Many common medications raise your resting heart rate, some by just a few beats per minute and others significantly. The threshold for a clinically fast heart rate (tachycardia) is 100 beats per minute at rest, but even smaller increases can be noticeable if you’re sensitive to changes in your body. The medications most likely to speed up your pulse fall into a handful of well-studied categories.
Stimulant Medications for ADHD
Stimulants prescribed for attention deficit hyperactivity disorder are among the most widely used drugs that raise heart rate. A meta-analysis of adult clinical trials found that stimulant treatment increased resting heart rate by an average of 5.7 beats per minute compared to placebo. Both amphetamine-based and methylphenidate-based formulations produced this effect, though the size varied across individual studies, from as little as 1.6 bpm to as high as 15.9 bpm in one trial.
This increase is driven by the way stimulants work: they boost levels of norepinephrine and dopamine, two chemical messengers that activate your body’s “fight or flight” response. For most healthy adults, a bump of 4 to 6 bpm is not dangerous, but it can become a concern if you already have a high resting heart rate or an underlying heart condition. If you notice a sustained racing or pounding sensation after starting or increasing a stimulant dose, that’s worth discussing with your prescriber.
Decongestants
Pseudoephedrine, the active ingredient in many cold and sinus products, reliably raises heart rate. A large meta-analysis published in JAMA found that pseudoephedrine increased heart rate by about 2.8 beats per minute on average. Extended-release formulations had a bigger effect, raising it by roughly 4.5 bpm, while immediate-release versions caused a smaller increase of about 2.3 bpm. There was also a clear dose-response pattern: the higher the dose, the faster the heart.
Pseudoephedrine works by narrowing blood vessels and stimulating the sympathetic nervous system, similar in principle to how stimulant medications work. If you’re taking it alongside other drugs that raise heart rate, the effects can stack. This is one reason pharmacies keep pseudoephedrine behind the counter, though it remains available without a prescription in most states.
Asthma and Breathing Medications
Short-acting bronchodilators like albuterol are designed to relax the muscles around your airways, but they can also speed up your heart. These drugs target a specific type of receptor (beta-2) in the lungs, yet they aren’t perfectly selective. They can stimulate closely related receptors in the heart, and they also cause blood vessels to widen throughout the body, which triggers a reflex increase in heart rate as your cardiovascular system compensates for the drop in blood pressure.
For most people, the heart rate bump from an inhaler is brief and mild. In rare cases, particularly in people with an undiagnosed electrical abnormality in the heart, albuterol has triggered serious rhythm disturbances. One documented case in a child with an undetected conduction disorder saw heart rate spike to 270 bpm after nebulized albuterol, though that same child later tolerated the drug without incident. The takeaway: occasional racing after using a rescue inhaler is common, but a sustained or severe episode is not typical.
Anticholinergic Drugs
Anticholinergics block a chemical messenger called acetylcholine, which normally acts as a brake on your heart rate through the parasympathetic nervous system. Remove that brake and the heart speeds up. This class includes drugs used for overactive bladder, certain stomach conditions, motion sickness, and some forms of COPD.
Tachycardia and palpitations are listed among the common side effects of anticholinergic agents. Other telltale signs that the drug is suppressing your parasympathetic system include dry mouth, constipation, blurred vision, and reduced sweating. In clinical practice, anticholinergic drugs are sometimes deliberately used to treat abnormally slow heart rates, which gives you a sense of how directly they influence heart rate.
Antidepressants
Several classes of antidepressants can increase heart rate, though the mechanisms differ. Tricyclic antidepressants (older drugs like amitriptyline) have strong anticholinergic properties, so they raise heart rate by blocking the same parasympathetic braking system described above. They also affect the heart’s electrical conduction, which is why overdose can be dangerous.
Newer antidepressants have a smaller effect, but it isn’t zero. A study of more than 38,000 electrocardiograms found that higher doses of certain SSRIs, particularly citalopram and escitalopram, were associated with changes in the heart’s electrical timing. SNRIs, which boost norepinephrine in addition to serotonin, can also nudge heart rate upward because norepinephrine is the same activating chemical behind the stimulant effect. The increase is usually modest, but it may be more noticeable at higher doses or when combined with other heart-rate-raising drugs.
Weight Loss Medications
Both older stimulant-type weight loss drugs and newer GLP-1 receptor agonists can increase heart rate, though the size of the effect varies widely.
GLP-1 drugs like liraglutide and semaglutide consistently raise heart rate by a small amount. In the 56-week SCALE trial, liraglutide at its weight-loss dose increased heart rate by 2.4 bpm compared to placebo. In patients with pre-existing coronary artery disease, the increase was larger, around 8 bpm. Semaglutide, dulaglutide, and other drugs in the same class have shown similar small increases of 1 to 2 bpm in large cardiovascular outcome trials. The exact mechanism isn’t fully understood, but it appears related to shifts in the balance between the sympathetic and parasympathetic nervous systems.
Among stimulant-type weight loss drugs, lisdexamfetamine (approved for binge eating disorder) raised heart rate by about 6 bpm in trials. Phentermine, one of the most commonly prescribed appetite suppressants, did not consistently raise heart rate in adults when used alone, though it did cause transient increases in adolescents. When combined with topiramate, the heart rate effect depended on where patients started: those with a resting rate below 60 saw a small increase, those between 60 and 90 saw no change, and those above 90 actually experienced a decrease of 5 to 15 bpm. Sibutramine, a now-withdrawn weight loss drug, raised heart rate by about 4 bpm and was pulled from the market partly due to cardiovascular concerns.
Caffeine, Alcohol, and Recreational Drugs
Not all substances that raise heart rate come from a pharmacy. Caffeine is a mild stimulant that increases heart rate in a dose-dependent way, especially if you’re not a regular consumer. Alcohol stimulates the sympathetic nervous system, shortens the electrical recovery time of the upper heart chambers, and increases delays in electrical signaling between them. This combination helps explain why binge drinking can trigger episodes of rapid or irregular heartbeat, sometimes called “holiday heart syndrome.”
Cocaine and amphetamines used recreationally are powerful sympathomimetics that can drive heart rate to dangerous levels and trigger life-threatening rhythm disturbances. These carry a far higher risk than any prescription medication at therapeutic doses.
Signs a Heart Rate Increase Needs Attention
A medication-related heart rate increase of a few beats per minute often goes unnoticed. But if you experience a racing or pounding heartbeat, chest pain, shortness of breath, dizziness, lightheadedness, or fainting, those symptoms suggest the increase is more than your body can comfortably handle. Chest pain, fainting, or significant shortness of breath alongside a rapid pulse warrants immediate medical evaluation, regardless of which medication you’re taking.
If you’re on multiple drugs from the categories above, the effects can compound. A stimulant for ADHD plus a decongestant for a cold plus a few cups of coffee, for example, could push your resting heart rate higher than any one of them would alone. Keeping track of your resting heart rate when you start or change medications gives you a useful baseline for spotting meaningful changes.