Quick answer: The most common medications for panic attacks fall into four classes: SSRIs and SNRIs (first-line, taken daily, work in 2-4 weeks), benzodiazepines (fast relief in 15-30 minutes, short-term only due to dependence risk), beta-blockers (off-label, help with physical symptoms), and tricyclic antidepressants (older, second-line). SSRIs are the standard first choice because they address the root anxiety without addiction risk. Benzodiazepines should only bridge the first 2-4 weeks while an SSRI builds effect. No medication cures panic disorder alone, so therapy (particularly CBT) is essential for lasting recovery.
If you are having a panic attack right now, skip to "When to seek help" or call 988 (US Suicide and Crisis Lifeline).
Medication classes at a glance
Class · Examples · How it works · Onset · Duration · Main side effects · Dependence risk · Best for
SSRIs · Sertraline, paroxetine, escitalopram, fluoxetine · Increase serotonin availability · 2-4 weeks · Long-term (6-12+ mo) · Nausea, dry mouth, headache, sexual side effects (early weeks, often fade) · None; safe long-term · First-line daily treatment
SNRIs · Venlafaxine, duloxetine · Increase serotonin and norepinephrine · 2-4 weeks · Long-term (6-12+ mo) · Similar to SSRIs, slightly more activating · None; safe long-term · First-line when SSRI doesn't work
Benzodiazepines · Alprazolam, clonazepam, lorazepam · GABA receptor agonist, rapid CNS depression · 15-30 min · 4-12 hours (varies by agent) · Drowsiness, dizziness, impaired memory, coordination issues · High; dependence within 2-4 weeks if daily · Short-term bridge only (2-4 weeks max)
Beta-blockers · Propranolol, atenolol · Block adrenaline effects on heart/blood vessels · 30-60 min · 4-6 hours · Fatigue, low blood pressure, dizziness · None · Off-label for physical panic symptoms
Tricyclics · Amitriptyline, imipramine · Block norepinephrine reuptake · 2-4 weeks · Long-term · Weight gain, dry mouth, constipation, drowsiness, cardiac effects · Minimal · Second-line if SSRIs/SNRIs fail
SSRIs and SNRIs: First-line medications
SSRIs (selective serotonin reuptake inhibitors) and SNRIs (serotonin-norepinephrine reuptake inhibitors) are the recommended first-line medications for panic disorder. The American Psychiatric Association identifies SSRIs as the first-choice pharmacological treatment. They work by normalizing neurotransmitter imbalances in the brain that underlie panic vulnerability.
How they work
Panic attacks involve dysregulation of serotonin and norepinephrine, chemicals that regulate mood, fear response, and anxiety. SSRIs and SNRIs increase the brain's access to these chemicals by blocking their reabsorption, allowing existing supplies to work longer and more effectively. Over 2-4 weeks, this reduces panic frequency and intensity.
Onset and side effects
Expect 2-4 weeks before noticing benefit, with full effect by week 6-8. Early side effects (nausea, headache, jitteriness, dry mouth, sexual side effects) are common in the first 1-2 weeks but typically fade as your body adjusts. These medications do not cause dependence or tolerance, and they are safe for long-term use (6-12 months or longer).
How long to stay on them
Most people continue for 6-12 months after symptom resolution, then taper slowly under a doctor's supervision. Some need longer-term treatment, especially if panic has recurred in the past.
Benzodiazepines: Fast relief, strictly short-term
Benzodiazepines (alprazolam, clonazepam, lorazepam) deliver relief in 15-30 minutes by dampening overall brain activity. However, they carry real risks of tolerance, dependence, and withdrawal. The American Psychiatric Association advises against benzodiazepines as monotherapy (sole treatment) for panic disorder.
Why short-term only
Your body adapts to benzodiazepines quickly. After 2-4 weeks of daily use, you develop tolerance (needing higher doses) and physical dependence (difficulty stopping without withdrawal symptoms like rebound anxiety, insomnia, tremors, seizures in severe cases). Withdrawal can last weeks to months.
Best practice
Benzodiazepines are paired with an SSRI at treatment start: the benzodiazepine provides fast symptom relief while the SSRI takes 2-4 weeks to build effect, then the benzodiazepine is tapered and stopped. Do not use benzodiazepines alone or long-term.
Beta-blockers: Off-label for physical symptoms
Beta-blockers (propranolol, atenolol) block adrenaline's effects on the heart and blood vessels, slowing heart rate and reducing tremor, sweating, and shortness of breath. They work in 30-60 minutes and are sometimes used off-label to manage the physical panic symptoms while other treatments address the underlying anxiety.
When they help
Best for people whose panic is dominated by physical symptoms (racing heart, trembling, chest tightness). Beta-blockers do not address the catastrophic thinking or anticipatory anxiety that drives panic, so they are usually paired with SSRIs or therapy, not used alone.
Tricyclic antidepressants: Older, second-line
Tricyclics (amitriptyline, imipramine) are effective for panic but are second-line due to side-effect burden: weight gain, dry mouth, constipation, drowsiness, and cardiac effects in some people. They work in 2-4 weeks and do not cause dependence. Reserve them for people who cannot tolerate SSRIs or SNRIs.
Daily medication vs. as-needed: Which is right for you?
Daily SSRIs/SNRIs prevent panic attacks and reduce baseline anxiety. They take 2-4 weeks to work but prevent future attacks and address root causes. Best for moderate to severe panic or panic disorder (recurrent, unpredictable attacks).
As-needed benzodiazepines stop acute panic within 15-30 minutes. Tempting for people with infrequent attacks, but daily use for more than a few weeks risks dependence. If you find yourself reaching for a benzodiazepine more than 1-2 times per week, you need a daily SSRI instead.
Best approach: SSRI daily + benzodiazepine for the first 2-4 weeks if panic is severe, then stop the benzodiazepine while the SSRI becomes your main treatment.
Stopping medication: Taper, never quit cold turkey
Never stop an SSRI, SNRI, or benzodiazepine abruptly. Sudden cessation triggers withdrawal symptoms: rebound anxiety, insomnia, dizziness, "brain zaps" (electrical sensations), flu-like symptoms, and benzodiazepine withdrawal can be dangerous (seizures).
Taper schedule
Your doctor will create a gradual taper, typically over 4-8 weeks for SSRIs and 2-4 weeks for benzodiazepines (slower is safer). Do not speed it up, even if you feel ready.
What to ask your doctor about panic medication
- "Is an SSRI or SNRI right for me first, or should I start with a benzodiazepine bridge?" Clarifies your treatment plan.
- "Which SSRI or SNRI, and when should I expect to feel better?" Sets realistic expectations (usually week 4-6).
- "What are the most common side effects, and how long do they last?" Normalizes the first-week jitteriness so you don't quit.
- "Should I combine medication with therapy?" Yes; CBT + medication is more effective than either alone.
- "How long will I be on this medication?" Most people stay on SSRIs for 6-12 months minimum.
- "What if this first SSRI doesn't work?" Different SSRIs work differently; your doctor should try a second if the first doesn't help by week 8.
- "Can I drink alcohol on this medication?" Most SSRIs are safe with moderate alcohol, but benzodiazepines + alcohol is dangerous.
When to see a professional
Seek evaluation if:
- You have had 2 or more panic attacks
- You worry significantly about having another attack
- You are avoiding places where panic might happen (agoraphobia)
- Panic interferes with work, school, relationships, or daily functioning
- You are using alcohol or drugs to cope with anxiety
Chest pain or cardiac symptoms? If you have new, severe, or radiating chest pain (to arm, jaw, or back), call 911 or go to the ER. Panic attacks feel similar to heart attacks, so a clinician should rule out cardiac causes the first time.
Crisis support: Call or text 988 (US Suicide and Crisis Lifeline), NHS 111 option 2 (UK), or your local emergency number.
FAQ
What medication is best for panic attacks?
SSRIs are the gold standard first choice. Sertraline, paroxetine, and escitalopram have the strongest evidence. They prevent future attacks and address root causes without dependence risk. Benzodiazepines work faster (15-30 min) but are for short-term bridge use only (2-4 weeks), not ongoing treatment.
How long does panic medication take to work?
Benzodiazepines: 15-30 minutes. SSRIs and SNRIs: 2-4 weeks to start showing benefit, with full effect by week 6-8. Tricyclics: similar timeline to SSRIs, 2-4 weeks. Do not give up on an SSRI before 8 weeks.
Can I take medication without therapy?
Medication alone is effective for many people, but medication plus CBT (cognitive behavioral therapy) has higher success rates. If you cannot access therapy, medication is still worth trying. Ask your doctor about both options.
What if my first SSRI doesn't work?
This is common and not a sign that medication is "not for you." Different SSRIs work differently due to individual brain chemistry. Your doctor should try a second SSRI or switch to an SNRI. Most people find a medication that works within 2-3 tries.
Can I become addicted to SSRIs or SNRIs?
No. SSRIs and SNRIs do not cause addiction, tolerance, or dependence. You can stop them suddenly without withdrawal (though gradual taper is still recommended to avoid discontinuation symptoms). Benzodiazepines are different and do carry dependence risk if used beyond 2-4 weeks.
Can I drive or work on panic medication?
SSRIs and SNRIs generally do not impair driving or work once your body adjusts (after the first 1-2 weeks). Benzodiazepines, beta-blockers, and tricyclics can cause drowsiness or dizziness; be cautious with driving until you know how they affect you. Always follow your doctor's guidance.