Dozens of drugs, from illegal stimulants to common over-the-counter cold medicines, have been linked to heart attacks. The mechanisms vary widely: some drugs force coronary arteries into spasm, others accelerate the buildup of artery-clogging plaque, and still others shift the blood’s clotting chemistry in dangerous directions. The list includes substances most people would never suspect, and the risk often depends less on the drug itself than on dose, duration, and what else you are taking alongside it.
Cocaine and Methamphetamine
Cocaine is one of the most well-documented drug triggers for heart attack. It causes coronary artery spasm and activates platelets, both of which can block blood flow to the heart muscle and trigger a full-blown heart attack in otherwise young, healthy people with no prior heart disease.1PubMed Central. Cocaine-induced acute myocardial infarction The mechanism is fast: cocaine floods the body with norepinephrine and dopamine, causing arteries to clamp down while simultaneously driving up heart rate and blood pressure. That combination creates a perfect storm of oxygen demand the heart cannot meet.
Methamphetamine works through a related but distinct path. Chronic use accelerates atherosclerosis, the progressive buildup of fatty plaques inside artery walls, at an alarming rate. A posthumous study from southern California found that methamphetamine users had severe coronary artery disease at a rate of about 19%, compared to just 0.5% in age- and sex-matched controls. Australian studies reported that over half of examined methamphetamine users had coronary artery disease, with up to 10% showing extremely severe blockages not seen in control subjects.2PubMed Central. Methamphetamine Use and Cardiovascular Disease: in search of answers The damage shows up in strikingly young people. Recent research has highlighted rising rates of hypertension, coronary artery disease, and vasospasm in younger populations tied directly to methamphetamine use.3PubMed Central. Methamphetamine causes cardiovascular dysfunction via cystathionine gamma lyase and hydrogen sulfide depletion
NSAIDs and Common Pain Relievers
Nonsteroidal anti-inflammatory drugs occupy a strange place on this list because they are so universally used. Ibuprofen, naproxen, diclofenac, and the prescription-strength COX-2 inhibitors like celecoxib all carry some degree of cardiovascular risk. The underlying issue is that these drugs suppress the production of prostacyclin, a molecule that normally keeps blood vessels dilated and discourages clot formation, while leaving thromboxane, a clot-promoting molecule, relatively unopposed. That imbalance tips the scale toward clotting.4PubMed. Why do cyclo-oxygenase-2 inhibitors cause cardiovascular events?
The risk is dose- and duration-dependent. Short courses of ibuprofen for a headache are not the same as taking high-dose diclofenac daily for months. But if you already have heart disease and take aspirin for protection, ibuprofen creates a separate problem: it can physically block aspirin from doing its job. When ibuprofen is taken before aspirin, it occupies the same binding site on platelets and prevents aspirin from irreversibly shutting down thromboxane production. The result is that aspirin’s antiplatelet effect gets erased.5PubMed. Cyclooxygenase inhibitors and the antiplatelet effects of aspirin A study in patients with osteoarthritis and heart disease confirmed this: ibuprofen taken alongside aspirin led to measurably increased platelet clumping and faster clot formation compared to baseline, while celecoxib did not appear to interfere in the same way.6PubMed. Celecoxib, ibuprofen, and the antiplatelet effect of aspirin in patients with osteoarthritis and ischemic heart disease If you are on daily aspirin for your heart, the timing and choice of pain reliever genuinely matter.
Prescription ADHD Medications
Stimulant medications like mixed amphetamine salts (Adderall) and methylphenidate (Ritalin) raise heart rate and blood pressure, which understandably makes people worry about heart attacks. Case reports exist of heart attacks in adults taking these drugs, sometimes in people with no previously known heart disease.7PubMed Central. Adult ADHD Medications and Their Cardiovascular Implications But the large-scale evidence is more reassuring than those alarming case reports suggest.
A large cohort study of young and middle-aged adults found no increased risk of heart attack, sudden cardiac death, or stroke among current users of ADHD medications compared to non-users.8JAMA. ADHD Medications and Risk of Serious Cardiovascular Events in Young and Middle-aged Adults A more recent study looking at longer-term use found elevated risks for stroke and heart failure in adults taking higher daily doses, but notably found no apparent association with acute coronary syndrome, the clinical umbrella that includes heart attacks.9PubMed. Long-Term Cardiovascular Risk Associated With Treatment of Attention-Deficit/Hyperactivity Disorder in Adults The picture for ADHD stimulants is therefore more nuanced than “stimulants cause heart attacks.” They clearly stress the cardiovascular system, and someone with pre-existing heart disease or uncontrolled high blood pressure should discuss the risks carefully. But in the general adult population, the heart attack signal has not emerged in large studies the way it has for cocaine or methamphetamine.
Migraine Triptans
Sumatriptan and the related triptan family are the go-to acute treatment for migraine. They work by activating serotonin receptors that constrict swollen blood vessels around the brain. The problem is that the same type of serotonin receptor exists on coronary arteries, and activating it there can cause coronary vasospasm, a sudden tightening of the artery wall that chokes off blood flow to the heart.10PubMed Central. Sumatriptan-Induced Coronary Artery Vasospasm Leading to Acute ST Elevation Myocardial Infarction This concern was recognized early, and the safety profile of triptans has been debated for decades. The risk is concentrated in people who already have vascular risk factors, which is why triptans carry warnings against use in patients with known coronary artery disease, uncontrolled hypertension, or a history of stroke.11PubMed. The safety of triptans in the treatment of patients with migraine
In healthy people without vascular risk factors, triptan-induced heart attacks are rare. But the events that do occur can be dramatic, sometimes presenting as a classic ST-elevation heart attack that initially looks like a blocked artery on an electrocardiogram. In many reported cases, subsequent catheterization shows the arteries are actually clean, confirming that vasospasm rather than plaque rupture was the culprit.
Over-the-Counter Decongestants
Pseudoephedrine, found in many cold and sinus medications, is a sympathomimetic drug, meaning it mimics the effects of your body’s fight-or-flight chemicals. It releases stored norepinephrine, which raises blood pressure and constricts blood vessels. Most people tolerate this without issue, but case reports document heart attacks occurring even at recommended doses in otherwise healthy individuals. One report described a previously healthy young man who suffered a heart attack 45 minutes after taking an over-the-counter cold remedy containing pseudoephedrine. Catheterization afterward showed completely normal coronary arteries, pointing to vasospasm as the cause.12PubMed. Acute myocardial infarction after over-the-counter use of pseudoephedrine Another case involved a 45-year-old man who presented with an inferior heart attack pattern on his electrocardiogram after taking pseudoephedrine. When the vasospasm was reversed with a beta-blocker, his symptoms resolved and his arteries were found to be normal.13PubMed Central. Acute coronary syndrome presenting after pseudoephedrine use and regression with beta-blocker therapy
These cases are rare, and millions of people use pseudoephedrine every cold season without cardiac events. But they are a reminder that “available without a prescription” does not mean “harmless to the heart,” particularly for people with underlying hypertension or coronary artery disease who may not know it.
Hormonal Medications
Combined oral contraceptives, which contain both estrogen and a progestin, carry a small but real increase in heart attack risk. A Cochrane review found that users had roughly 1.6 times the risk of heart attack compared to non-users.14PubMed Central. Combined oral contraceptives: the risk of myocardial infarction and ischemic stroke A large Danish cohort study that followed over 1.6 million women confirmed this range, finding that most formulations roughly doubled the risk of heart attack regardless of the specific progestin used, although lower estrogen doses tended to carry somewhat lower risk.15PubMed. Thrombotic stroke and myocardial infarction with hormonal contraception
A doubling of a very small risk is still a small risk in absolute terms for most young, healthy women. The base rate of heart attack in women of reproductive age is low, so even a doubled rate translates to roughly 10 events per 100,000 person-years. But the picture changes dramatically for women who smoke. Smokers using combined oral contraceptives face about a tenfold increased risk of heart attack.16PubMed. Cardiovascular risk and the use of oral contraceptives Reassuringly, the elevated risk does not accumulate over years of use and appears to disappear after stopping the medication.
Anabolic Steroids
Anabolic-androgenic steroids, commonly used illicitly for bodybuilding, are a recognized cause of heart attacks in young men. They promote plaque buildup in coronary arteries, disrupt cholesterol profiles by lowering HDL (the “good” cholesterol), and can cause direct damage to the heart muscle.17PubMed Central. Anabolic Steroid-Induced Myocardial Infarction in a Young Male A 2025 study using coronary CT scans found that cumulative anabolic steroid use was associated with higher coronary calcium scores and the presence of non-calcified plaques, both markers of increased heart attack risk.18JAMA Network Open. Illicit Anabolic Steroid Use and Cardiovascular Status in Men and Women Unlike oral contraceptives, where risk fades after stopping, the arterial damage from anabolic steroids appears to persist. The plaques do not simply dissolve when someone stops cycling steroids.
Cancer Therapies
Several classes of cancer drugs carry cardiovascular risk that oncologists weigh carefully against the benefit of tumor control. The chemotherapy drug 5-fluorouracil (5-FU), one of the most widely used agents in gastrointestinal and other cancers, causes coronary vasospasm in a meaningful fraction of patients. In a review of roughly 4,000 patients treated with 5-FU at a single center over a decade, about 2% developed vasospasm. Those who experienced the complication were, on average, younger and actually less likely to have pre-existing cardiovascular risk factors than those who did not, making it difficult to predict who will be affected.19JACC: CardioOncology. The Incidence, Risk Factors, and Outcomes With 5-Fluorouracil-Associated Coronary Vasospasm
Bevacizumab, a widely used targeted therapy that works by starving tumors of their blood supply, raises the risk of arterial clotting events including heart attacks and strokes. A meta-analysis of more than 20,000 patients found that bevacizumab-treated patients had roughly 37% higher risk of arterial adverse events compared to controls. At high doses, the risk of cardiac ischemia climbed even further, with a relative risk above 4.20PubMed Central. Cardiovascular Adverse Events in Patients With Cancer Treated With Bevacizumab: A Meta-Analysis of More Than 20 000 Patients The drug’s mechanism makes this unsurprising: by blocking new blood vessel growth, it likely also disrupts the stability of existing vessel linings, making clots more likely to form.21PubMed Central. Cancer therapy and cardiovascular risk: focus on bevacizumab
Immune checkpoint inhibitors, the newer immunotherapy drugs like pembrolizumab and atezolizumab, have been linked to a range of cardiac complications including rare cases of heart attack. The suspected mechanism involves the immune system’s newly unleashed T cells either destabilizing atherosclerotic plaques, triggering coronary vasculitis, or causing spasm.22PubMed Central. Cardiac Toxicity Associated with Immune Checkpoint Inhibitors: A Systematic Review These cardiac events remain extremely rare, but the field of cardio-oncology is watching them closely as checkpoint inhibitor use expands into earlier-stage cancers and longer treatment durations.
The Sildenafil-Nitrate Combination
Sildenafil (Viagra) by itself has a mild blood-vessel-dilating effect, including in the coronary arteries. On its own, this is generally well tolerated. But combining it with nitrate medications, the nitroglycerin tablets or isosorbide that many heart patients use for chest pain, causes a severe and prolonged drop in both blood pressure and coronary blood flow. In vessels with existing narrowing, this can trigger ischemia or a heart attack.23PubMed. Effects of sildenafil citrate (Viagra) combined with nitrate on the heart This interaction is the reason the combination is absolutely contraindicated, and why emergency physicians ask about erectile dysfunction medications before administering nitroglycerin to someone having chest pain. It is one of the clearest examples of two individually manageable drugs becoming genuinely dangerous together.
Psychotropic Medications and Cardiac Arrest
Antidepressants and antipsychotic drugs are more often discussed in the context of sudden cardiac death from arrhythmia than heart attack in the classic “blocked artery” sense, but the distinction matters less than you might think when the end result is cardiac arrest. Many of these drugs prolong the QT interval on an electrocardiogram, a measure of the heart’s electrical recovery time. When the QT interval stretches too far, the heart becomes vulnerable to a dangerous rhythm called torsades de pointes, which can degenerate into cardiac arrest.24PubMed Central. Sudden cardiac death secondary to antidepressant and antipsychotic drugs Some drugs have also been linked to a Brugada-like pattern, another electrical abnormality that predisposes the heart to fatal arrhythmias.25PubMed Central. Mechanisms Underlying the Actions of Antidepressant and Antipsychotic Drugs That Cause Sudden Cardiac Arrest Several antipsychotics have been pulled from the market or restricted specifically because of these risks.
The practical concern here is that many patients on antipsychotics or certain antidepressants are also taking other QT-prolonging drugs, such as certain antibiotics or antifungals, and the combined effect is additive. A drug that is marginally safe on its own can push the QT interval into dangerous territory when paired with another QT prolonger. This is one area where your pharmacist is a genuine safety net, because automated drug-interaction checks catch most of these combinations before they reach you.
Withdrawal as a Trigger
Drugs can cause heart attacks not just when you take them but when you stop them abruptly. Beta-blockers, which are prescribed specifically to protect the heart, are the classic example. When propranolol, a commonly used beta-blocker, was abruptly discontinued in a group of patients with coronary artery disease, 10 patients developed serious ischemic events within two weeks. Six of those events were severe: three cases of unstable angina, one episode of dangerous ventricular tachycardia, one fatal heart attack, and one sudden death.26PubMed. Propranolol-withdrawal rebound phenomenon. Exacerbation of coronary events after abrupt cessation of antianginal therapy
The mechanism behind this rebound phenomenon involves the body’s adaptation to the drug. While you are taking a beta-blocker, your heart upregulates its sensitivity to adrenaline-like signals because the drug is blocking them. Remove the drug suddenly, and those newly sensitized receptors get hit with the full force of your normal adrenaline levels, which now feel like an overdose. The heart races, blood pressure spikes, and oxygen demand shoots up, all of which can precipitate a heart attack in someone whose arteries are already partially blocked. This is why every prescribing guide for beta-blockers emphasizes tapering slowly rather than stopping cold.
When Allergic Reactions Attack the Heart
One of the more surprising ways a drug can cause a heart attack has nothing to do with the drug’s intended pharmacology. Kounis syndrome is a condition in which an allergic or hypersensitivity reaction triggers coronary artery spasm or plaque instability, leading to a heart attack. The inflammatory mediators released during an allergic reaction, histamine and leukotrienes among them, can directly constrict coronary arteries and destabilize existing plaque.27PubMed Central. Allergic acute coronary syndrome (Kounis syndrome) This means that virtually any drug capable of causing an allergic reaction, from antibiotics to contrast dyes to anesthetics, is theoretically capable of triggering a heart attack in a susceptible person. The trigger is the immune response, not the chemical properties of the drug itself.
Kounis syndrome remains under-recognized in emergency departments. A patient presenting with chest pain and signs of anaphylaxis may have their cardiac symptoms attributed entirely to the allergic reaction’s effects on blood pressure, while the coronary vasospasm component goes unnoticed. Awareness has grown in recent years, but it remains one of those diagnoses that gets missed when clinicians are not thinking about it.
Why “How Much” and “What Else” Often Matter More Than “Which Drug”
Running through this list, a pattern emerges: very few drugs cause heart attacks in isolation, at therapeutic doses, in healthy people. The risk almost always scales with dose, duration, pre-existing heart disease, or co-administration with other cardiovascular stressors. Cocaine is an exception, capable of causing spasm and clotting in completely healthy arteries. But for most prescription and over-the-counter drugs, the danger is contextual. An NSAID taken for a week is different from one taken daily for a year. A triptan in a young woman without vascular disease is different from one in a 55-year-old smoker with borderline hypertension. An ADHD stimulant in a screened, monitored patient is different from one obtained without medical oversight.
The practical takeaway is not to avoid all of these drugs but to understand that cardiovascular context matters enormously when evaluating their safety. If you have coronary artery disease, high blood pressure, or a strong family history of heart attack, flagging every new medication with your physician and pharmacist is one of the simplest things you can do to reduce risk. Many of the most dangerous interactions and contraindications described here are well-known to clinicians and are caught at the prescribing or dispensing stage, but only if your full medication list and medical history are up to date.