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Classification

Expected Versus Unexpected Panic Attacks

Panic attacks can be expected, occurring in response to a specific environmental trigger (e.g., being in a tunnel), or unexpected, emerging randomly without an apparent cause (e.g., while relaxing). According to the DSM-5, a person must experience unexpected panic attacks to qualify for a diagnosis of panic disorder (APA, 2013).

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Updated 2026-07-06

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