A surprisingly wide range of drugs, both prescription and recreational, can trigger panic attacks in susceptible people. Stimulants, corticosteroids, certain antidepressants, cannabis, caffeine, and even some asthma inhalers have been documented as culprits. Withdrawal from drugs like benzodiazepines and alcohol can also provoke panic. The risk depends heavily on the substance, the dose, and the individual, so understanding which drugs carry this potential matters whether you are starting a new prescription or trying to make sense of symptoms that seem to come from nowhere.
Stimulant Medications
Prescription stimulants used for attention-deficit/hyperactivity disorder are among the most commonly reported medication triggers of panic attacks. Drugs like methylphenidate (sold as Ritalin and Concerta) work by raising dopamine and norepinephrine levels in the brain, which improves focus but also revs up the cardiovascular system. That physiological arousal, including increased heart rate and blood pressure, can cross a threshold into full-blown panic for some users. A case study and literature review published in the Iranian Journal of Child Neurology described a veterinary student whose prolonged use of methylphenidate, combined with academic stress, contributed to the onset of panic attacks. The paper noted that the autonomic responses triggered by the medication, especially during periods of withdrawal, may have set off the panic episodes.1PubMed Central. The Interrelationship Between ADHD and Panic Attacks: A Case Study and Comprehensive Literature Review
The mechanism is straightforward: stimulants push your sympathetic nervous system into a higher gear. If you already have a tendency toward anxiety or if you are sleep-deprived or under significant stress, that extra push can tip the balance. This does not mean everyone on a stimulant will experience panic, but it does mean that new-onset anxiety or panic-like symptoms while taking these medications should be reported to a prescriber rather than dismissed as ordinary stress.
Illicit Stimulants
Methamphetamine, cocaine, and other street stimulants carry a far higher risk than their prescription counterparts, partly because doses are unpredictable and partly because the drugs are more potent. A study following 526 methamphetamine-dependent adults found that over a quarter met criteria for a current or past anxiety disorder at three-year follow-up, with panic disorder identified in about 2.6% of the sample.2PubMed Central. Anxiety Disorders Among Methamphetamine Dependent Adults: Association With Posttreatment Functioning That percentage may sound small, but it exists against a backdrop where generalized anxiety disorder affected over 12% of the same group. The broader picture is that chronic stimulant use reshapes how the brain handles stress and arousal, leaving people vulnerable to panic long after they stop using.
Cocaine deserves its own mention because it is notorious for producing acute panic during intoxication. The surge of dopamine and norepinephrine closely mirrors what happens during a natural panic attack, and users frequently show up in emergency departments convinced they are having a heart attack. The combination of chest tightness, racing heart, and intense fear is indistinguishable from a panic episode, and in some cases, it genuinely is one triggered by the drug’s direct effects on the brain’s alarm circuitry.
Caffeine
Caffeine is the drug people most often forget is a drug. It is also one of the best-studied panic-provoking substances in clinical research. A systematic review and meta-analysis covering nine studies found that roughly half of patients with panic disorder experienced a panic attack after consuming caffeine, while none did after placebo. Among healthy volunteers, only about 1.7% panicked under the same caffeine challenge, compared to nearly 54% of the panic disorder patients.3PubMed Central. Effects of caffeine on anxiety and panic attacks in patients with panic disorder: A systematic review and meta-analysis The sensitivity gap is enormous, and it suggests that if you have any history of panic, your morning coffee may be doing more than waking you up.
Caffeine works by blocking adenosine receptors, which are normally responsible for making you feel sleepy and calm. The result is increased alertness, elevated heart rate, and a bump in stress hormones like cortisol. For most people this is a pleasant pick-me-up. For someone whose brain is already primed for panic, it can feel like an alarm going off. If you have been experiencing unexplained panic episodes and you drink several cups of coffee, strong tea, or energy drinks each day, caffeine is one of the first things worth reducing or eliminating as a test.
Antidepressants and Paradoxical Anxiety
One of the more frustrating experiences a patient can have is starting a medication meant to treat anxiety, only to feel more anxious and panicky in the first week or two. This phenomenon is well-documented with selective serotonin reuptake inhibitors (SSRIs) and other antidepressants. It even has a clinical name: jitteriness/anxiety syndrome. A prospective study of 301 patients starting antidepressants found that 7% developed this syndrome, and among those who did, about 14% experienced outright panic attacks as part of it.4Neuropsychiatric Disease and Treatment. A prospective naturalistic study of antidepressant-induced jitteriness/anxiety syndrome
The symptoms typically show up within the first few days of treatment and fade as the body adjusts, usually within one to two weeks. Insomnia, irritability, and agitation are the most common manifestations, with panic attacks representing the more severe end of the spectrum. This is why many clinicians start patients on a low dose and increase gradually, particularly for people already prone to panic. Knowing this effect exists is important because it prevents people from abandoning a medication that would ultimately help them once the initial activation phase passes.
Emergency-medicine literature has also flagged adverse reactions to psychiatric medications, including both SSRIs and antipsychotics, as a recognized category of psychiatric emergency that clinicians need to differentiate from a primary panic disorder.5PubMed Central. Recognition and Treatment of Psychiatric Emergencies for Health Care Providers in the Emergency Department: Panic Attack, Panic Disorder, and Adverse Drug Reactions In other words, if panic symptoms appear shortly after starting or changing a psychiatric medication, the medication itself should be considered as a possible cause.
Corticosteroids
Prednisone, dexamethasone, and other corticosteroids are prescribed for everything from asthma flare-ups to autoimmune conditions. They are powerful anti-inflammatory drugs, but they also reach the brain and can stir up significant psychiatric side effects. A review in the journal Diseases noted that mood disturbances, anxiety, and even psychosis are well-recognized but often underappreciated consequences of corticosteroid therapy.6PubMed Central. Corticosteroid-Induced Psychiatric Disorders: Mechanisms, Outcomes, and Clinical Implications
The risk tends to increase with dose and duration of use. Short courses at moderate doses cause psychiatric effects far less often than prolonged high-dose therapy. Anxiety and panic can appear alongside other symptoms like mood swings, insomnia, and agitation, which sometimes makes it hard to pinpoint the steroid as the culprit. If you have been placed on a corticosteroid and notice a dramatic shift in your mental state, including new panic-like episodes, it is worth raising with your doctor. Dose adjustments or switching to a different anti-inflammatory approach can sometimes resolve the problem.
Cannabis
Cannabis occupies an odd space in the panic conversation because many people use it specifically to relax, yet it is also one of the more common recreational triggers of acute panic. THC, the main psychoactive compound, can produce intense anxiety, paranoia, and panic at higher doses or in people who are not regular users. A case report published in Cureus documented the development of panic attacks after ten years of chronic cannabis use in a patient with no prior psychiatric history, leading the authors to conclude that cannabis-induced anxiety or panic disorders should be considered even in people without a psychiatric background.7PubMed Central. A Case of Panic Attacks Developing After 10 Years of Chronic Cannabis Use in a Patient With No Prior Psychiatric History
What makes cannabis tricky is that the relationship with anxiety is not linear. Low doses of THC tend to reduce anxiety for some users, while higher doses reliably increase it. The ratio of THC to CBD also matters; products very high in THC with little CBD are more likely to provoke panic. Edibles carry extra risk because they take longer to kick in, leading people to consume more than intended, and the resulting high is typically more intense and longer-lasting than inhaled cannabis. If you have experienced a panic attack while using cannabis, the practical takeaway is that dose and product composition matter enormously.
Respiratory and Thyroid Medications
Some drugs that have nothing to do with the brain can still trigger panic through indirect pathways. Beta-agonist inhalers like salbutamol (albuterol), widely used for asthma, stimulate beta-adrenergic receptors to open the airways. The same receptors also exist in the heart and nervous system, so these inhalers can cause racing heart, tremor, and a feeling of internal agitation that closely mimics the physical symptoms of a panic attack. At least one published case described salbutamol-induced panic disorder requiring treatment with an SSRI.8PubMed. Successful treatment of salbutamol-induced panic disorder with citalopram
Thyroid hormone replacement, specifically levothyroxine, is another under-the-radar contributor. Levothyroxine is prescribed to millions of people with an underactive thyroid, and in most cases it is well tolerated. However, research looking at women on levothyroxine with normalized thyroid levels found that they still had roughly double the odds of an anxiety disorder compared to women without hypothyroidism.9PubMed Central. Mood Disorders in Levothyroxine-Treated Hypothyroid Women Whether this is an effect of the medication itself, the underlying thyroid condition, or both remains debated. But if you are on levothyroxine and experiencing unexplained anxiety or panic, it is worth discussing with your prescriber. Doses that push thyroid levels slightly above the optimal range can produce symptoms indistinguishable from an anxiety disorder.
Weight Loss Medications
Phentermine, a sympathomimetic amine used as a short-term appetite suppressant, acts on the same neurotransmitter systems as amphetamines, though less potently. Its neuropsychiatric side-effect profile includes insomnia, mood swings, anxiety, panic attacks, irritability, increased anger, and agitation.10The Primary Care Companion for CNS Disorders. Weight Loss Medication Phentermine–Induced Hypomania in Bipolar Depression Because phentermine is often prescribed to people who may not consider themselves candidates for psychiatric side effects, these symptoms can be alarming and confusing. The risk is heightened in people with a personal or family history of mood or anxiety disorders. Newer weight-loss drugs in the GLP-1 receptor agonist class (like semaglutide and tirzepatide) work through different mechanisms and have not been linked to panic in the same way, though they come with their own set of side effects.
Psychedelic Drugs
Psilocybin, LSD, ayahuasca, and other serotonergic psychedelics are increasingly studied for their therapeutic potential in depression and PTSD, but they can also produce intense fear and anxiety during and after use. A mixed-methods study published in PLOS ONE found that the most common forms of extended difficulty following psychedelic use were feelings of anxiety and fear, existential struggle, social disconnection, and depersonalization.11PubMed Central. Extended difficulties following the use of psychedelic drugs: A mixed methods study “Extended” is the key word here: these were not just bad trips that ended when the drug wore off. Some individuals experienced persistent anxiety and panic symptoms lasting weeks or months.
This finding does not mean psychedelics are categorically dangerous, but it does complicate the narrative that they are safe when used mindfully. Set and setting matter a great deal, and people with a personal or family history of anxiety or psychotic disorders appear to be at elevated risk for negative outcomes. The emerging clinical trials use careful screening and supervised environments precisely because the potential for acute panic during a psychedelic experience is real and well-recognized by researchers.
Withdrawal as a Trigger
Sometimes the drug that causes panic is the drug you stop taking. Benzodiazepines, the class that includes alprazolam (Xanax), diazepam (Valium), and lorazepam (Ativan), are a textbook example. These medications are often prescribed for anxiety, yet stopping them abruptly after regular use produces a withdrawal syndrome that prominently features panic attacks. A review characterized the benzodiazepine withdrawal syndrome as typically including sleep disturbance, increased tension and anxiety, panic attacks, hand tremor, sweating, difficulty concentrating, palpitations, and headache.12PubMed. The benzodiazepine withdrawal syndrome The irony is hard to miss: a drug taken to prevent panic can produce worse panic when discontinued.
Alcohol withdrawal follows a similar pattern. A report of two cases described patients who developed full panic disorder after the cessation of chronic alcohol abuse. Both experienced severe panic and anxiety symptoms during acute withdrawal that then persisted long after the acute phase subsided, meeting diagnostic criteria for a standalone panic disorder.13PubMed Central. Panic disorder after the end of chronic alcohol abuse: a report of 2 cases This is a particularly vicious cycle: chronic drinkers often use alcohol to self-medicate anxiety, and quitting can unmask or create the very condition they were numbing. Gradual, medically supervised tapering is the safest route for both benzodiazepines and alcohol precisely because of these withdrawal risks.
Why Some People Are More Vulnerable
Not everyone who takes a stimulant or drinks a strong cup of coffee ends up having a panic attack. Individual vulnerability plays a large role, and several factors raise the risk. A personal or family history of anxiety disorders is the most obvious one. Having experienced a previous panic attack also sensitizes the brain’s fear circuitry, making it easier for a chemical trigger to set off another episode. Chronic stress and sleep deprivation lower the threshold as well, which is why drug-induced panic often occurs during particularly difficult life periods rather than out of the blue.
Genetic factors shape how your body metabolizes specific drugs, which can influence side-effect profiles. Someone who metabolizes caffeine slowly, for example, will have caffeine circulating in their system for much longer than a fast metabolizer, extending the window of potential anxiety. Similarly, variations in serotonin transporter genes and other neurotransmitter-related genes appear to influence who develops anxiety symptoms on SSRIs and who does not. The research on genetic vulnerability to panic is still developing, but the clinical implication is clear: two people on the exact same medication at the exact same dose can have very different experiences.
Substances Used in Research to Deliberately Provoke Panic
Researchers studying panic disorder need ways to reliably trigger panic attacks in a lab setting, and the substances they use are revealing. Carbon dioxide inhalation and sodium lactate infusion are two of the most well-studied provocation methods, both of which exploit the brain’s sensitivity to shifts in blood chemistry, particularly changes in pH and carbon dioxide levels.14PubMed Central. Neurobiology of panic and pH chemosensation in the brain People with panic disorder are far more likely to panic in response to these challenges than healthy volunteers, suggesting their brains have a hair-trigger alarm system for suffocation-related cues.
An even more striking example comes from cholecystokinin-4, a gut peptide fragment. When injected intravenously into ten healthy volunteers, it provoked short-lasting panic-like attacks in seven of them at doses between 20 and 100 micrograms.15PubMed. Cholecystokinin tetrapeptide induces panic-like attacks in healthy volunteers. Preliminary findings The fact that a naturally occurring peptide can produce intense, unexplainable fear in otherwise healthy people underscores that panic is fundamentally a neurochemical event. It does not require a psychiatric history or a psychological trigger. When a drug shifts your brain chemistry in the right direction, panic can follow regardless of your mental state beforehand.
Practical Steps When You Suspect a Drug Is Causing Panic
If you think a medication or substance is behind your panic attacks, resist the urge to stop a prescription drug abruptly. For many of the medications discussed above, sudden discontinuation carries its own risks, including rebound panic that can be worse than the original problem. Instead, bring it up with your prescriber and discuss whether a dose reduction, a slower taper, or a switch to an alternative medication makes sense.
For non-prescription substances, a trial of elimination is often the fastest way to test the connection. Cut out caffeine for two to three weeks. If you use cannabis, stop completely for the same period. Track whether your panic episodes change in frequency or intensity. Keep in mind that withdrawal effects from caffeine or cannabis can temporarily increase anxiety before things improve, so give the experiment enough time to be meaningful.
It is also worth noting that multiple factors often stack. A person might tolerate caffeine perfectly well until they start a new prescription stimulant or go through a period of poor sleep. The combination tips them over a threshold that no single factor would have crossed alone. Thinking about panic triggers in terms of cumulative load rather than a single cause tends to be more accurate and more useful for prevention. Reducing one or two modifiable factors, even if they are not the sole cause, can bring you back below the threshold where panic attacks fire.