Definition
A panic attack is a sudden surge of intense fear and physical symptoms that builds rapidly, peaks within about ten minutes, and ends on its own. Common symptoms include pounding heart, shortness of breath, chest tightness, dizziness, tingling in the hands or face, a sense that the surroundings aren't quite real, and a strong feeling that something terrible is about to happen.
What it can feel like
For most people the first one is the most frightening, because there's no context for it. A trip to the grocery store turns into a sense that the body is shutting down. The heart pounds in a way that seems too loud. The legs feel uncertain. There's often a strong urge to leave the room, the building, or the car. Many people who have had one go to the emergency department convinced they're having a heart attack.
Why it happens
A panic attack is driven by a fast release of adrenaline and related stress hormones, usually triggered by a perceived threat that may or may not be conscious. The body has no mechanism to sustain a maximum stress response indefinitely. Within minutes, the surge clears and the symptoms subside. When panic attacks recur and the person begins to fear them, the fear itself can become the trigger for the next one. This is the central pattern in panic disorder.
The 20- to 30-minute biological ceiling
A clinical observation that consistently changes how patients experience attacks. Adrenaline, the primary driver of the acute panic response, has a short half-life. The body can't sustain a maximum stress response indefinitely. Within 20 to 30 minutes of the peak, the surge clears regardless of what the person does during the attack. This biological time limit is why panic attacks are self-resolving and why most strategies that help during an attack don't actually stop it. They prevent the person from making it worse while the body's chemistry corrects on its own.
Knowing this in advance often shortens the experienced duration of attacks. Patients who have been told the attack will end on its own within half an hour stop fighting the experience, and the reduced struggle reduces the overall intensity.
What turns the dial up during an attack
Three things consistently amplify a panic attack and are worth recognizing in real time. Hyperventilating in response to chest tightness or air hunger lowers blood CO2 and produces tingling, lightheadedness, and a sense of unreality, all of which the brain interprets as further evidence of danger. Catastrophic interpretation of normal sensations, reading a fast heartbeat as a sign of impending heart attack, keeps the threat-detection system fully engaged. Trying to escape the situation reinforces avoidance and makes future attacks more likely in similar contexts.
The interventions that help during an attack work on these three. Slow paced breathing (inhale four seconds, exhale six or seven) corrects the CO2. Naming the experience as a panic attack rather than a medical emergency reduces the catastrophic interpretation. Staying in place, even briefly, prevents the avoidance from compounding.
Treatment of panic disorder
Panic disorder, defined as recurring unexpected panic attacks plus persistent worry about future attacks or significant change in behavior because of them, is one of the most treatable anxiety conditions. CBT for panic, particularly with interoceptive exposure (deliberate, graded exposure to the bodily sensations the patient has been avoiding) is the most-studied psychotherapy and produces remission in a majority of patients in 12 to 16 sessions. SSRIs at therapeutic doses are equally first-line; combined treatment is appropriate for moderate-to-severe presentations. Benzodiazepines aren't first-line for ongoing treatment because the rebound anxiety on discontinuation often reinforces the panic disorder rather than treating it.
When to see a clinician
A first panic attack often goes to an emergency department, which is a reasonable response and rules out cardiac causes. After that, recurring panic attacks are best treated by a clinician familiar with panic disorder, where CBT and SSRIs are both highly effective.