Panic Attacks and Panic Disorder: What Is Happening in Your Body and How to Treat It

What Is a Panic Attack?

A panic attack is a sudden surge of intense fear or discomfort that reaches a peak within minutes and includes multiple physical and cognitive symptoms. They are extremely common — up to 35% of the general population experience at least one panic attack in their lifetime. Panic attacks feel catastrophic but are not medically dangerous.

DSM-5 defines a panic attack by the abrupt onset of at least 4 of the following symptoms, peaking within minutes:

• Palpitations, pounding heart, or accelerated heart rate
• Sweating
• Trembling or shaking
• Shortness of breath or smothering sensation
• Chest pain or discomfort
• Nausea or abdominal distress
• Dizziness, unsteadiness, or feeling faint
• Chills or hot flushes
• Numbness or tingling (paraesthesia)
• Feelings of unreality (derealisation) or being detached from oneself (depersonalisation)
• Fear of losing control or "going crazy"
• Fear of dying

The Physiology: Why It Feels So Terrifying

Panic attacks are essentially a misfired fight-or-flight response. The amygdala — the brain's threat-detection centre — triggers the sympathetic nervous system, flooding the body with adrenaline (epinephrine). This is the same cascade that would save your life from a real predator:

• Heart rate and force increase → palpitations
• Breathing becomes rapid and shallow → hyperventilation → CO2 drops → dizziness, tingling, chest tightness
• Blood redirected to large muscles → hands/feet may feel cold or numb
• Pupils dilate, senses sharpen → visual disturbances, feeling of unreality
• Digestion halts → nausea, abdominal cramps

The problem is that panic attacks perceive threat when there is none — and the physical symptoms themselves become threatening, creating a vicious cycle: fear → symptoms → more fear about symptoms → more symptoms.

Panic Disorder vs Isolated Panic Attacks

An isolated panic attack does not constitute a disorder. Panic disorder (affecting 2–3% of the population) is diagnosed when:

1. Recurrent, unexpected panic attacks occur
2. At least one attack is followed by ≥1 month of:
   • Persistent worry about more attacks or their consequences ("What if I'm having a heart attack?"), or
   • Significant behavioural change — avoidance of situations associated with attacks

The avoidance dimension is critical. Many people with panic disorder develop agoraphobia — avoiding situations from which escape would be difficult or embarrassing during a panic attack (public transport, crowds, open spaces, being alone). Agoraphobia can become severely limiting, sometimes confining people to their homes.

What Triggers Panic Attacks?

Panic attacks can be situational (triggered by specific situations) or completely unexpected ("out of the blue"). Common contexts:

• Physiological triggers: caffeine, stimulant medications, cannabis (especially high-THC), exercise, heat
• Sleep deprivation and jet lag
• Medical conditions that produce similar symptoms: hyperthyroidism, hypoglycaemia, cardiac arrhythmias, vestibular disorders — these must be excluded
• Stressful life events (often precipitate the first attack)
• Prior trauma (PTSD features can overlap)

Treatment: Cognitive-Behavioural Therapy (First-Line)

CBT for panic disorder is the most evidence-based treatment with effect sizes exceeding medication in long-term follow-up. The core components:

Psychoeducation

Understanding exactly what is happening physiologically during a panic attack removes the catastrophic misinterpretation. When you understand that dizziness is caused by hyperventilation (not a stroke) and that palpitations are adrenaline (not a heart attack), their ability to amplify panic is reduced.

Interoceptive Exposure

Deliberately inducing the physical sensations of panic in controlled conditions (spinning in a chair for dizziness, breathing through a straw for breathlessness, staring at a light for visual disturbance). This desensitises the fear response to the sensations themselves — breaking the "symptoms = danger" association.

Situational Exposure (with response prevention)

Systematic, graduated exposure to avoided situations (public transport, shops, driving alone) while remaining until anxiety decreases. Avoidance maintains panic disorder; exposure extinguishes it.

Breathing Retraining

Slow diaphragmatic breathing (4 seconds inhale, 6 seconds exhale) counteracts hyperventilation. Useful as a coping tool but should not replace exposure work.

CBT typically requires 12–15 sessions. A 2016 Cochrane review found that psychological therapies (predominantly CBT) were more effective than control conditions at reducing panic attack frequency and agoraphobia severity, with gains maintained at follow-up.

Medication

Medication is often combined with CBT for moderate-to-severe panic disorder:

• SSRIs (sertraline, escitalopram, paroxetine) — first-line pharmacotherapy; reduce attack frequency and severity; take 4–6 weeks for full effect; started at low dose to avoid initial symptom worsening
• SNRIs (venlafaxine) — equally effective; particularly useful with comorbid depression
• Benzodiazepines (alprazolam, clonazepam) — rapid symptom relief but not recommended for routine long-term use due to dependence, tolerance, and impaired CBT learning (anxiolytic drugs reduce the anxiety signal needed for exposure therapy to work)
• Tricyclic antidepressants (imipramine, clomipramine) — effective but less tolerated; second-line

Prognosis

Panic disorder responds well to treatment. With CBT, 70–90% of patients are panic-free at end of treatment; gains are maintained at 2-year follow-up. Without treatment, panic disorder tends to follow a chronic waxing and waning course, with agoraphobia often worsening over time. Early intervention produces better outcomes.