depression should be suspected in patients who present with physical symptoms (eg fatigue, gastrointestinal distress or back pain) which cannot be explained or in those who present with pain, anxiety or substance abuse
  • Presence of depressed mood or diminished interest or pleasure in activities is essential in diagnosing depression
  • Diagnosis may be easier in patients who are more aware of their moods or functioning
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