Medical Definition for Depression

Feeling sad is a normal part of life, but sadness can be constant in depression and affect your life in many ways. If you sleep most of the day, avoid friends, are irritable and withdraw from once-enjoyable activities, you might be suffering from depression.

Definition

• According to the DSM-IV, the American Psychiatric Association's manual, depression can be diagnosed when patients exhibit five of the following symptoms within a two-week period: sadness, disinterest, fluctuating weight, irritability, hopelessness, or suicidal thoughts.

Types

• According to the National Institute of Mental Health, there are many types of depression. The most common is major depressive disorder, which is constant and stays with you for life. Dysthymic disorder is not as severe. It can last for two years and typically does not interfere with daily life. Psychotic depression includes hallucinations and delusions. Postpartum depression occurs after pregnancy. Seasonal affective disorder describes depression that changes with the seasons.

Target

• According to the National Institute of Mental Heath, women are more vulnerable to depression because of hormonal differences that affect mood and emotion.

Treatment

• Antidepressants prescribed to treat depression include Lexipro, Wellbutrin and Effexor. Light therapy and exercise are quick and inexpensive alternatives to consider if your depression is mild.

Warning

• According to Emedicine.com, more than 15 percent of people diagnosed with depression commit suicide. See Resources for a link to the National Suicide Prevention Lifeline.