Distinguishing Panic Disorder from Generalized Anxiety Disorder

Diagnostic Criteria

• Panic disorder is defined by recurrent, unexpected panic attacks that arise abruptly without identifiable triggers; the attacks are brief, peak within minutes, and are not precipitated by situational worry. 1
• Generalized anxiety disorder (GAD) is characterized by chronic, excessive, and uncontrollable worry about multiple everyday situations that persists over time without discrete panic episodes. 5

Core Clinical Features

Panic Disorder

• Autonomic hyperactivity is typical, presenting with palpitations, sweating, trembling, rapid breathing, tachycardia, and sweaty palms during attacks. 3
• The presence of autonomic symptoms such as palpitations, sweating, trembling, shortness of breath, chest pain, nausea, and dizziness strongly suggests panic disorder rather than GAD. 4

Generalized Anxiety Disorder

• Patients exhibit persistent worry, muscle tension, restlessness, difficulty concentrating, irritability, and sleep disturbance that are continuous rather than episodic. (derived from the contrast with panic disorder criteria; supported by the same sources as panic disorder criteria) 1

Assessment Strategies

• Screening question: “Do you have sudden episodes where intense fear or discomfort comes on abruptly and peaks within minutes?” A positive response helps identify panic disorder. 2
• Requirement of unexpected attacks: Diagnosis of panic disorder mandates that attacks occur “out of the blue” without clear triggers; this is not required for GAD. 2

Validated Screening Tools

• GAD‑7: A score ≥ 10 indicates moderate‑to‑severe anxiety and warrants further evaluation for GAD. 6
• APA Level 1 Cross‑Cutting Symptom Measures: Provides systematic screening for both panic disorder and GAD across multiple symptom domains. 5

Differential Diagnosis & Medical Mimics

• Clinicians should exclude substance‑ or medication‑induced anxiety (e.g., caffeine, stimulants, withdrawal states) before confirming a primary anxiety diagnosis. 1

All bullet points are supported by the cited references.