Panic Attacks and Panic Disorder

An abrupt surge that peaks within minutes

The formal definition is an abrupt surge of intense fear or discomfort that reaches a peak within minutes, during which four or more of a list of thirteen symptoms occur: pounding or racing heart, sweating, trembling, breathlessness, a choking sensation, chest pain, nausea, dizziness or feeling faint, chills or heat, numbness or tingling, a sense of unreality or detachment, fear of losing control, and fear of dying.

Two of those items are worth pausing on. Fear of losing control and fear of dying are symptoms of the attack, not judgements about what is happening. The conviction that you are dying is produced by the same process that produces the sweating.

Most people who have one do not have panic disorder

A panic attack is not a diagnosis. ICD-11 codes an isolated panic attack separately, and panic attacks occur across many conditions and in people with none.

The numbers are reassuring. Across twenty-five countries and nearly 143,000 people, about thirteen per cent had experienced a panic attack at some point, but only about thirteen per cent of that group met criteria for panic disorder. Lifetime prevalence of panic disorder itself was around 1.7 per cent.

Recurrence is what changes the picture. In the same surveys, recurrent panic attacks predicted the later onset of other mental health conditions, while single attacks did not.

The month that follows

Panic disorder requires recurrent unexpected attacks, meaning attacks not tied to a particular situation or trigger, plus at least a month of either persistent worry about further attacks or their consequences, or a significant change in behaviour designed to avoid them.

That second part is the engine of the illness. The attack lasts minutes; the worry and the avoidance last months. Someone stops driving on the flyover, then stops driving alone, then stops going out without a companion. Each step reduces anxiety in the short term and enlarges the problem in the long term.

The consequences of that escalation are visible in the data. Rates of coexisting conditions rise steeply from panic attacks alone, to panic disorder, to panic disorder with agoraphobia.

Why it peaks, and why it falls

Two things are happening at once. The first is a sympathetic nervous system surge, the fight-or-flight response: adrenaline, a fast heart, sweating, trembling, and blood redirected toward large muscles.

The second is over-breathing. Rapid breathing lowers carbon dioxide in the blood, which causes blood vessels in the brain to narrow slightly and reduces blood flow there. That is what produces the light-headedness, the sense of unreality and the tingling in the hands and around the mouth. It is also why the symptoms can feel neurological and frightening while being entirely benign.

The chest pain is usually muscular, from hard use of the chest wall and accessory breathing muscles. And the attack peaks and falls because the response is self-limiting: circulating adrenaline is cleared within minutes. The body cannot sustain it, which is why no panic attack has ever gone on indefinitely.

Assess it once, properly

Because the symptoms are genuinely physical, some physical conditions have to be considered. Cardiac arrhythmia, thyroid overactivity, asthma and COPD, and the effects of caffeine, stimulants, alcohol and certain inhalers all belong on the list. Low blood sugar, anaemia and, rarely, a phaeochromocytoma are also worth thinking about depending on the history.

The overlap with respiratory disease is real: a meta-analysis found panic disorder in about twelve and a half per cent of people with COPD, because breathlessness and chest tightness belong to both.

Guidance handles the balance well. Someone presenting to an emergency department with a panic attack should undergo the minimum investigations necessary to exclude acute physical problems, should not usually be admitted, and should be referred back to primary care. In other words: assess it once and assess it properly, then stop. Repeated investigation of the same symptoms becomes part of the illness.

Frequently, and frequently unrecognised

In a study of consecutive emergency-department chest pain patients at a hospital specialising in cardiac care, twenty-five per cent met criteria for panic disorder. Most had atypical chest pain and most were discharged with a non-cardiac diagnosis. Strikingly, ninety-eight per cent of the panic cases were not recognised as such by the attending cardiologists.

Two further findings from that study belong here. Forty-four per cent of the panic patients also had documented coronary artery disease, so the two coexist and one does not exclude the other. And a quarter of the panic disorder patients had had suicidal thoughts in the preceding week, against five per cent of the others. Panic disorder is not a trivial diagnosis to leave unmade.

Indian guidance describes the same pathway: the person perceives a serious medical emergency, reaches a hospital, is examined thoroughly, and is declared normal, with no explanation of what actually happened.

Two treatments, and one of them lasts

Cognitive behavioural therapy is the recommended psychological treatment, typically seven to fourteen hours in total in UK guidance, or ten to fifteen weekly sessions in Indian guidance, with briefer courses of six to seven sessions also shown to work.

Which parts of it matter has actually been tested. A component analysis of seventy-two trials covering more than 4,000 people found that interoceptive exposure, meaning deliberately bringing on the feared physical sensations in a controlled way, and a face-to-face setting were associated with better outcomes, while muscle relaxation had significantly lower efficacy and breathing retraining had minimal impact on efficacy.

Medication also works. In a network meta-analysis of eighty-seven trials covering 12,800 people, SSRIs, SNRIs and tricyclics all achieved higher remission than placebo, with sertraline and escitalopram singled out for combining good remission rates with a low risk of adverse events. Guidance recommends an SSRI licensed for panic disorder, continued for at least six months after the optimal dose is reached.

The most useful finding concerns what happens after treatment ends. Combined therapy beat medication alone both during treatment and after it stopped, but after stopping it was no better than psychological treatment alone. The durability comes from the therapy.

Fast, effective, and still not the answer

This deserves an honest treatment rather than a slogan. Guidance states that benzodiazepines are associated with a less good outcome in the long term and should not be prescribed for panic disorder. At the same time, two high-quality recent analyses rank benzodiazepines highest for short-term remission and best for tolerability.

Both statements are true, and the resolution is in the trials. Most were short, under twelve weeks, and almost all carried some risk of bias. Short trials measure precisely what benzodiazepines are good at and finish before the problem appears. The authors of the largest analysis note the documented risks of dependency and of difficulty stopping, which a short-term study cannot capture.

There is a second, mechanistic concern. The treatment that works best in panic disorder involves deliberately experiencing feared sensations and learning that nothing catastrophic follows. A tablet taken at the first sign of an attack can function as a safety behaviour that prevents exactly that learning. Notably, the strongest evidence for interoceptive exposure includes its use in helping people come off benzodiazepines.

In Indian practice this matters more than usual: clonazepam is prescribed as an anxiolytic several times more often than lorazepam in national prescribing surveys, and short courses have a way of becoming long ones.

Including some advice you will have been given

Breathing into a paper bag is actively advised against. Deaths have been reported in people whose hyperventilation turned out to be caused by a heart attack, a collapsed lung or a pulmonary embolism, where reducing oxygen was exactly the wrong move. The danger lies precisely in the situation where you are not yet certain it is panic.

"Just breathe deeply" is not the treatment either. Across three separate analyses, breathing retraining and muscle relaxation were the weakest components of therapy. They are comfort measures, and worth having, but they are not what changes the course of the illness.

Avoidance is the one that does the most damage. Every avoided situation reduces anxiety today and enlarges the territory the illness occupies. And fainting during a panic attack is uncommon, because the sympathetic response raises blood pressure rather than dropping it. The clear exception is fear of blood and injections, which follows a different physiological pattern.