The most commonly prescribed medications for panic attacks fall into two categories: antidepressants for long-term prevention and benzodiazepines for rapid relief. Most treatment plans start with an SSRI antidepressant as the foundation, with a benzodiazepine sometimes added for the first few weeks while the antidepressant takes effect. The specific combination depends on how frequent your panic attacks are, how severe they feel, and whether you have other conditions like depression.
SSRIs: The Most Common Starting Point
Selective serotonin reuptake inhibitors are the go-to prescription for panic disorder. Three SSRIs carry FDA approval specifically for panic disorder: fluoxetine (Prozac), paroxetine (Paxil), and sertraline (Zoloft). These medications work by increasing the availability of serotonin in the brain, which gradually recalibrates the fear response that drives panic attacks.
The catch is that SSRIs don’t work immediately. Therapeutic effects generally take a minimum of 6 to 8 weeks to emerge, and some people need up to 12 weeks on a given medication before they can tell whether it’s helping. During the first week or two, symptoms can temporarily worsen, which is why doctors typically start at a low dose and increase gradually. This initial bump in anxiety is one of the most common reasons people abandon treatment too early.
Side effects during SSRI treatment include nausea, fatigue, sweating, diarrhea, insomnia, and sexual dysfunction (particularly difficulty with ejaculation). A meta-analysis comparing SSRIs to benzodiazepines found that SSRIs actually cause more side effects overall during short-term treatment. That said, these side effects often diminish after the first few weeks, and SSRIs carry no risk of physical dependence, which makes them safer for long-term use.
SNRIs: A Close Alternative
Venlafaxine (Effexor XR) is the one SNRI with FDA approval for panic disorder. SNRIs work similarly to SSRIs but also increase norepinephrine activity, which can be helpful if anxiety coexists with low energy or concentration problems. The timeline and side effect profile are comparable to SSRIs. Your doctor might try an SNRI first, or switch to one if an SSRI doesn’t produce enough improvement.
Benzodiazepines: Fast-Acting but Short-Term
Two benzodiazepines are FDA-approved for panic disorder: alprazolam (Xanax) and clonazepam (Klonopin). These medications work within minutes to calm the nervous system, making them useful for stopping a panic attack in progress or preventing one in a high-anxiety situation. Alprazolam is typically started at 0.5 to 1 mg per day for panic disorder.
The speed of relief is what makes benzodiazepines appealing, but it also makes them risky for long-term use. Your body builds tolerance, meaning you need higher doses over time for the same effect. Physical dependence can develop within weeks, and stopping abruptly can cause rebound anxiety, insomnia, and in severe cases, seizures. The most common side effects during treatment are memory problems, constipation, dry mouth, drowsiness, and reduced sex drive.
Because of these risks, benzodiazepines are best used as a bridge. The typical approach is to prescribe one alongside an SSRI for the first 4 to 8 weeks, then taper off the benzodiazepine once the antidepressant reaches full effect.
What Tapering Off Looks Like
If you’ve been taking a benzodiazepine for more than a few weeks, stopping requires a gradual taper rather than quitting cold turkey. The standard approach is to reduce the dose by 10 to 25 percent every one to two weeks. The last phase of the taper tends to be the hardest, as rebound anxiety is common and can feel like the original panic symptoms returning.
Therapy makes a significant difference during this process. In one study of patients with panic disorder, those who received 10 sessions of group cognitive behavioral therapy during a slow taper had a 76 percent success rate in discontinuing the medication, compared to just 25 percent for those who tapered without therapy. If you’re tapering longer than six months, outcomes can actually worsen, so working with a therapist to build coping skills is a more effective strategy than simply extending the timeline.
Tricyclic Antidepressants for Difficult Cases
When SSRIs and SNRIs don’t provide enough relief, tricyclic antidepressants are sometimes prescribed. These are older medications that aren’t typically used first because they carry more side effects, including weight gain, dizziness, and heart rhythm changes. But they can be effective. Clomipramine, a tricyclic that strongly affects serotonin, has been shown to significantly reduce panic attack frequency and outperform tricyclics that primarily target norepinephrine. In a controlled trial, both types reduced panic attacks, but clomipramine produced greater improvements in anxiety ratings across multiple measures.
Tricyclics are generally reserved for people who haven’t responded to two or more first-line medications, or who can’t tolerate the side effects of SSRIs.
Therapy Alongside Medication
Medication alone reduces the frequency and intensity of panic attacks, but it works best when paired with cognitive behavioral therapy. CBT teaches you to recognize the physical sensations that trigger a panic spiral, reframe catastrophic thoughts (“I’m having a heart attack” becomes “my body is having an adrenaline response”), and gradually face situations you’ve been avoiding. The combination of medication and CBT produces better outcomes than either approach alone, and CBT skills persist long after medication is discontinued.
For many people, the long-term plan is to use medication to stabilize symptoms, build coping skills through therapy, and eventually taper off the medication while maintaining the behavioral strategies. Some people stay on an SSRI indefinitely if their panic disorder is severe or recurring, and that’s a reasonable choice given the low risk profile of these medications over time.
How Treatment Typically Unfolds
If you see a doctor about panic attacks, expect the first visit to focus on ruling out medical causes like thyroid problems or heart conditions, since many panic attack symptoms overlap with other diagnoses. Once panic disorder is identified, you’ll likely be started on a low dose of an SSRI, with instructions to increase the dose over the next few weeks. If your panic attacks are frequent or severe, a short-term benzodiazepine prescription may be added for immediate relief.
The first medication doesn’t always work. About one-third of people need to try a second or third option before finding one that provides adequate relief with tolerable side effects. Each new trial takes 8 to 12 weeks to fully evaluate, so the process of finding the right medication can take several months. Staying in close contact with your prescriber during this period helps, since dose adjustments and medication switches are much easier to manage with regular check-ins.