Causes & Treatment of Panic Disorder

Causes of Panic Disorder

Panic disorder involves recurrent unexpected panic attacks and persistent concern about future attacks. Multiple biological, cognitive, and environmental factors contribute.

Biological Factors

Genetic Contribution

Moderate to Strong Heritability:

Heritability Estimates:

  • 40-50% of variance due to genetic factors
  • Higher than most anxiety disorders
  • Runs in families: First-degree relatives of individuals with panic disorder have 8 times higher risk than general population

Twin Studies:

  • Monozygotic (identical) twins: If one has panic disorder, other has 40-50% concordance
  • Dizygotic (fraternal) twins: If one has panic disorder, other has 15-20% concordance
  • Clear genetic component

What Is Inherited:

  • Not panic disorder specifically
  • General anxiety vulnerability
  • Anxiety sensitivity (fear of physical sensations of anxiety)
  • Temperament: Behavioral inhibition, neuroticism
  • Physiological reactivity: Tendency toward strong autonomic responses

Specific Genetic Variants:

  • Some studies identify specific genes related to:
    • Serotonin system
    • Norepinephrine system
    • GABA system
  • No single “panic gene”; multiple genes each contribute small effect

Neurobiological Factors

Brain Structures and Circuits:

1. Amygdala (Fear Center):

  • Hyperactive in panic disorder
  • Oversensitive to threat cues, especially internal bodily sensations
  • Triggers fear response to normal physical sensations
  • Lower threshold for fear activation

2. Hippocampus:

  • Involved in contextual memory and fear conditioning
  • May have structural differences in panic disorder (some studies show smaller volume)
  • Difficulty distinguishing safe from dangerous contexts

3. Periaqueductal Gray (PAG):

  • Brainstem region involved in defensive behaviors
  • Generates panic-like responses (fight-or-flight)
  • May be overactive in panic disorder
  • Stimulation of PAG produces panic-like symptoms in humans and animals

4. Locus Coeruleus:

  • Brainstem nucleus; major source of norepinephrine in brain
  • “Alarm system” of brain
  • Overactive in panic disorder
  • Triggers arousal and panic symptoms

5. Prefrontal Cortex:

  • Normally regulates/inhibits amygdala and other fear structures
  • In panic disorder: Underactive regulation
  • Insufficient control over panic response
  • Cannot “turn off” false alarms

Fear Network Dysregulation:

  • Overactive fear detection (amygdala, PAG, locus coeruleus)
  • Underactive regulation (prefrontal cortex)
  • Result: False alarms - panic attacks triggered when no actual danger

Neurotransmitter Imbalances:

1. Norepinephrine:

  • Elevated in panic disorder
  • Main neurotransmitter of stress/arousal system
  • Contributes to physical symptoms: Racing heart, sweating, trembling
  • Overactive noradrenergic system

Evidence:

  • Medications that increase norepinephrine can trigger panic
  • Yohimbine (increases norepinephrine) provokes panic attacks in panic disorder patients

2. Serotonin:

  • Dysregulated serotonin system
  • Serotonin modulates anxiety and panic
  • Low serotonin may increase vulnerability to panic

Evidence:

  • SSRIs (increase serotonin) effective for panic disorder

3. GABA (Gamma-Aminobutyric Acid):

  • Primary inhibitory neurotransmitter (calms brain)
  • Deficient GABA function in panic disorder
  • Less inhibition → More panic

Evidence:

  • Benzodiazepines (enhance GABA) very effective for panic
  • Reduced GABA receptor binding in some brain regions

4. CCK (Cholecystokinin):

  • Neuropeptide
  • Elevated CCK may trigger panic
  • CCK agonists induce panic attacks in laboratory

Physiological Vulnerabilities

Autonomic Nervous System Hyperreactivity:

  • Overactive sympathetic nervous system (fight-or-flight)
  • Exaggerated physiological response to stressors
  • Rapid, intense arousal
  • Contributes to panic attack intensity

Respiratory Irregularities:

Carbon Dioxide (CO2) Sensitivity:

  • People with panic disorder hypersensitive to CO2
  • CO2 challenge test: Inhaling CO2-enriched air
    • Normal individuals: Mild discomfort
    • Panic disorder: Often triggers panic attack
  • May have oversensitive suffocation alarm system

Hyperventilation:

  • Rapid, shallow breathing
  • Reduces CO2 in blood
  • Causes symptoms: Lightheadedness, dizziness, tingling, breathlessness
  • Symptoms can trigger panic attack
  • Vicious cycle: Anxiety → Hyperventilation → Symptoms → More anxiety

Suffocation False Alarm Theory (Klein):

  • Panic attacks may be misfiring of suffocation alarm
  • Brain misinterprets bodily signals as suffocation threat
  • Triggers overwhelming urge to escape
  • Explains: Sensation of breathlessness in panic; CO2 sensitivity

Vestibular Dysfunction (Balance System):

  • Some evidence of vestibular system abnormalities
  • May contribute to dizziness and panic in some individuals

Behavioral Inhibition Temperament

Early Temperament:

  • Behavioral inhibition in childhood
  • Shy, fearful, cautious temperament
  • Predicts anxiety disorders, including panic disorder
  • Genetically influenced temperament

Cognitive Factors (Central to Panic Disorder)

Cognitive factors critical in development and maintenance of panic disorder

Anxiety Sensitivity (Most Important Cognitive Factor)

Definition:

  • Fear of anxiety-related sensations
  • Belief that physical symptoms of anxiety are dangerous or harmful
  • “Fear of fear”

Core Beliefs:

  • “Rapid heartbeat means I’m having heart attack”
  • “Dizziness means I’ll faint or lose control”
  • “Breathlessness means I’m suffocating”
  • “These sensations are dangerous and intolerable”

Dimensions of Anxiety Sensitivity:

  1. Physical concerns: Fear of physical sensations causing illness/death
  2. Psychological concerns: Fear of going crazy or losing control
  3. Social concerns: Fear of others noticing anxiety

Why It Causes Panic:

  • Experience normal anxiety symptoms (e.g., heart races during exercise)
  • Misinterpret as catastrophic (“I’m having heart attack!”)
  • Interpretation triggers more anxiety
  • More physical symptoms
  • Vicious cycle escalates to panic attack

Research Evidence:

  • Strongest predictor of panic disorder among cognitive factors
  • People with panic disorder have significantly higher anxiety sensitivity than those without
  • High anxiety sensitivity predicts development of panic disorder
  • Reducing anxiety sensitivity reduces panic attacks

Learned or Innate?:

  • Partly genetic
  • Partly learned (childhood experiences, modeling, information)

Catastrophic Misinterpretation of Bodily Sensations (Clark’s Model)

Clark’s Cognitive Model (1986): Most influential cognitive model of panic

Process:

1. Trigger:

  • Internal or external trigger causes bodily sensations
  • Could be: Exercise, caffeine, stress, anxiety, or nothing obvious

2. Perception of Bodily Sensations:

  • Notice physical sensations (heart racing, breathless, dizzy, etc.)

3. Catastrophic Misinterpretation:

  • Interpret sensations as sign of imminent catastrophe
  • “My heart is racing → I must be having heart attack → I’m going to die”
  • “I feel dizzy → I’m going to faint → I’ll lose control”
  • “Can’t catch breath → I’m suffocating → I’ll die”
  • “Feel unreal → I’m going crazy → I’ll lose my mind”

4. Anxiety Intensifies:

  • Catastrophic interpretation triggers more anxiety

5. More Physical Symptoms:

  • Increased anxiety produces more physical symptoms (heart races faster, more breathless, etc.)

6. Confirms Catastrophic Belief:

  • More symptoms “confirm” that something terrible happening
  • Vicious cycle escalates rapidly

7. Panic Attack:

  • Within seconds to minutes, escalates to full panic attack
  • Peak in 10 minutes

Key Insight:

  • Panic attacks result from misinterpretation of normal bodily sensations as catastrophic
  • Sensations themselves not dangerous; interpretation creates panic

Examples of Catastrophic Misinterpretations:

Cardiovascular Symptoms:

  • Rapid heartbeat → “Heart attack; I’m dying”
  • Chest tightness → “Heart problem; I’ll collapse”
  • Reality: Normal anxiety response; heart healthy

Respiratory Symptoms:

  • Breathlessness → “I’m suffocating; I’ll die”
  • Hyperventilation sensations → “Can’t breathe; I’m dying”
  • Reality: Anxiety-induced hyperventilation; not actual suffocation

Neurological Symptoms:

  • Dizziness → “I’ll faint; I’ll fall”
  • Reality: People with panic disorder almost never faint (increased blood pressure prevents it)
  • Tingling/numbness → “Stroke; I’m paralyzed”
  • Reality: Hyperventilation effect; benign

Cognitive/Perceptual Symptoms:

  • Derealization/depersonalization → “I’m going crazy; I’m losing my mind”
  • Reality: Common anxiety symptom; temporary; not insanity

Maintains Panic Disorder:

  • After panic attack, becomes hypervigilant to bodily sensations
  • Constantly monitoring body
  • Any sensation triggers catastrophic interpretation
  • Leads to more panic attacks

Interoceptive Conditioning (Fear Conditioning to Internal Sensations)

Classical Conditioning:

  • During panic attack, physical sensations (heart racing, breathlessness) paired with intense fear
  • Physical sensations become conditioned stimuli
  • Now any similar sensation triggers conditioned fear response
  • Can lead to panic attack

Example:

  • First panic attack at gym (heart racing from exercise)
  • Now elevated heart rate (even from climbing stairs) triggers panic
  • Conditioned to fear the sensation of rapid heartbeat

Generalization:

  • Fear can generalize to various physical sensations
  • Wide range of internal cues trigger panic

Maintaining Factors (Why Panic Disorder Persists)

1. Catastrophic Misinterpretations (Primary Cognitive Maintaining Factor):

  • Continue to misinterpret bodily sensations
  • Each panic attack reinforces belief that sensations dangerous
  • “I panicked, felt terrible; it must have been dangerous”
  • Never learn sensations are benign

2. Hypervigilance to Bodily Sensations (Body Monitoring):

Interoceptive Awareness:

  • Constantly monitoring body for threat cues
  • Notice every heartbeat, every breath, every sensation
  • “Checking” for signs of impending panic

Result:

  • Notice sensations others ignore
  • Even normal fluctuations seem significant
  • Attention to sensation amplifies it
  • Triggers catastrophic interpretation

3. Anxiety About Anxiety (Fear of Panic Attacks):

  • Anticipatory anxiety: Fear of having another panic attack
  • “When will next panic attack happen? What if I panic in public?”
  • Chronic state of anxious apprehension
  • Worry itself causes physical symptoms (tension, elevated heart rate)
  • These symptoms can trigger panic attack
  • Fear of fear maintains disorder

4. Avoidance Behaviors:

Situational Avoidance:

  • Avoid situations/places where panic occurred or where escape difficult
  • May develop into agoraphobia (fear and avoidance of many situations)
  • Common avoided: Crowded places, driving, public transportation, being alone, exercise

Interoceptive Avoidance:

  • Avoid activities that cause physical sensations similar to panic
  • Examples:
    • Avoid exercise (causes rapid heartbeat, breathlessness)
    • Avoid caffeine (increases heart rate, arousal)
    • Avoid hot rooms (sweating, flushing)
    • Avoid emotional movies or excitement (arousal)
    • Avoid conflict (increases arousal)
  • Very restrictive lifestyle

Why Avoidance Problematic:

  • Prevents exposure to sensations
  • Never learn sensations are safe
  • Strengthens belief sensations are dangerous (“I avoided, so I was safe; if I hadn’t avoided, something bad would have happened”)
  • Maintains disorder

5. Safety Behaviors:

Subtle Avoidance:

  • Behaviors used to prevent panic or catastrophe during panic
  • Intended to increase safety

Examples:

  • Carry medication “just in case”
  • Only go places with companion (never alone)
  • Sit near exit
  • Carry water bottle
  • Hold onto objects for support
  • Shallow breathing (trying to control breathing)
  • Distraction techniques

Why Problematic:

  • Prevent full exposure: Not truly experiencing situation without escape route
  • Maintain belief that catastrophe prevented only by safety behavior
  • “I didn’t have heart attack because I sat down quickly” (actually, wouldn’t have had heart attack anyway)
  • Hinder new learning: Don’t learn panic is not dangerous

6. Lifestyle Factors:

  • Poor sleep: Increases physiological arousal and vulnerability to panic
  • Caffeine/stimulants: Increase physical arousal, can trigger panic
  • Stress: Chronic stress sensitizes panic system

Developmental and Environmental Factors

Childhood Experiences

Parental Anxiety and Modeling:

  • Parents with panic disorder or anxiety
  • Child observes parent’s catastrophic reactions to bodily sensations
  • Learns to interpret sensations as dangerous
  • May develop anxiety sensitivity

Overprotective Parenting:

  • Parents excessively concerned about child’s health
  • Frequent doctor visits for minor symptoms
  • Teaches child that bodily sensations are worrisome
  • Increases attention to bodily sensations

Childhood Illness or Medical Trauma:

  • Serious childhood illness
  • Frightening medical procedures
  • May increase sensitivity to bodily sensations and health anxiety

Parental Reinforcement of Sick Role:

  • Child receives attention/care when ill
  • May learn to attend to physical symptoms
  • Increases interoceptive awareness

Stressful Life Events (Triggers)

Panic Disorder Often Begins After Stressful Period:

Common Triggers:

  • Major life stressor: Job loss, relationship breakup, death of loved one
  • Illness or injury: Personal or family member’s health scare
  • Use of drugs: Cannabis, stimulants (cocaine, amphetamines) can trigger first panic attack
  • Significant life transitions: Starting college, moving, having baby
  • Chronic stress: Prolonged period of high stress

First Panic Attack:

  • Often occurs during or after stressful period
  • May seem “out of the blue” but often follows stress
  • Sometimes during relaxation after stress (weekend, vacation)

Sensitization:

  • Chronic stress may sensitize nervous system
  • Lowers threshold for panic response

Biological Challenge Studies (Evidence for Biological Vulnerability)

Laboratory-Induced Panic:

Procedures That Trigger Panic in Vulnerable Individuals:

1. Sodium Lactate Infusion:

  • Infusing sodium lactate IV
  • In people with panic disorder: ~70% have panic attack
  • In controls: ~10%

2. CO2 Inhalation:

  • Breathing CO2-enriched air
  • Panic disorder patients much more likely to panic
  • Suggests hypersensitivity to suffocation cues

3. Yohimbine:

  • Drug that increases norepinephrine
  • Triggers panic in many with panic disorder

4. Caffeine:

  • High doses of caffeine
  • Can trigger panic in vulnerable individuals

Interpretation:

  • These challenges activate biological panic systems
  • People with panic disorder have lower threshold for panic response
  • Suggests biological vulnerability

Stress-Diathesis Model

Integrated Model: Vulnerability + Trigger + Maintenance = Panic Disorder

Biological Vulnerabilities (Diathesis):

  • Genetic predisposition (40-50% heritability)
  • Neurobiological factors (amygdala hyperactivity, norepinephrine excess, GABA deficiency)
  • Autonomic hyperreactivity
  • CO2 hypersensitivity

Psychological Vulnerabilities:

  • Anxiety sensitivity (fear of anxiety sensations)
  • Learned tendency to catastrophize bodily sensations
  • Interoceptive conditioning

Triggers (Stress):

  • First panic attack often during stress
  • Biological (drugs, hyperventilation) or psychological (stress) triggers

Catastrophic Misinterpretation:

  • After first panic, develops catastrophic beliefs about sensations
  • Vicious cycle begins

Maintaining Factors:

  • Catastrophic misinterpretations
  • Hypervigilance to sensations
  • Avoidance (situational and interoceptive)
  • Safety behaviors
  • Anticipatory anxiety

Result: Recurrent unexpected panic attacks and persistent fear of future attacks

Treatment of Panic Disorder

Panic disorder highly treatable; excellent prognosis with appropriate treatment

Cognitive-Behavioral Therapy (CBT) - Gold Standard

CBT for Panic (also called Panic Control Treatment or PCT): Most effective psychological treatment

Core Components:

1. Psychoeducation

Understanding Panic:

  • What is panic attack (body’s alarm system)
  • Fight-or-flight response: Normal, protective response to danger
  • In panic disorder: False alarm - alarm goes off when no real danger
  • Explain all symptoms of panic (physical, cognitive)

Why Symptoms Occur:

  • Physiological explanation for each symptom:
    • Rapid heartbeat: Pumping blood to muscles (prepare for action)
    • Breathlessness: Hyperventilation (taking in more oxygen)
    • Dizziness: Hyperventilation effect (decreased CO2)
    • Sweating: Body cooling itself
    • Trembling: Muscles tensed for action
    • Chest pain: Muscle tension, hyperventilation (NOT heart attack)
    • Tingling/numbness: Hyperventilation (blood flow redistribution)
    • Derealization: Hypervigilance effect

Key Message:

  • Symptoms are uncomfortable but NOT dangerous
  • Cannot die, have heart attack, go crazy, or lose control from panic
  • Panic attacks time-limited (peak in 10 minutes, subside within 30 minutes)

Catastrophic Misinterpretations:

  • Teach about catastrophic thinking
  • How misinterpretations drive panic
  • Vicious cycle of panic

Rationale for Treatment:

  • Explain each component
  • Why exposure to feared sensations necessary
  • How treatment works

Normalization:

  • Panic attacks common (experienced by many)
  • Panic disorder very treatable

2. Self-Monitoring

Panic Diary:

  • Record each panic attack: Date, time, location, symptoms, what doing, what thinking, intensity (0-100)
  • Identify patterns, triggers
  • Track progress

Body Sensation Monitoring:

  • Increase awareness of when attending to bodily sensations
  • Distinguish true panic attacks from anxious arousal

3. Breathing Retraining

Rationale: Hyperventilation contributes to panic symptoms

Diaphragmatic Breathing (Slow, Deep Breathing):

  • Breathe from diaphragm (belly breathing), not chest
  • Slow rate: ~10-12 breaths per minute (normal resting rate)
  • Smooth, even breaths

Practice:

  • Daily practice when calm (not just during panic)
  • Becomes automatic
  • Can use during panic to counteract hyperventilation

Controversy:

  • Some argue breathing retraining can become safety behavior
  • Current approaches emphasize breathing retraining as skill, not as way to prevent panic
  • Learn can control breathing, but also learn panic not dangerous even without controlling breathing

4. Cognitive Restructuring (Challenging Catastrophic Thoughts)

Goal: Identify and change catastrophic misinterpretations of bodily sensations

Process:

Step 1: Identify Catastrophic Thoughts:

  • During or before panic: What am I thinking?
  • Common thoughts:
    • “I’m having heart attack”
    • “I’m going to die”
    • “I’ll faint”
    • “I’m going crazy”
    • “I’ll lose control”

Step 2: Examine Evidence:

  • Evidence FOR the catastrophic interpretation: Usually very little actual evidence
  • Evidence AGAINST:
    • Doctor examined heart; it’s healthy
    • Had panic attacks before; never had heart attack
    • Panic symptoms match anxiety, not heart attack
    • Young and healthy; very unlikely
    • Read about panic; symptoms are classic panic, not danger

Example (Heart Attack Fear):

  • Thought: “My heart is racing; I’m having heart attack”
  • Evidence for: Heart is racing, chest feels tight
  • Evidence against:
    • Had EKG; heart is healthy
    • Had same symptoms many times before; never heart attack
    • I’m 28 years old with no heart disease risk factors
    • Symptoms started suddenly with anxiety (heart attacks usually gradual with exertion)
    • Symptoms of panic, not heart attack
  • Alternative thought: “My heart is racing because I’m anxious. This is panic, not a heart attack. Uncomfortable but not dangerous.”

Step 3: Reality Testing Questions:

  • “What’s the realistic probability?” (Usually very low)
  • “Has this ever happened before?” (No)
  • “What actually happened in past?” (Panic attack passed; was okay)
  • “What would I tell friend with same thought?” (It’s panic, not danger)

Step 4: Generate Alternative, Realistic Interpretations:

  • More accurate explanation for sensations
  • Based on anxiety physiology
  • “This is anxiety/panic, which is uncomfortable but not dangerous. It will pass.”

Common Catastrophic Thoughts and Alternatives:

“I’m having heart attack”:

  • Alternative: “My heart is healthy. This is anxiety increasing my heart rate, which is normal and safe. Racing heart from anxiety cannot cause heart attack.”

“I’ll faint”:

  • Alternative: “People with panic disorder almost never faint. Fainting requires drop in blood pressure, but panic increases blood pressure. I feel dizzy but won’t actually faint.”

“I’m going crazy/losing my mind”:

  • Alternative: “This is derealization, a common panic symptom. It’s temporary and not dangerous. I’m not going crazy; I’m having panic attack. Will pass in minutes.”

“I can’t breathe; I’ll suffocate”:

  • Alternative: “I’m hyperventilating, which makes me feel breathless but I’m actually getting too much air, not too little. Cannot suffocate from panic. If I slow my breathing, will feel better.”

“I’ll lose control / do something terrible”:

  • Alternative: “Have had many panic attacks and never lost control. This is fear, not reality. Anxiety makes me feel out of control, but I’m still in control of my actions.”

Practice:

  • Repeatedly practice identifying and challenging catastrophic thoughts
  • During exposure exercises
  • Eventually becomes automatic

5. Interoceptive Exposure (Most Critical Component)

Rationale:

  • Systematic exposure to feared physical sensations
  • Learn sensations are not dangerous
  • Break association between sensations and panic
  • Habituation: Repeated exposure reduces fear

Interoceptive = Internal Sensory

What It Is:

  • Deliberately induce physical sensations similar to panic
  • Repeatedly, systematically
  • Without avoidance or safety behaviors
  • Until fear of sensations decreases

Common Interoceptive Exposure Exercises:

1. Hyperventilate (Breathe Fast and Deep):

  • 60 seconds of rapid, deep breathing
  • Produces: Lightheadedness, dizziness, breathlessness, tingling, derealization
  • Mimics panic symptoms

2. Spin in Chair or Spin Standing:

  • Spin rapidly for 60 seconds
  • Produces: Dizziness, disorientation

3. Run in Place or Step-Ups:

  • 60 seconds of vigorous exercise
  • Produces: Rapid heartbeat, breathlessness, sweating

4. Breathe Through Straw:

  • Breathe through narrow straw while holding nose
  • 60 seconds
  • Produces: Breathlessness, air hunger

5. Hold Breath:

  • Hold breath as long as possible (usually 30-45 seconds)
  • Produces: Chest tightness, air hunger, urge to breathe

6. Tense All Muscles:

  • Tense entire body for 60 seconds
  • Produces: Muscle tension, trembling

7. Shake Head Side-to-Side:

  • Rapidly shake head for 30 seconds
  • Produces: Dizziness

8. Stare at Self in Mirror or Stare at Light then Wall:

  • Produces: Derealization, depersonalization

9. Drink Caffeinated Beverage:

  • If avoid caffeine
  • Produces: Increased heart rate, jitteriness

10. Wear Heavy Clothing in Warm Room:

  • Produces: Sweating, flushing, warmth

Process:

Step 1: Baseline Assessment:

  • Try each exercise
  • Rate anxiety (0-100) and similarity to panic (0-100)
  • Identify which exercises produce feared sensations

Step 2: Create Hierarchy:

  • Rank exercises from least to most anxiety-provoking
  • Start with moderate anxiety (not too easy or too hard)

Step 3: Repeated Practice:

  • Do same exercise repeatedly (multiple times in session, and across sessions)
  • Continue until anxiety decreases by at least 50% (habituation)
  • Then move to next exercise on hierarchy

During Exposure:

  • Stay with sensations: Don’t escape or use safety behaviors
  • Focus on sensations: Observe what feeling without judgment
  • Challenge catastrophic thoughts: Remind self, “These are just sensations; not dangerous”
  • Wait for anxiety to decrease: Anxiety will naturally reduce (habituation)

Frequency:

  • Practice daily at home
  • Multiple repetitions

Duration:

  • Each exposure 30-60 seconds (induce sensations)
  • Then pause and observe
  • Repeat multiple times

Why So Effective:

  • Direct extinction of fear of sensations
  • Learn sensations not dangerous (produce them repeatedly; nothing bad happens)
  • Sensations lose power to trigger panic
  • Break interoceptive conditioning
  • Increase confidence in ability to handle sensations

Generalization:

  • Once habituate to sensation in controlled setting (clinic, home), less likely to panic when sensation occurs naturally (during exercise, stress, etc.)

6. In Vivo Exposure (Situational Exposure)

For Patients with Agoraphobic Avoidance:

Goal: Face feared situations where panic occurred or where escape difficult

Process:

  • Create hierarchy of feared/avoided situations
  • Gradually, systematically face each situation
  • Stay until anxiety decreases (habituation)
  • Repeat multiple times

Examples:

  • Driving (start with short trips, progress to highway, bridges, etc.)
  • Crowded places (grocery store, mall)
  • Public transportation (bus, subway, airplane)
  • Being alone
  • Enclosed spaces (elevators)
  • Restaurants, movie theaters

Principles:

  • Without safety behaviors: No companion, no escape plan, no “just in case” medication
  • Prolonged: Stay until anxiety significantly reduced
  • Repeated: Do same exposure many times
  • Focus on sensations: When anxiety/symptoms arise during exposure, practice not catastrophizing

7. Eliminating Safety Behaviors and Avoidance

Identify Safety Behaviors:

  • Patient may not aware using them
  • Examples: Carrying medication, only going out with companion, sitting near exit, holding onto objects, constant body checking

Explain Counterproductive Nature:

  • Maintain belief that catastrophe prevented only by safety behavior
  • Prevent full exposure and new learning

Gradually Eliminate:

  • During exposure exercises, practice without safety behaviors
  • Learn can handle situation without them

8. Addressing Anticipatory Anxiety

Anticipatory Anxiety: Fear and worry about having future panic attacks

Interventions:

Cognitive Restructuring:

  • Challenge predictions: “Will I panic? If I do, will it be catastrophic?”
  • Reality: Panic attacks uncomfortable but not dangerous; time-limited

Decatastrophizing:

  • “What if I do panic? What’s the worst that would happen?”
  • Usually: Uncomfortable but manageable; panic will pass; no lasting harm

Acceptance:

  • Willing to experience panic if it occurs
  • “I don’t want to panic, but if I do, I can handle it”
  • Reduces fear of fear

Exposure Provides Confidence:

  • As habituate to sensations, anticipatory anxiety naturally decreases
  • Know can handle symptoms

Medications

Effective for panic disorder; often used in combination with CBT

First-Line Medications: SSRIs and SNRIs

Selective Serotonin Reuptake Inhibitors (SSRIs):

  • First-choice medications for panic disorder

Commonly Prescribed:

  • Sertraline (Zoloft) - FDA-approved for panic disorder
  • Paroxetine (Paxil) - FDA-approved for panic disorder
  • Fluoxetine (Prozac) - FDA-approved for panic disorder
  • Escitalopram (Lexapro)
  • Citalopram (Celexa)
  • Fluvoxamine (Luvox)

Serotonin-Norepinephrine Reuptake Inhibitors (SNRIs):

  • Venlafaxine (Effexor XR) - FDA-approved for panic disorder

Effectiveness:

  • 60-80% response rate (significant improvement)
  • Reduce frequency and intensity of panic attacks
  • Reduce anticipatory anxiety
  • Improve functioning

Timeline:

  • Takes 4-6 weeks to see initial reduction in panic
  • Full effects 8-12 weeks
  • Must take daily (not as-needed)

Initial Period Warning:

  • First 1-2 weeks: May temporarily increase anxiety (jitteriness, activation)
  • May increase panic attacks initially
  • Important to warn patients and persist through this period
  • Start with low dose and gradually increase

Duration:

  • Typically treat for 6-12 months after remission
  • Then consider gradual taper
  • Many patients need longer-term treatment

Side Effects:

  • Nausea, headache, sexual dysfunction, insomnia or drowsiness, weight gain
  • Usually mild and decrease over time

Discontinuation:

  • Must taper gradually (not stop abruptly)
  • Abrupt discontinuation causes withdrawal symptoms and high relapse risk

Benzodiazepines

Examples: Alprazolam (Xanax), Clonazepam (Klonopin), Lorazepam (Ativan)

Effects:

  • Enhance GABA (inhibitory neurotransmitter)
  • Very fast-acting (within 30-60 minutes)
  • Very effective at stopping panic attacks acutely

When Used:

  • Short-term: While waiting for SSRI to take effect (first 4-6 weeks)
  • As-needed: For specific situations (though can become problematic)
  • Severe cases: If SSRIs insufficient

Advantages:

  • Immediate relief
  • Very effective for panic

Problems:

  • Dependence and withdrawal: High risk with regular use; severe withdrawal
  • Tolerance: Need increasing doses over time
  • Sedation: Drowsiness, cognitive impairment
  • Rebound anxiety: When wears off, anxiety may spike
  • May interfere with CBT: Particularly interoceptive exposure (dampen sensations, prevent full learning; state-dependent learning)

Clinical Approach:

  • Prefer SSRIs for long-term
  • Benzodiazepines cautiously, short-term if needed
  • If used, scheduled dosing better than as-needed (prevents reinforcement of avoidance)

Discontinuation:

  • Must taper very slowly over weeks to months
  • Abrupt discontinuation dangerous (seizures possible)

Tricyclic Antidepressants (TCAs)

Examples: Imipramine (Tofranil), Clomipramine (Anafranil)

Effectiveness:

  • Effective for panic disorder
  • Older medications

Problems:

  • More side effects than SSRIs: Dry mouth, constipation, weight gain, dizziness, cardiac effects
  • Dangerous in overdose
  • Not first-line due to side effects

When Used:

  • If SSRIs/SNRIs not effective or not tolerated
  • Some patients respond better to TCAs

MAOIs

Example: Phenelzine (Nardil)

Effectiveness:

  • Can be very effective for panic disorder

Problems:

  • Dangerous dietary restrictions (tyramine-containing foods)
  • Many drug interactions
  • Rarely used today (only if other treatments failed)

Combined Treatment: CBT + Medication

Often Most Effective Approach:

Advantages:

  • Faster initial relief: Medication reduces panic quickly while CBT skills being learned
  • Higher response rates: May exceed either treatment alone
  • CBT provides lasting skills: Addresses maintaining factors cognitively and behaviorally

Considerations:

  • Some evidence benzodiazepines may interfere with interoceptive exposure learning
  • SSRIs less likely to interfere
  • Overall, combination often very helpful

Long-Term:

  • After CBT and stabilization, may taper medication
  • CBT skills remain: Lower relapse than medication alone
  • Some continue medication for maintenance

Treatment Effectiveness and Outcomes

CBT (Panic Control Treatment):

  • 70-90% response rate (significant improvement or remission)
  • Very high effectiveness
  • Effects maintained years after treatment (follow-up studies show lasting benefits)
  • Low relapse if treatment completed fully (20-30%)

Medications (SSRIs/SNRIs):

  • 60-80% response rate
  • Effective while taking
  • High relapse when discontinued (50-80% within 6 months)

Combined Treatment:

  • Response rates: 75-85%
  • May have lower relapse than medication alone
  • Often recommended for moderate-severe panic disorder

Duration of Treatment:

  • CBT typically 12-15 sessions (about 3-4 months)
  • Some patients improve faster
  • Maintenance/booster sessions may help prevent relapse

Predictors of Good Outcome:

  • Completing interoceptive exposure: Most critical
  • Eliminating avoidance and safety behaviors
  • No longer catastrophizing sensations
  • Early response to treatment
  • No comorbid conditions (or treating them)
  • Good adherence to homework

Most People Achieve Significant Improvement: Panic disorder one of most treatable anxiety disorders

Special Considerations

Nocturnal Panic Attacks (Panic During Sleep):

  • Some experience panic attacks waking them from sleep
  • Same treatment applies
  • May benefit from sleep hygiene, stress management

Panic Disorder with Agoraphobia:

  • Requires both interoceptive and in vivo (situational) exposure
  • May take longer (more situations to address)
  • Same principles apply

Comorbidity:

  • Often comorbid with depression, other anxiety disorders, substance use
  • May need to address comorbidities
  • Integrated treatment

Self-Help and Adjunctive Strategies

Self-Help Books:

  • CBT-based workbooks (e.g., “Mastery of Your Anxiety and Panic”)
  • Can be effective, especially with therapist guidance

Lifestyle Modifications:

  • Regular exercise: Reduces overall anxiety; provides exposure to physical sensations
  • Adequate sleep: Poor sleep increases vulnerability
  • Limit caffeine and stimulants: Can trigger panic
  • Avoid alcohol: Used to self-medicate but worsens anxiety long-term
  • Stress management: Reduce chronic stress

Support Groups:

  • Peer support
  • Share experiences and coping strategies

Apps and Online Programs:

  • CBT-based apps for panic
  • Emerging evidence for effectiveness
  • Accessible option

Key Points for Exams

Causes:

  • Biological: Genetics (40-50% heritability; family risk 8x higher), amygdala/PAG/locus coeruleus hyperactivity, norepinephrine excess, GABA deficiency, CO2 hypersensitivity, autonomic hyperreactivity
  • Cognitive (central): Anxiety sensitivity (fear of anxiety sensations - strongest predictor), catastrophic misinterpretation of bodily sensations (Clark’s model), interoceptive conditioning (conditioned fear of internal sensations)
  • Maintaining factors: Catastrophic misinterpretations (primary), hypervigilance to bodily sensations (body monitoring), anticipatory anxiety (fear of panic), avoidance (situational and interoceptive), safety behaviors

Clark’s Cognitive Model: Panic attacks result from catastrophic misinterpretation of normal bodily sensations; vicious cycle escalates rapidly

Anxiety Sensitivity: Strongest cognitive predictor; fear that anxiety sensations are dangerous

Treatment:

  • CBT (Panic Control Treatment) gold standard: Most effective; 70-90% response rate
  • Core CBT components: Psychoeducation (understanding panic physiology), self-monitoring, breathing retraining, cognitive restructuring (challenging catastrophic misinterpretations), interoceptive exposure (most critical - systematic exposure to feared physical sensations), in vivo exposure (if agoraphobia), eliminating safety behaviors, addressing anticipatory anxiety
  • Interoceptive exposure: Deliberately induce panic-like sensations (hyperventilate, spin, exercise, etc.); repeated practice until fear habituates; breaks fear of sensations
  • Medications: SSRIs/SNRIs first-line (effective; 60-80% response; may increase anxiety first 1-2 weeks); benzodiazepines fast-acting but dependence risk, may interfere with CBT; TCAs and MAOIs second-line
  • Combined treatment: Often most effective (CBT + SSRI)
  • Outcomes: CBT very effective with lasting benefits (low relapse 20-30%); medication effective but high relapse when stopped (50-80%); panic disorder one of most treatable anxiety disorders

Critical Treatment Element: Interoceptive exposure - learning feared sensations are not dangerous