Drug of choice for acute panic attack
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Drug of Choice for Acute Panic Attack
Short-term / Acute (Abortive) Treatment
Benzodiazepines are the drugs of choice for an acute panic attack, providing rapid symptom control.
| Drug | Route | Notes |
|---|---|---|
| Lorazepam (0.5–2 mg) | PO / IV / IM | Most commonly used in the ED; preferred for its predictable absorption and lack of active metabolites |
| Alprazolam (0.25–0.5 mg) | PO | Historically favored; fast-acting but higher dependence potential |
| Clonazepam (0.25–0.5 mg) | PO | Longer half-life; less rebound anxiety; slightly lower dependence risk than alprazolam |
| Diazepam | PO / IV | Longer-acting; used less often acutely |
All benzodiazepines enhance GABA-A receptor activity, producing rapid anxiolysis within 15–30 minutes.
Key nuance: Benzodiazepines are less useful once a panic attack is already established — they work best early or prophylactically. Their main limitation is abuse potential and dependence with prolonged use. (Adams and Victor's Principles of Neurology, 12th Ed.)
Long-term / Prophylactic Treatment (not acute)
Once the acute episode resolves, long-term prevention is the goal:
- SSRIs (e.g., sertraline, escitalopram) — first-line for chronic panic disorder
- SNRIs (e.g., venlafaxine) — also effective
- Cognitive-Behavioral Therapy (CBT) — most durable benefit, especially combined with pharmacotherapy
- β-blockers (e.g., propranolol) — adjunct for somatic/autonomic symptoms (palpitations, tremor)
Special Considerations
- Elderly patients: Benzodiazepines are discouraged due to fall risk, cognitive slowing, paradoxical agitation, and drug interactions.
- Substance use history / respiratory disease: Use benzodiazepines with caution or avoid.
- Rule out life-threatening mimics first: MI, pulmonary embolism, hypoglycemia, arrhythmias, thyroid storm, pheochromocytoma — all can present similarly to a panic attack.
- Withdrawal from benzodiazepines itself can mimic panic; taper slowly if discontinuing.
Summary: For an acute panic attack, lorazepam is the most widely used drug of choice in clinical/emergency settings. Alprazolam and clonazepam are alternatives. For recurrent panic disorder, transition to an SSRI with CBT.
Sources: Tintinalli's Emergency Medicine, 9th Ed.; Adams and Victor's Principles of Neurology, 12th Ed.
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