Can CBD Gummies Make Your Heart Race

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Get the essential information related to CBD and heart arrhythmia. Modern studies and anecdotal reports are included. One of the most common side effects of cannabis, a spike in heart rate, happens to be one of the scariest and can even turn new users off from the plant. Heart palpitations are a scary but common side effect of consuming cannabis. Read on for what to expect and how to deal with this symptom.

CBD and Heart Arrhythmia: What We Know So Far

The relationship between CBD and arrhythmia is somewhat complicated.

Contemporary scientific research shows that CBD has a potentially beneficial effect on arrhythmia, and on the cardiovascular system as a whole.

On the other hand, a small percentage of people experience an increased heart rate and heart palpitations when they use CBD, which are known symptoms of arrhythmia.

Before we get into more details of the research, let’s briefly explain arrhythmia.

Cardiac arrhythmia is a group of conditions characterized by an irregular heartbeat, where the heart either beats too rapidly or too slowly.

One of the main symptoms of arrhythmia are heart palpitations, which are characterized by increased awareness of the contraction of the heart, often accompanied by the hard and irregular beating of the heart.

Unlike CBD, which is non-psychoactive, THC (the most abundant psychoactive cannabinoid in the cannabis plant) is known to cause rapid heartbeat and heart palpitations.

This especially happens to novice users, but also if the user consumes too much THC at once.

Smoking Too Much Cannabis? Here’s How to Overcome It

This occurs because THC significantly lowers blood pressure, which causes the heart to pick up the pace and beat faster.

For a very large percentage of users, CBD doesn’t produce this effect but some people do experience irregular heartbeats and heart palpitations from consuming cannabidiol.

A good example of how rarely this happens is this 2019 study, which analyzed the effects of CBD on people suffering from chronic pain.

This research had 97 patients (30 to 65 years old), and only one of them experienced an increased heartbeat from using CBD.

Patients were using two soft gels per day for 8 weeks, and each soft gel contained 15.7mg of CBD, and 0.5mg of THC.

The woman who experienced a rapid heartbeat reported that the treatment “made her heart race”.

The reasons behind this occurrence are still unknown, but if it happens to you, it’s important to understand the difference between CBD products.

Full-spectrum CBD products have a significant amount of THC, and other minor cannabinoids and terpenes are also present in these products.

If you’re especially sensitive to THC, these types of products can definitely induce a rapid heartbeat and palpitations.

Compared to full-spectrum products, broad-spectrum CBD products have a lesser amount of THC in them, and they also contain minor cannabinoids and terpenes.

Broad-spectrum products are far less likely to induce palpitations, although it’s still possible.

Finally, CBD isolates are the third type of CBD products. They only contain CBD, and nothing else. These products are least likely to cause a racing heart or palpitations.

Full Spectrum CBD vs CBD Isolate: Which Should You Choose?

It’s important to mention that CBD isolates are considered the least beneficial type of CBD products because cannabinoids work synergically in the body.

This synergistic cooperation of different cannabinoids is known as the entourage effect, because the presence of THC and other cannabinoids increases the health benefits of CBD.

Even though some users experience arrhythmia-like symptoms from CBD, an animal study from 2010 found that an acute administration of CBD suppressed ischaemia-induced arrhythmia.

Ischaemia is a restriction of blood to tissues, which causes a shortage of oxygen that is necessary for keeping tissues alive.

The researchers also stated that CBD reduced the size of infarction (tissue death), when it was given at reperfusion injury.

A 2013 review mentioned that current evidence suggests CBD has positive effects on the cardiovascular system, but that clinical research on human participants is required to determine if these positive effects will translate to the human cardiovascular system.

Finally, a 2018 review stated that cannabinoids appear as promising therapeutic agents for cardiovascular diseases.

Conclusion

Since the research on the effects of CBD on arrhythmia (and the cardiovascular system in general) is still in its starting phases, it probably isn’t wise to consume it for these purposes until more is known on the subject.

On the other hand, if you’re experiencing heart palpitations from CBD products, make sure to follow our guidelines regarding different types of CBD products.

If these heart-related symptoms persist, you can also consider lowering the dose or perhaps even discontinuing your CBD regimen.

Why cannabis can make your heart race

For a healthy individual cannabis-induced tachycardia is usually harmless, and knowing more about what cannabis is doing to your body can make you feel better about the unpleasant feeling. (Shutterstock)

One of the most common unwanted side effects of cannabis, a spike in heart rate, also happens to be one of the most troublesome and can even turn new users off from the plant.

“If you don’t explain that it’s possible that you can have a little acceleration of the heart for maybe 5 or 10 minutes and that it’s nothing to worry about,” said Janosch Kratz, MD, on The Cannabis Enigma podcast, “he gets nervous and says, ‘oh God, why did I take this drug.’”

For a healthy individual cannabis-induced tachycardia is usually harmless, and knowing more about what cannabis is doing to your body can make you feel better about the unpleasant feeling.

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So why can cannabis raise your heart rate? Is it dangerous? And what can you do about it? Let’s find out.

How cannabis affects your heart in general

Cannabis has a number of common side effects, ranging from mild ones such as red eyes, dry mouth, or the munchies, to potentially more unpleasant effects such as anxiety, paranoia, and short-term memory difficulties.

These side effects, and how cannabis affects the cardiovascular system, are related to how it modulates what is known as the endocannabinoid system. The endocannabinoid system affects a wide range of bodily functions including hunger, pain, sleep, and energy, to name a few.

The major active chemicals in cannabis — cannabinoids — are able to trigger receptors that control the endocannabinoid system, modifying the function of those receptors and the connected systems, including the cardiovascular system.

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“The interactions of the endocannabinoid system with the autonomic nervous system seem to be the driving force behind the reported cardiovascular adverse events [from cannabis],” wrote a group of researchers who recently reviewed years of cannabis studies 1 .

Why cannabis makes your heart race

The main culprit is widely-considered to be tetrahydrocannabinol (THC), the cannabinoid also responsible for the high of marijuana. (Shutterstock

An increased or irregular heart rate, also known as tachycardia, can be a side effect of cannabis use. In fact, smoking cannabis can lead to a 20-100% increase in heart rate for a couple hours or more after consumption 2 . This is believed to be due to a widening of the blood vessels, which is also responsible for those red eyes people get after using cannabis.

In higher doses cannabis can also lead to a drop in blood pressure, resulting in dizziness and lightheadedness.

The main culprit for these effects of cannabis is widely-considered to be tetrahydrocannabinol (THC), the cannabinoid also responsible for the high of marijuana.

One of the more oft-cited, albeit dated reports states that inhaling cannabis smoke and ingesting THC reliably increases the heart rate by 20-50% over baseline. A lab study carried out on rodents in 1985 further showed that THC significantly alters the levels of catecholamine — hormones that are produced by the adrenal glands and are responsible for the body’s “fight or flight” response — in the bloodstream.

Research has also shown that as one’s tolerance to cannabis increases, the severity of side effects often decreases 3 . This means that side effects commonly seen with inhaled cannabis, including increased heart rate and reduced blood pressure, is not as common in regular users.

It should be noted that almost all studies on the risks of cannabis use are based on people who inhaled marijuana smoke, and that with more and more people now preferring other methods and types of cannabis, these risk assessments should be updated. In other words, like with some other cannabis side effects, the effect on heart rate can be partly attributed to the act of smoking itself 4 .

Could lower THC strains affect your heart rate less?

Since THC is often cited as being responsible for the increased heart rate after cannabis use, one might logically conclude that choosing lower-THC strains — or lower doses in general — would help mitigate it. It would also follow that eating edibles high in THC could produce the same side effects.

Dr. Deepak Cyril D’Souza, a professor of psychiatry at the Yale University of Medicine told NBC news in November, 2020 that he has spent 25 years studying the effects of marijuana and THC and that “in our studies on THC, we found a very robust increase in heart rate and an effect on blood pressure that can be quite profound.”

A 1988 trial found that women given very low-THC (1.8%) joints showed “statically significant increases in pulse rate,” and this increase was more pronounced and lasted longer for participants with a past history of intermittent marijuana use 5 . The trial did not include a control population given a lower dose of THC however.

The most well-known and common strains (more correctly referred to as “chemovars”), high in THC and low in cannabidiol (CBD) and often bred for a strong high and medicinal benefits, are increasingly referred to as Type I cannabis. Type II chemovars have more of a balance between CBD and THC, while Type III chemovars are CBD dominant with little-to-no THC.

All types of cannabis can be used therapeutically, but types II and III tend to allow for better control of THC doses and are often preferred by healthcare professionals due to the reduced risk of side effects. Type III cannabis, despite containing small amounts of THC, is generally considered non-intoxicating.

It is increasingly accepted that CBD, which doesn’t cause an intoxicating effect, can counteract some of the effects of THC. (Shutterstock)

What about CBD?

It is increasingly accepted that CBD, which doesn’t cause an intoxicating effect, can counteract some of the effects of THC 6 . This happens because CBD can actually modify THC binding with certain receptors of the endocannabinoid system.

In other words, using a strain that has less THC or more of a CBD-dominant profile, should — by virtue of containing less THC — produce a less powerful high, and may reduce the anxiety that can commonly accompany a THC high.

As far as the effects CBD itself has on the heart, a 2017 trial found that a single dose of CBD reduced resting blood pressure and helped mitigate stress-induced blood pressure and heart-rate increases 7 .

A 2013 comprehensive published in Frontiers in Psychology looked at CBD’s ability to offset the “adverse psychological effects of THC,” and concluded that “the few studies that exist on the effects of CBD show that this cannabinoid can counteract some of the negative effects of THC.”

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Is sativa or indica worse for your heart rate?

It’s conventional wisdom in cannabis that sativa strains are upbeat and indica strains are mellow and likely to induce the “couch lock” sensation. Countless cannabis consumers use these characterizations to shape their consumption or purchasing decisions

Unfortunately, there isn’t much scientific evidence to support this notion of indica vs sativa as a method of distinguishing between the effects of different types of cannabis. While there are many factors at play in determining why a cannabis chemovar produces certain effects, calling them indica or sativa is not one.

What does matter is the cannabinoid profile of the chemovar (how much THC, CBD, and other cannabinoids) and its terpene makeup. The various terpenes in cannabis not only determine its flavor and aroma, but may also have a big impact on its effects, including how energetic or sedative the high is.

Also, it’s worth keeping in mind that this can be very individualistic. The right dose for one individual can be very different than the right dose for another person, and a strain that makes one person very upbeat and giggly could induce a couch-lock sensation for someone else. And while a specific strain may be very relaxing to one person, another user could experience anxiety or paranoia, but this would not indicate that this is a universally-experienced effect of the cannabis variety in question. The same could be true for increased heart rate.

Is cannabis dangerous for the heart?

If you are a young, healthy person with no history of cardiac illness, then you probably should not be overly concerned about the cardiovascular side effects of cannabis use.

A 2018 review of existing research into marijuana use and cardiovascular risk factors found that there is “insufficient” evidence about how marijuana affects cardiovascular risk factors including stroke and heart attack 8 . The researchers stated that the current literature on the matter is limited by “recall bias, inadequate exposure assessment, minimal marijuana exposure, and a predominance of low-risk cohorts.”

That doesn’t mean that there may not be cause for concern. In fact, there is a substantial amount of data to suggest cannabis may increase the risk of cardiac disease

Researchers in 2014 examined the reporting of cardiovascular complications related to cannabis use and found that they “indicate cannabis as a possible risk factor for cardiovascular disease in young adults.” 9 More recently, a 2017 review discussed “harmful effects of cannabis use including fatal cardiovascular events that could be related to cannabis use,” including but not limited to increased heart rate and blood pressure and a heightened risk of acute coronary events 10 .

Cardiac-related mortality data from the U.S. National Vital Statistics System for 1990-2014 and showed a statistically significant increase of 2.4% in the rate of cardiac death among men following the passage of medical cannabis programs, as well as 1.3% increase among women 11 .

Other research has found that cannabis use is associated with an increased risk of cardiac dysrhythmia 12 , as well as non-fatal stroke, transient ischemic attack 13 , and acute myocardial infarction 14 . Importantly, cannabis users are more likely to be using tobacco products than non-cannabis users, which may contribute to these negative cardiac outcomes.

In general, if you are considering using cannabis, you may want to speak to your physician about the possible side effects, especially if you have a history of cardiovascular issues.

Can you do anything about increased heart rate from cannabis?

When it comes to cardiovascular health and cannabis, many of the same healthy lifestyle principles apply: Try to limit or cut out smoking as an intake method, exercise regularly, eat healthy, and try to get a full night’s sleep as often as possible.

If you find that you often get anxiety or your mind (along with your heart) races when you get high, then consider trying a lower-THC variety, or one that has more of an even balance between THC and CBD. This will help keep your THC dose lower and reduce the likelihood of a racing heart and racing mind.

And when those intense feelings strike, use some tried and true ways to bring your high down a little bit. First off, don’t panic. Remember that the high will wear off before too long, and this isn’t a permanent condition. Try to focus on your breathing, taking deep breaths to help you relax and bring your anxiety down. You can also try to find something funny on the TV, put on an album you love listening to, and when in doubt, raid the cupboard for snacks.

Can CBD Gummies Make Your Heart Race

A racing heart is a scary but common side effect of consuming cannabis. This is due to tetrahydrocannabinol (THC), the cannabis compound responsible for the plant’s euphoric high. But people who consume cannabidiol (CBD) products such as tinctures have also reported heart palpitations, even though these products contain very little or no THC.

Can CBD cause the heart to pound like THC does? Research reveals that this cannabis compound doesn’t negatively affect your heart rate or blood pressure, but scientists are still working to unravel the complex relationship between cannabis and the heart.

How Cannabis Affects the Cardiovascular System

The heart is the most visible member of the cardiovascular system—a sprawling network of veins and arteries that carry nutrient-rich blood to all parts of the body.

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The cardiovascular system is also intertwined with the endocannabinoid system (ECS), a rich network of cell receptors that natural cannabinoids produced by the body, called endocannabinoids, and cannabinoids from outside sources, mainly the cannabis plant, can activate. The ECS works with many other subsystems and processes to support homeostasis, or balance, which is necessary for good health.

Lipid molecules in the cell membranes of the heart and other cardiovascular tissues create these endocannabinoids.

Learning About CB1 and CB2

Endocannabinoids bind to ECS receptors, called CB1 and CB2, throughout the body and brain to support the immune system and regulate many other essential functions—and so do cannabinoids from the cannabis plant. This is why cannabis can have such a wide range of effects.

But the action of the CB1 and CB2 receptors isn’t always positive. And these receptors can behave in different ways in the presence of various cannabis compounds and terpenes. This can make it difficult to determine whether compounds like CBD and THC are actually helpful or harmful in certain situations.

For example, some studies suggest that people who consume whole-plant cannabis have a higher risk of heart disease than the rest of the population. And for all consumers, the risk of a heart attack increases fivefold within an hour of taking cannabis; the risk of a stroke quadruples in that same time period.

On the other hand, taking cannabis can increase the survival rate after a stroke or heart attack and reduce the risk of a potentially serious condition called atrial fibrillation in people who already have heart failure.

How Can Cannabis Cause Heart Palpitations?

When cannabis causes negative effects on the heart and cardiovascular system, THC is the reason.

After consuming a cannabis product that contains THC, some people experience a sudden, rapid heartbeat—an increase of up to 50 beats per minute. This is because THC causes blood vessels to relax and open, which can make blood pressure drop. This forces the heart to beat faster just to keep the usual amount of blood flowing.

A speeding heartbeat after taking marijuana isn’t generally a cause for concern in healthy people, but it can be risky for people who already have some kind of heart or cardiovascular condition.

CBD doesn’t affect the heart and cardiovascular system in the same way, though. It’s a powerful antioxidant and anti-inflammatory agent that works not only with ECS receptors, but also with other systems and processes to support healing and relieve pain.

CBD can also soften the effects of THC by blocking its action on the CB1 receptor. And this provides some protection from THC’s negative effects such as:

  • Anxiety
  • Paranoia
  • Rapid heartbeat

A number of studies over the past decade or so have investigated the effects of CBD on various physiological processes. Researchers have concluded that although individual responses to CBD can vary, CBD-only products don’t cause changes in the cardiovascular system, including blood pressure and heart rate.

Is There A Connection Between CBD & Heart Palpitations?

So, why would someone have heart flutters after taking CBD? One widely disputed study
hypothesized that the reason people taking CBD can have THC-like symptoms is that gastric fluids found in the stomach could actually convert CBD into THC. When this happens, researchers said, THC could enter the bloodstream and affect the body in the same way as THC from cannabis could.

But the 2016 study didn’t use real gastric juices, only an analog—a substance that resembles gastric juices—that scientists use in labs to determine how fast medications could dissolve in the stomach. And the study’s researchers found that under those circumstances, the molecules in CBD did in fact break down into THC.

But later research contradicts their claim that CBD can convert to THC in the stomach. Numerous studies have shown that in natural digestive juices—such as when a person consumes a CBD-infused edible—CBD remains CBD and no traces of THC can be found.

These studies conclude that there’s no evidence that CBD can change into THC in either humans or animals, so there’s no need to worry that taking CBD may cause THC-like effects.

But solving the mystery of having heart palpitations after taking CBD products may take some detective work. Consuming other products that affect heart rate, such as caffeine, at the same time may play a role—so could certain medications.

The Answer Isn’t One Size Fits All

It’s also important to remember that CBD can affect people in different ways, and different products can have their own distinct effects. For example, tinctures enter the body quickly through the mucus membranes in the mouth, while edibles take much longer to work their way through the digestive system and into the bloodstream.

The relationship between CBD and the cardiovascular system is complicated, and scientists are still working to understand it. But the expanding body of research we have tells us that CBD in all its forms has powers to help, not harm, the heart.

Photo credit: eggeegg/Shutterstock.com

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