Relief from an anxiety attack depends on whether you need something right now or a long-term strategy to prevent future episodes. For immediate, non-drug relief, a breathing technique called cyclic sighing (two short inhales through the nose followed by one long exhale through the mouth) can lower your heart rate and calm your nervous system within minutes. For medication options, both fast-acting prescriptions and daily preventive drugs exist, and the best choice depends on how often attacks happen and how severe they are.
Breathing Techniques That Work in Minutes
When an anxiety attack hits, your breathing becomes shallow and rapid, which feeds the cycle of panic. Deliberately slowing your exhale activates the vagus nerve, a long nerve running from your brain to your gut that acts as a brake pedal on your stress response. This is not a vague wellness tip. A 2023 study published in Cell Reports Medicine found that cyclic sighing, a pattern of deep breaths with extended exhales, improved mood and lowered respiratory rate more effectively than mindfulness meditation.
To do it: inhale through your nose, then take a second short inhale on top of that to fully expand your lungs, then exhale slowly through your mouth for as long as you can. Repeat for about five minutes. The key is making the exhale longer than the inhale. Box breathing (inhaling, holding, exhaling, and holding again for equal counts of four) is another option, though the research suggests exhale-focused patterns produce stronger calming effects.
Over-the-Counter Supplements
L-theanine, an amino acid found naturally in green tea, has modest evidence behind it for general stress and anxiety. In a randomized controlled trial, participants who took 200 mg per day for four weeks showed significant reductions in anxiety scores and improvements in sleep quality compared to placebo. It works by influencing the same brain signaling pathways as glutamate, a neurotransmitter involved in arousal and stress. You can find it in most supplement aisles, and it generally doesn’t cause drowsiness at that dose.
Magnesium is another commonly recommended supplement, particularly magnesium glycinate, which is better absorbed and less likely to cause digestive issues than other forms. Evidence for magnesium specifically stopping an active anxiety attack is limited, but people with low magnesium levels often report higher baseline anxiety, and correcting a deficiency can reduce overall tension. Neither of these will stop a full-blown panic attack the way a prescription medication can, but they may help take the edge off day-to-day anxiety that builds toward attacks.
Fast-Acting Prescription Medications
Benzodiazepines are the most commonly prescribed medications for stopping anxiety attacks quickly. Drugs in this class work by boosting the activity of GABA, the brain’s main calming chemical, which slows overactive nerve signals. The immediate-release form of alprazolam reaches peak blood levels in one to two hours, making it one of the faster options. Lorazepam is another frequently prescribed choice with a similar profile.
These medications are effective but come with a serious trade-off. The FDA requires a boxed warning (its strongest safety alert) on all benzodiazepines because of the risk of abuse, addiction, and physical dependence. Physical dependence can develop in as little as a few days to weeks of regular use, even when taken exactly as prescribed. Stopping suddenly after dependence has developed can cause withdrawal symptoms ranging from rebound anxiety to seizures. For this reason, most doctors prescribe them only for short-term or occasional use.
Non-Addictive Prescription Alternatives
Hydroxyzine is an antihistamine (the same drug class as allergy medications) that also reduces anxiety. It starts working in 15 to 30 minutes when taken by mouth, which makes it a reasonable option for people who want something faster-acting than a daily medication but without the dependence risk of benzodiazepines. Its sedating effects last about four to six hours. The main downside is drowsiness, which can be significant.
Beta-blockers like propranolol don’t treat the psychological component of anxiety, but they block the physical symptoms: racing heart, trembling hands, shaky voice. They work by slowing the heart’s response to adrenaline. Some people find that controlling the physical sensations prevents the spiral into a full panic attack, since a pounding heart is often the trigger that makes everything feel worse. These are especially popular for predictable anxiety, like public speaking or performance situations.
Daily Medications That Prevent Attacks
If you’re having anxiety attacks regularly, the standard treatment approach shifts from “what stops this one” to “how do I prevent the next one.” SSRIs (selective serotonin reuptake inhibitors) are the first-line medications for panic disorder. Three SSRIs currently have FDA approval specifically for panic disorder: sertraline (Zoloft), fluoxetine (Prozac), and paroxetine (Paxil).
These medications don’t work immediately. They typically take four to six weeks to reach full effect, and doctors usually start at a low dose to minimize side effects before gradually increasing. Sertraline, for example, often starts at 25 mg per day with a target range of 50 to 200 mg. The goal is to reduce the frequency and intensity of panic attacks over time, and many people find their attacks become rare or stop entirely. The trade-off is that SSRIs need to be taken daily, can cause side effects like nausea or changes in sleep during the first few weeks, and should be tapered gradually rather than stopped abruptly.
What to Avoid During Anxiety Attacks
Caffeine is one of the most common anxiety triggers that people overlook. It blocks adenosine receptors in the brain, which are involved in promoting calm and reducing arousal. This blockade increases the release of norepinephrine (the brain’s alertness chemical), activates your fight-or-flight system, and can mimic or amplify the exact physical sensations of a panic attack: racing heart, jitteriness, shortness of breath. If you’re prone to anxiety attacks, reducing or eliminating caffeine is one of the simplest and most impactful changes you can make.
Alcohol is another common but counterproductive choice. While it may feel calming in the moment, it disrupts sleep architecture and causes rebound anxiety as it wears off, often triggering attacks the next day. Nicotine follows a similar pattern, providing brief relief followed by increased baseline anxiety as levels drop.
Panic Attack vs. Heart Attack
Many people search for anxiety attack relief because they’ve just experienced symptoms that felt life-threatening. Chest tightness, difficulty breathing, numbness, and a sense of impending doom are hallmarks of panic attacks, but they overlap with heart attack symptoms. A few differences can help you tell them apart. Panic attacks come on quickly and generally reach peak intensity in about 10 minutes, then gradually fade. Heart attacks typically start slowly, with mild discomfort that worsens over several minutes, and the pain often radiates to the arm, jaw, or back. Panic attacks also almost always include intense fear as a central feature alongside the physical symptoms.
That said, if you’ve never had a panic attack before and you’re experiencing chest pain, treat it as a potential cardiac event until proven otherwise. Once a medical workup confirms your heart is healthy, you and your doctor can focus on managing the anxiety itself with the approaches above.