Quick Overview
Panic disorder is characterised by recurrent, unexpected panic attacks followed by ≥1 month of persistent worry about further attacks or maladaptive behavioural change. Distinguish from isolated panic attacks (common, not pathological) and other anxiety disorders. NICE CG113 emphasises psychological therapy first-line, with pharmacotherapy reserved for non-responders or patient preference. Critical to screen for developing agoraphobia (avoidance of situations where escape feels difficult).
Core Facts & Concepts
Diagnostic Criteria (DSM-5/ICD-11)
- Panic attack: Abrupt surge of intense fear/discomfort peaking within minutes, with ≥4 of 13 symptoms (palpitations, sweating, trembling, dyspnoea, choking, chest pain, nausea, dizziness, paraesthesia, chills/heat, derealisation, fear of losing control, fear of dying)
- Panic disorder: Recurrent unexpected panic attacks PLUS ≥1 month of concern about attacks or maladaptive avoidance
- Key distinction: Isolated panic attacks ≠ panic disorder; requires persistent worry/behaviour change

Epidemiology & Comorbidity
- Prevalence: 1-2% adults; F:M ratio 2:1
- Peak onset: Late adolescence/early adulthood
- 50-65% develop agoraphobia if untreated
- High comorbidity: Depression (50-60%), GAD, substance misuse
NICE CG113 Treatment Hierarchy
| Line | Intervention | Specifics |
|---|---|---|
| 1st | Psychological therapy | CBT 7-14 hours over 4 months |
| 2nd | SSRI (if CBT declined/ineffective) | Sertraline 50mg OD (start dose) |
| 3rd | Alternative SSRI or imipramine/clomipramine | TCA if 2 SSRIs fail |
| Avoid | Benzodiazepines long-term | Only short-term crisis (2-4 weeks max) |
Problem-Solving Approach
Step-by-Step Assessment
- Rule out medical causes (10-15% have organic aetiology):
- 🩺 Cardiovascular: MI, arrhythmia, mitral valve prolapse
- 🫁 Respiratory: Asthma, PE, COPD exacerbation
- 🧠 Neurological: TIA, epilepsy (temporal lobe)
- ⚡ Endocrine: Hyperthyroidism, hypoglycaemia, phaeochromocytoma
- 💊 Substances: Caffeine excess, cocaine, amphetamines, medication withdrawal

-
Confirm panic disorder diagnosis:
- Document recurrent unexpected attacks (not just situational)
- Establish ≥1 month persistent worry/avoidance
- Exclude other anxiety disorders (specific phobia triggers, social anxiety)
-
Screen for agoraphobia (NICE CG113 safety-netting):
- Ask about avoidance of public transport, open/enclosed spaces, crowds, leaving home alone
- If present in ≥2 situations → diagnose agoraphobia (changes management)
-
Assess severity & risk:
- Frequency of attacks, functional impairment
- 🚩 Suicidal ideation (20-30% attempt suicide)
- Substance use as coping mechanism
Red Flags Requiring Urgent Review
- 🚩 Chest pain with cardiac risk factors → exclude ACS
- 🚩 New-onset panic age >45 years → investigate organic causes
- 🚩 Suicidal ideation with plan/intent
- 🚩 Severe agoraphobia preventing self-care
Analysis Framework
Differential Diagnosis: Panic Disorder vs Other Presentations
| Feature | Panic Disorder | GAD | Social Anxiety | Specific Phobia |
|---|---|---|---|---|
| Attack pattern | Unexpected, spontaneous | Persistent worry (not attacks) | Situational (social) | Situational (specific object) |
| Trigger | None (or internal cues) | Multiple life worries | Social evaluation | Specific stimulus |
| Duration | Minutes (peaks <10 min) | Months (chronic) | During/before event | During exposure |
| Avoidance | Multiple situations (if agoraphobia) | Difficult to avoid worries | Social situations only | Specific object/situation |
| Physical symptoms | Intense autonomic surge | Muscle tension, restlessness | Blushing, tremor | Varies by phobia |
CBT Components (NICE CG113 Recommended)
- Psychoeducation: Normalise physical symptoms, explain fight/flight response
- Cognitive restructuring: Challenge catastrophic misinterpretations
- Interoceptive exposure: Induce physical sensations (hyperventilation, spinning) to reduce fear
- In vivo exposure: Gradual confrontation of avoided situations (if agoraphobia)
- Breathing retraining: Controversial (may increase focus on symptoms)
SSRI Prescribing Considerations
- Start low: Sertraline 25-50mg OD (anxiety patients sensitive to activation)
- Warn: Symptoms may worsen first 2 weeks before improvement at 4-6 weeks
- Target dose: Sertraline 50-200mg, escitalopram 10-20mg
- Duration: Continue 12 months after remission, then taper slowly (6 months)
- 📊 Response rate: 60-80% with adequate dose/duration
Visual Aid
Quick Comparison: Panic Disorder Management Options
| Intervention | Evidence Strength | Time to Effect | Relapse Prevention |
|---|---|---|---|
| CBT | High (NNT=3) | 4-8 weeks | Excellent (skills retained) |
| SSRIs | High (NNT=5) | 4-6 weeks | Moderate (relapse if stopped) |
| Benzodiazepines | Moderate (short-term) | Immediate | Poor (dependence risk) |
| Self-help | Moderate | Variable | Good (if engaged) |
Key Points Summary
✓ Diagnosis requires: Recurrent unexpected panic attacks PLUS ≥1 month persistent concern/maladaptive behaviour change (not just isolated attacks)
✓ First-line treatment: CBT (7-14 hours over 4 months) including interoceptive exposure and cognitive restructuring per NICE CG113
✓ SSRI dosing: Start sertraline 50mg OD; warn about initial 2-week worsening; continue 12 months post-remission before tapering
✓ Safety-netting: Screen for agoraphobia development (50-65% risk) and assess suicidal ideation (20-30% attempt rate)
✓ Exclude medical causes: Cardiac (MI, arrhythmia), thyroid, hypoglycaemia, substance use - especially if new-onset age >45 years
✓ Benzodiazepine caution: Avoid long-term use (dependence risk); only short-term crisis management (2-4 weeks maximum)
✓ Red flag: Chest pain with cardiac risk factors → urgent ECG/troponin to exclude ACS before attributing to panic
⭐ Clinical Pearl: Panic disorder patients often present repeatedly to A&E with "heart attack" symptoms - document thorough cardiac workup once, then provide reassurance card for future episodes to reduce healthcare utilisation.
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