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What is Generalized Anxiety Disorder?
Generalized Anxiety Disorder (GAD) is a chronic mental health condition characterized by excessive, uncontrollable worry about everyday situations, lasting at least six months. According to the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5), GAD is marked by persistent anxiety that interferes with daily functioning and is disproportionate to the actual risk or impact of the feared events (American Psychiatric Association, 2013). The ICD-11 similarly defines GAD as a disorder with pervasive worry accompanied by physical symptoms like restlessness or muscle tension (World Health Organization, 2022).
Symptoms of Generalized Anxiety Disorder
DSM-5 diagnostic criteria require:
- Excessive anxiety and worry occurring more days than not for ≥6 months.
- Difficulty controlling the worry.
- At least three of the following symptoms (one for children):
- Restlessness or feeling “on edge”
- Fatigue
- Difficulty concentrating
- Irritability
- Muscle tension
- Sleep disturbances (insomnia or restless sleep)
Symptoms must cause significant distress or impairment and are not attributable to substance use or medical conditions (e.g., hyperthyroidism) (DSM-5; ICD-11).
Types of Anxiety Disorders (Related Conditions)
While GAD is a distinct diagnosis, other anxiety disorders include:
- Panic Disorder: Recurrent panic attacks with sudden fear peaks.
- Social Anxiety Disorder (SAD): Fear of social scrutiny.
- Specific Phobias: Intense fear of specific objects/situations.
- Separation Anxiety Disorder: Excessive fear of separation from attachment figures.
- Agoraphobia: Fear of situations where escape might be difficult (DSM-5; Oxford Textbook of Psychiatry).
Causes of GAD
GAD arises from a combination of factors:
- Biological: Dysregulation of neurotransmitters (e.g., serotonin, GABA), genetic predisposition (heritability ~30%), and hyperactivity in the amygdala and prefrontal cortex (Kaplan & Sadock’s Synopsis of Psychiatry).
- Psychological: Cognitive biases (e.g., catastrophizing), intolerance of uncertainty, and maladaptive coping strategies (Maudsley Guidelines).
- Environmental: Chronic stress, trauma, or adverse childhood experiences (ICD-11).
Diagnosing Generalized Anxiety Disorder
Diagnosis involves:
- Clinical Assessment: Structured interviews to evaluate worry duration, severity, and impact (DSM-5).
- Differential Diagnosis: Rule out medical conditions (e.g., cardiovascular issues) and other mental disorders (e.g., OCD, depression).
- Screening Tools: Generalized Anxiety Disorder-7 (GAD-7) scale or Penn State Worry Questionnaire (PSWQ).
- ICD-11 Criteria: Focus on functional impairment and symptom persistence (≥6 months).
Treatment for GAD
Evidence-based approaches include:
- Pharmacotherapy:
- First-line: SSRIs (e.g., sertraline, escitalopram) and SNRIs (e.g., venlafaxine) (Maudsley Prescribing Guidelines).
- Short-term: Benzodiazepines (e.g., lorazepam) for acute anxiety, limited due to dependency risks.
- Adjuvant: Buspirone or pregabalin for refractory cases.
- Psychotherapy:
- Cognitive Behavioral Therapy (CBT): Challenges irrational thoughts and promotes behavioral activation.
- Acceptance and Commitment Therapy (ACT): Enhances psychological flexibility.
- Mindfulness-Based Stress Reduction (MBSR): Reduces rumination (NICE Guidelines).
- Lifestyle Modifications: Regular physical activity, relaxation techniques (e.g., diaphragmatic breathing), and improved sleep hygiene (Oxford Textbook of Psychiatry).
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