Panic Attacks: Why They Feel Like Dying

A panic attack is one of the most frightening experiences a healthy person can have. The heart hammers, the chest tightens, breathing feels impossible, the hands go numb, the world takes on an unreal quality, and the overwhelming conviction is that something catastrophic is happening right now.

Nothing catastrophic is happening. Understanding precisely what is happening turns out to be a substantial part of the treatment, which is unusual in medicine and worth taking seriously.

🔄 The loop that sustains it

An adrenaline surge alone would be unpleasant and brief. What turns it into a panic attack is what happens next.

A sensation appears — the heart skips, the chest tightens, the head swims. It is interpreted as dangerous: this is a heart attack, I am suffocating, I am losing my mind. That interpretation is itself a threat signal, so the brain releases more adrenaline. Which intensifies the sensation. Which confirms the interpretation.

The loop closes within seconds and accelerates. What makes it so convincing is that each step genuinely follows from the last — the person is not imagining the symptoms and is not being irrational. They are reasoning correctly from a false premise.

This matters practically, because it identifies where the loop can be broken. Not at the sensation, which cannot be stopped by will. At the interpretation. Someone who knows what a racing heart during panic means does not add the second surge, and the attack collapses far faster.

💨 The part nobody explains

Half of what makes a panic attack terrifying comes from breathing, and the mechanism is counterintuitive enough that explaining it often produces visible relief.

During panic, breathing becomes fast and deep. That is the fight-or-flight response supplying oxygen for exertion that never happens. The oxygen is not used, so blood oxygen stays normal or rises slightly.

What falls is carbon dioxide, which is blown off faster than the body produces it. And carbon dioxide is not merely waste — it regulates the acidity of the blood, and through that a great deal else.

When it drops:

• Blood vessels to the brain narrow, producing light-headedness, blurred vision, and the sense that the world is not quite real
• Nerves become excitable, producing tingling and numbness in the hands, feet and around the mouth, and sometimes cramping of the fingers
• The chest wall tightens, producing chest discomfort
• The sense of not getting enough air intensifies — which is the cruellest part, because it drives more over-breathing

⏱️ Why it ends

A panic attack peaks within about ten minutes and typically settles within twenty to thirty. This is not encouragement; it is physiology.

The surge depends on adrenaline, and the body has a finite quantity available for immediate release. It cannot be sustained. There is also a counter-system that switches on automatically once the surge has run, actively bringing things back down.

So the attack is self-limiting by design. It cannot continue indefinitely, whatever you do or fail to do.

That fact does real work. A great deal of the fear during an attack is fear that it will escalate without limit — that the heart will keep accelerating, that breathing will stop. Knowing there is a ceiling, and that the descent begins on its own, removes a substantial part of what was fuelling the loop.

🫀 The question everyone asks

Almost everyone having a first panic attack believes they are having a heart attack, and going to be assessed is the correct response. This section is about the pattern afterwards, not about self-diagnosis.

🏥 The cycle that follows

What frequently happens next is its own problem.

The person is assessed, the tests are normal, they are told it was anxiety and sent home. The reassurance lasts a few days. Then another attack occurs, and the reassurance evaporates — because nobody explained the mechanism, only the absence of disease.

Some people go through this five or six times. Each normal result is reassuring for less time than the one before, and each visit reinforces the sense that something is being missed.

The way out is not another test. It is an explanation of what the symptoms are and why they occur, which is what converts a normal result from a puzzle into an answer.

🚪 How the world shrinks

Panic disorder rarely stays confined to the attacks. What disables people is what grows around them.

An attack occurs somewhere — a supermarket, a train, a motorway. The place becomes associated with it. That place is then avoided. The avoidance brings relief, which reinforces it. Then similar places are avoided.

Over months the accessible world contracts: no public transport, no crowds, no driving alone, eventually not leaving the house without a companion. That is agoraphobia, and it is not fear of open spaces — it is fear of being somewhere escape would be difficult or help unavailable if an attack began.

Alongside avoidance come safety behaviours: sitting near exits, carrying water, only going out accompanied, keeping a tablet in a pocket.

These feel protective and they are the mechanism by which the disorder persists. Every time an attack is survived while performing them, the person concludes the behaviour saved them — and never learns that the attack would have ended anyway. The safety behaviour prevents the discovery that would end the problem.

🔍 What should be excluded

Panic disorder is a positive diagnosis, and a small number of conditions produce identical episodes and should be considered once.

A fast heart rhythm disturbance is the most important. Certain arrhythmias start and stop abruptly, produce a racing heart, breathlessness, chest discomfort and terror, and are frequently diagnosed as panic for years. The clue is that the racing heart comes first and the fear follows, rather than the other way round, and that the rate is very fast and regular. An ambulatory heart monitor settles it.

An overactive thyroid produces anxiety, palpitations, tremor, heat intolerance and weight loss. One blood test.

Low blood sugar, particularly in anyone treated for diabetes.

Asthma, where breathlessness leads and anxiety follows.

Substances. Caffeine is a genuine and potent trigger, and people prone to panic are measurably more sensitive to it. Also stimulants, cannabis, decongestants, asthma inhalers, thyroid medication, steroids — and alcohol withdrawal, including the morning after heavy drinking.

Cutting caffeine deserves particular emphasis because it is free, it is frequently ignored, and in some people it substantially reduces attack frequency on its own.

🧠 The treatment that works best

Cognitive behavioural therapy for panic disorder has among the strongest evidence in psychiatry, and its distinctive component is one most people have never heard of.

Understanding the mechanism comes first — adrenaline, the loop, carbon dioxide, the self-limiting nature of the attack. For some people this alone reduces frequency considerably.

Then the interpretations are examined. Not by being told the fear is irrational, but by testing it: what actually happens, what has happened every previous time, what the evidence supports.

Then, distinctively, the sensations are deliberately produced. Spinning in a chair to create dizziness. Breathing quickly for a minute to create the tingling and unreality. Breathing through a narrow straw to create the sense of restricted air. Running on the spot to raise the heart rate.

This sounds unkind and it is the most effective element. The disorder is sustained by a learned association between a bodily sensation and catastrophe. Producing the sensation repeatedly, deliberately, and having nothing catastrophic follow, breaks the association at the level where it lives — which explanation alone cannot reach.

Then avoidance is reversed, gradually and by agreement, until the world reopens.

Most people improve substantially, many stop having attacks altogether, and the benefit persists after treatment ends, which is not true of medication.

💊 Medication

Medication is effective, particularly where attacks are frequent or avoidance is entrenched, and it works best alongside the above rather than instead of it.

SSRI antidepressants are first-line. They reduce both the frequency of attacks and the anticipatory dread between them.

Benefit takes four to six weeks, as with any SSRI, and treatment is usually continued for six to twelve months after response before considering reduction.

🚫 The tablet that undermines recovery

Benzodiazepines stop a panic attack within twenty minutes. Given that, prescribing one to carry seems obviously humane, and it works against the person in two specific ways.

It becomes a safety behaviour. The tablet is taken, the attack ends, and the person concludes the tablet ended it — when the attack was going to end anyway. That conclusion is never disproved while the tablet is available, so the central lesson of recovery is never learned. Merely carrying one has the same effect, which is why people describe not needing to take it as long as they have it.

It blocks the therapy from working. The whole mechanism of exposure treatment is experiencing the sensations without escape and discovering that nothing follows. A drug that removes the sensations removes the learning, and outcomes are measurably worse when the two are combined.

Added to that are tolerance, dependence within weeks, and withdrawal that produces anxiety indistinguishable from the original problem.

There is a narrow legitimate role — covering the first weeks while an SSRI takes effect, in someone severely disabled — and it is a short bridge rather than a long-term arrangement. The article on lorazepam covers that class in detail.

🛠️ During an attack

Name it. This is a panic attack. It has happened before. It will peak and pass.

Slow the breathing out. Not deep breaths — slow ones, with the out-breath longer than the in. Four counts in, six or more out. This restores carbon dioxide, which is what most of the frightening symptoms come from.

Do not fight it. Trying to stop it is another threat signal and adds adrenaline. Letting it run is genuinely faster.

Stay where you are if you safely can. Leaving ends the attack and teaches that leaving was necessary, which makes the next one likelier. This is the single most valuable thing to do and the hardest.

Put attention outside your body. Name what you can see, hear and touch. Monitoring your own heart rate feeds the loop directly.

Wait. Ten minutes to the peak. It is going to end.

🌙 Attacks that wake you

Some people wake abruptly from sleep in full panic. It is genuinely frightening because there is no trigger, no thought that started it, and no warning.

These are not nightmares — there is no dream. They occur in the transition between sleep stages and are a recognised feature of panic disorder rather than a separate problem.

They frequently lead to a fear of going to sleep, which produces sleep deprivation, which increases attacks. Breaking that requires treating the panic rather than the sleep, though the sleep problem needs saying out loud since it is rarely volunteered.

🩺 When to seek help

• A first episode of chest pain — always assessed, whatever you suspect
• Any episode different from your usual pattern, or brought on by exertion, or lasting beyond half an hour
• A racing heart that starts before the fear, very fast and regular — needs a heart rhythm monitor
• Recurrent attacks, or persistent dread of the next one
• Avoiding places or situations you previously managed
• Attacks waking you from sleep
• Drinking or using anything to manage it
• Low mood alongside, which is common and treatable
• Weight loss, tremor and heat intolerance with the attacks — check the thyroid
• Thoughts of self-harm — immediately

Treatment is stocked in the antidepressant category, including Lexaheal (escitalopram) and Sertafine (sertraline), both first-line for panic disorder and both started at a lower dose than for depression. Buspirone, in the anti-anxiety category, is effective for generalised anxiety and not for panic disorder, which is a distinction worth knowing before ordering.

❓ Frequently asked questions

📑 Sources and editorial

• DSM-5 criteria for panic attack, panic disorder and agoraphobia
• NICE guideline on panic disorder in adults
• Cognitive models of panic and the catastrophic misinterpretation of bodily sensations
• Research on hyperventilation, hypocapnia and the physiological basis of panic symptoms
• Trials of cognitive behavioural therapy with interoceptive exposure in panic disorder
• Evidence on combining benzodiazepines with exposure therapy and its effect on outcomes
• Guidance on SSRI initiation dosing in panic disorder and early activation symptoms
• Literature on supraventricular tachycardia misdiagnosed as panic disorder
• Studies of caffeine sensitivity and panic induction
• Related reading: generalised anxiety disorder, lorazepam and benzodiazepines
• Related products: antidepressant category
• RXshop Editorial Team — reviewed by Thomas Walsh, MD, Psychiatrist and Mental Health Specialist