Doctors most commonly prescribe SSRIs (selective serotonin reuptake inhibitors) as the first-line, long-term treatment for panic attacks and panic disorder. For immediate relief during an acute attack, benzodiazepines like alprazolam (Xanax) or clonazepam (Klonopin) are the go-to options. Most treatment plans combine a daily medication to prevent panic attacks from happening with a fast-acting medication for breakthrough episodes, especially in the early weeks before the daily medication kicks in.
SSRIs and SNRIs: The First-Line Treatment
SSRIs and SNRIs are considered first-line therapies for panic disorder because they’re effective and generally well tolerated. These medications work by increasing the availability of serotonin in the brain, which gradually stabilizes the overactive fear response that drives panic attacks. They don’t work instantly. Control builds gradually over two to four weeks, and full therapeutic effects can take four to six weeks, sometimes up to nine to 12 weeks in certain individuals.
Several SSRIs are commonly used for panic disorder. Sertraline is often started at 25 mg per day and gradually increased to between 50 and 200 mg. Paroxetine typically starts at 10 mg per day, with the best clinical response seen at 40 to 60 mg. Fluoxetine is usually started between 5 and 15 mg per day and titrated up to 40 to 60 mg. Its unusually long half-life makes it a practical choice if you sometimes forget a dose. Fluvoxamine is another option, generally started at 50 mg per day with a target of 150 mg.
Among SNRIs, venlafaxine has shown effectiveness for panic disorder. One clinical study found that relatively low doses (50 to 75 mg per day) completely eliminated panic attacks in participants.
The starting doses for all these medications tend to be low, and your doctor will increase them gradually. There’s a good reason for this: people with panic disorder are more likely to notice and react to physical side effects than other patients. Because panic attacks involve intense awareness of bodily sensations like heart racing and stomach distress, people prone to panic are acutely tuned in to any new physical changes. Starting low and going slow helps minimize the risk that early side effects trigger more anxiety. The most commonly reported side effects include gastrointestinal issues, cardiovascular sensations, and neurological effects like dizziness or headache.
Benzodiazepines for Immediate Relief
Two benzodiazepines are FDA-approved specifically for panic disorder: alprazolam (Xanax) and clonazepam (Klonopin). These work fast, calming the nervous system within minutes rather than weeks, which makes them useful for stopping a panic attack that’s already in progress or for bridging the gap while an SSRI builds up in your system.
Alprazolam is short-acting, with a typical maintenance dose of 2 to 4 mg per day divided into multiple doses throughout the day. Clonazepam is longer-acting, with an optimal range of 1 to 2 mg per day. The longer duration means fewer peaks and valleys in symptom control, which some people find more manageable.
The tradeoff with benzodiazepines is real. They carry a risk of physical dependence, and tolerance can develop, meaning the same dose becomes less effective over time. Stopping them abruptly after regular use can cause withdrawal symptoms, so tapering under medical supervision is necessary. For these reasons, most guidelines recommend benzodiazepines as a short-term tool rather than a long-term solution, and they’re generally prescribed alongside an SSRI or SNRI rather than on their own.
Beta-Blockers for Physical Symptoms
Beta-blockers aren’t a standard panic disorder treatment, but some doctors prescribe them off-label to manage the physical side of panic, particularly a racing heart, trembling, and shaking. They work by blocking the effects of adrenaline, slowing your heart rate and relaxing blood vessels. This can take the edge off the physical spiral that makes a panic attack feel life-threatening, even though it doesn’t address the underlying anxiety. Beta-blockers are more commonly used for performance anxiety or situational panic than for full-blown panic disorder.
Other Medications Doctors May Try
When SSRIs and benzodiazepines aren’t a good fit, doctors have several alternatives. Hydroxyzine is an antihistamine that’s FDA-approved for anxiety. It’s commonly used as a substitute for benzodiazepines in both inpatient and outpatient settings because it causes sedation without the same dependency risk. Studies have found it comparable to benzodiazepines for anxiety relief, though drowsiness is a frequent side effect.
Gabapentin, an anticonvulsant, is sometimes prescribed off-label for panic. The evidence is limited, but one randomized controlled trial found it outperformed placebo specifically in patients with severe panic symptoms. Pregabalin, a related medication, has shown potential for social anxiety but requires relatively high doses.
Tricyclic antidepressants are an older class that can work for panic disorder. Imipramine, the most studied, is typically started at 10 mg per day and gradually increased, with doses up to 300 mg sometimes needed. Clomipramine can achieve its effects at lower doses, generally 50 to 150 mg per day. These medications are effective but tend to cause more side effects than SSRIs, which is why they’ve been largely replaced as first-choice options.
What the Treatment Timeline Looks Like
The first few weeks of treatment are often the hardest. Your daily medication hasn’t reached full effect yet, and some people experience a temporary increase in anxiety when starting an SSRI. During this window, your doctor may prescribe a benzodiazepine to use as needed for acute episodes. As the SSRI builds to therapeutic levels over four to six weeks, many people find they need the benzodiazepine less and less.
Once your panic attacks are under control, most guidelines recommend staying on medication for a significant period rather than stopping right away. Panic disorder has a tendency to recur, and continuing treatment after symptoms improve helps consolidate those gains. When you and your doctor eventually decide to taper off, the process is gradual, reducing the dose in small steps to minimize the chance of symptoms returning.
Medication is most effective when combined with therapy, particularly cognitive behavioral therapy. The medication quiets the alarm system enough for you to learn and practice new ways of responding to panic sensations, and those skills persist even after you stop taking the medication.