Side Effects Of Too Much CBD Oil


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How much CBD do I take? Because CBD is so new, this simple question is more common than many think. Dr. Leslie Mudd, PharmD is here to help! Wondering what will happen if you take too much CBD? Read this article by Envy CBD to learn the side effects of too much CBD and the chance of CBD overdose.

Can You Overdose on CBD Oil? Ask a Pharmacist

In December of 2018, the Farm Bill legalized cannabis plants with less than 0.3% THC, otherwise known as hemp. This change in federal law was the beginning of the cannabinoid boom in the United States. Since then, CBD sales have taken off and now you can find CBD in dedicated stores and boutiques, health food and supplement stores, and even gas stations and truck stops.

In 2019, a group of physicians looked at over 35 studies of CBD products being used in a medical context. The dose of CBD for the studies ranged from less than 1 mg/kg of body mass to more than 50 mg/kg of body mass. Despite the large doses of CBD in the studies the doctors saw no serious adverse effects of CBD. People who did take the larger doses did not become sick in any way. They did show some signs of sedation or calm.

  • 1) Can CBD Oil be Addictive?
  • 2) Can You Build a Tolerance to CBD?
  • 3) Can Human Overdose on CBD Oil?
  • 4) Can Animals (Dogs or Cats) Overdose on CBD?
  • 5) Effective Dosing of CBD for People
  • 6) Does CBD Oil Have Side Effects?
  • 7) Effective Dosing of CBD for People
  • 8) Does CBD Oil Have Side Effects??
  • 9) Choosing a CBD Oil Brand You Can Trust
  • 9) Why Cornbread Hemp?

The World Health Organization (WHO) has decided that CBD is safe for human consumption and does not cause overdose or addiction. But the FDA has not agreed with the WHO’s assessment. The US federal government has continued to place limits on CBD studies via federal drug laws.

Can CBD Oil be Addictive?

No, CBD is not addictive, and that lowers the risk of taking too much. CBD does not produce the euphoric “high” associated with THC-rich marijuana, which further lowers the risk of overdosing on CBD.2 People with a history of substance abuse are not going to get the same “high” feeling or experience with CBD as with hard substances. It is very unlikely that even people who have addiction issues will become dependent on CBD.

While CBD has wellness and health benefits, it is not habit-forming with little risk that someone might overdose on CBD.

Can You Build a Tolerance to CBD?

It does not appear that people develop a tolerance for CBD, but more research is needed. 4

Anecdotally, however, some people claim that CBD has less of an effect on them than it did previously, or that it took longer to work, which could be an indication of tolerance. An easy way to address this issue is to begin taking your CBD at a different time of day, taking a short break, or consuming CBD less regularly and only to address a specific issue.

If you are a regular user of marijuana products, you might experience CBD differently. There is a possibility you could build a tolerance under those circumstances.

If you’ve been using CBD isolate or broad spectrum CBD products you may find an improved experience when switching over to a full spectrum CBD product made from Flower-Only™ hemp extract. These contain the entire field of cannabinoids and terpenes, many of which work best when they work along side CBD and THC.

Can Humans Overdose on CBD Oil?

The term “overdose” can have a few different meanings. Some types of drug overdoses can result in death, like heroin, cocaine, sleeping pills, or prescription opioids. However, the term “overdose” can also mean simply just taking more of a substance than originally intended or as directed, no matter what the substance is.

The research is very clear. The clinical trials on CBD users used different doses and different forms of CBD (oils, gummies, etc). They took into account several variables in the results including weight, diet, sex, and age. No overdoses occurred. Much more study of CBD and its properties is needed.

You can accidentally take more than the recommended dose, but the side effects of such a mistake are very minimal. You might find yourself more sleepy than usual. If you have a sensitive stomach, CBD could give you an upset stomach ache or even diarrhea. 6

Can Animals (Dogs or Cats) Overdose on CBD?

Research indicates that our pets respond to CBD in much the same way we do. All animals have cannabinoid receptors in their endocannabinoid systems. 7 Most animals require a smaller dose than humans do (although there are some massive dogs that outweigh people), but even if you get the dosage wrong the worst side effects of CBD include an upset stomach and sedation.

CBD dosage is based on the bodyweight of your pet. So it would not be recommended to give a Great Dane and a small house cat the same dose of CBD. The Great Dane won’t get the desired effects of CBD, and the cat will probably be extra sleepy and lethargic.

Pets who use CBD might experience all sorts of benefits including relief from conditions like aches and pains, daily stress, and a poor sleep cycle8. Aging dogs and cats can try oil for their joints. It’s a low-risk option to increase their quality of life. CBD oil could also be great for animals with stress or anxiety issues. Try it out during the next thunderstorm or fireworks show.

If a pet consumes too much CBD oil the most likely adverse effects include: lethargy, vomiting, and incontinence. For an ideal dosage for CBD pet products to avoid these side effects, visit Cornbread Hemp’s CBD dosage guides for dogs pet owners of dogs, and CBD guide for cats. The best practice for giving your pet CBD is buying a CBD oil that was made for animals in mind. These have an adjusted strength and flavor that will appeal to your pet.

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Still concerned about getting the dose right for your furry friend? Look for the nearest holistic veterinarian in your area. They’ll be able to give you more specific information about your pet and CBD.

Effective Dosing of CBD for People

In the end, we want to know how to get the most out of our CBD. Researchers are still searching for answers to all of these questions. There are several things to consider when trying to figure out the right dose.

One of the things to consider is how you are taking CBD. If you are taking gummies or capsules those are ingested and must pass through portions of your digestive system before taking effect. There are some preparations of CBD that work best this way, especially accompanied by a high-fat meal.

Another thing to consider is your own personal history with CBD, THC, and cannabis. If you don’t have any experience whatsoever, start slow. First-time users of CBD should start with a lower dose, we recommend 25mg per serving. If you are more experienced with CBD and THC you may already know how CBD makes you feel and might be tempted to be more generous with the amount of CBD, but keep in mind the quality of CBD you have experience with. If you were using a CBD isolate for years and are now considering switching to Full Spectrum CBD or Whole Flower CBD to get a better result, we recommend you reduce your dose slightly the first few times, then adjust as needed.

Best practice is to always follow the instructions on the label of the CBD product. To learn more about specific dosing, check out our CBD dosage guide. CBD has no intoxicating effects, so there is no reason to take more than indicated. 9 CBD works best when taken consistently, if you need help keeping track try out this free CBD Relief Journal!

Effective Dosing of CBD for People

The real question is not about overdose—but about an effective CBD dose. How much CBD do you need to take to achieve the outcome you desire? What is the best CBD dosage? CBD taken orally is subject to digestion. Does it matter if CBD is taken with or without food? Some CBD preparations are better absorbed with a high fat meal. Is there anything else in the CBD that might affect how it works or how CBD makes you feel? Researchers are still looking for the answers to these questions and more.

Follow the instructions on the label of the CBD product. CBD has no intoxicating effects, so there is no reason to take more than indicated. 9 If you are taking the product on the advice of a healthcare provider, follow those orders. If you are concerned about the safety and side effects of other medications taken with CBD, make sure to contact your pharmacist for a drug interaction evaluation.

We recommend to most CBD first timers to start with a daily dose of 25mg of CBD per day. Our products are designed to easily measure 25mg per serving, with a graduated glass dropper that has four equal parts with coinciding lines. With the addition of our 1,500 mg CBD oils, Cornbread Hemp customers can now enjoy a 50mg CBD serving size per dropper of CBD oil, or four equal parts at 12.5mg of CBD.

Does CBD Oil Have Side Effects?

Similar to the side effects of the cannabis plant, using too much CBD can cause dry mouth and sleepiness. In the worst cases, it can result in a stomach ache or incontinence. 10 If you notice any change in your heart rate, lowered blood pressure, or blood circulation, or if you develop headaches, be sure to consult your doctor.

It’s important to understand that full spectrum CBD extract is neither a drug nor candy. CBD is considered by many health care practitioners to be a dietary supplement, much like fish oil. Please also note that full spectrum CBD does contain THC, meaning you can test positive on a drug test. and employers can still choose to fire you for a positive result.

Choosing a CBD Oil Brand You Can Trust

High-quality, trustworthy CBD can be difficult to find. Some CBD brands sell products that have contain dangerous contaminants like pesticides and heavy metals. One report suggests that 70% of CBD products contain dangerous contamination. 11

Trustworthy CBD brands will be USDA certified organic and have their third-party lab tests easy to find. Avoid any company that isn’t transparent about product quality. All oils made by Cornbread Hemp come with a QR code on the box that will take you directly to the lab results of your specific product batch.

Quality CBD oil comes from quality organically farmed plants. Hemp is a natural bio-accumulator, meaning it naturally absorbs much of the nutrients, toxins, and other elements in the soil that surrounds it. This is why keeping it in a crop rotation and avoiding all pesticides is important. This not only makes it a better product for you to consume, but it’s great for the environment too.

Why Cornbread Hemp?

Since the Farm Bill of 2018 passed Congress, you can find CBD products everywhere from gas stations to health food stores and pharmacies. Many of these products were rushed into production without regard to quality but with so many brands it’s hard to tell which one to trust.

By committing ourselves to using only the highest quality, pesticide-free organic Flower-Only hemp extract, and by administering third-party lab tests, Cornbread Hemp ensures that our customers receive the safest and most effective organic CBD oil available on the market, or your money back. We recommend that you do your own research on CBD products, in part by reading the over 3,000 reviews about CBD on the Cornbread Hemp website.

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About the Author

Dr. Leslie Mudd, PharmD

A board certified oncology pharmacist with 25 years experience at the James Graham Brown Cancer Center in Louisville, Kentucky, Dr. Leslie Mudd now serves as the Cornbread Hemp resident pharmacist and medical expert. Read Dr. Mudd’s full author bio here.

Does CBD Get You High FAQ’s

Can CBD oil get you high?

No, CBD oil does not get you high. Full spectrum CBD oils contain trace amounts of THC that must be below 0.3% by law. That’s not nearly enough THC to get you high. However, you might notice that you feel less stressed when taking CBD, or that you fall to sleep easier at night.

How does CBD oil make you feel?

Most people who take CBD report being less stressed out in everyday situations, having a healthier sleep cycle, and even relief from aches and pains. However, this is dependent upon what type of CBD oil you are taking, and if it contains a full spectrum of cannabinoids, or just CBD isolate.

How much CBD is too much?

Most people take between 25mg and 100mg of CBD per day, but it’s safe to take as much as 3-4mg per 10 pounds of body weight. Depending on your health issues, you will need to experiment with different doses of CBD to find the one that works best for your needs.


1) Millar SA, Stone NL, Bellman ZD, Yates AS, England TJ, O’Sullivan SE. A systematic review of cannabidiol dosing in clinical populations. Br J Clin Pharmacol. 2019;85(9):1888-1900. doi:10.1111/bcp.14038. Table 1, Table 2, and Table 3.

2) Devinsky O, Cilio MR, Cross H, et al. Cannabidiol: pharmacology and potential therapeutic role in epilepsy and other neuropsychiatric disorders. Epilepsia. 2014;55(6):791‐802. doi:10.1111/epi.12631. 5th paragraph

3) Babalonis S, Haney M, Malcolm RJ, et al. Oral cannabidiol does not produce a signal for abuse liability in frequent marijuana smokers. Drug Alcohol Depend. 2017;172:9-13. doi:10.1016/j.drugalcdep.2016.11.030. Under “Discussion” heading 2nd paragraph.

4) Iffland K, Grotenhermen F. An Update on Safety and Side Effects of Cannabidiol: A Review of Clinical Data and Relevant Animal Studies. Cannabis Cannabinoid Res. 2017;2(1):139-154. Published 2017 Jun 1. doi:10.1089/can.2016.0034. Under the heading “Acute Clinical Data,” 1st paragraph

5) Bergamaschi 2011. Page 3, paragraph 8

6) Iffland K, Grotenhermen F. An Update on Safety and Side Effects of Cannabidiol: A Review of Clinical Data and Relevant Animal Studies. Cannabis Cannabinoid Res. 2017;2(1):139-154. Published 2017 Jun 1. doi:10.1089/can.2016.0034. In the “Results” section of the abstract.

7) Institute of Medicine (US); Joy JE, Watson SJ Jr., Benson JA Jr., editors. Marijuana and Medicine: Assessing the Science Base. Washington (DC): National Academies Press (US); 1999. 2, Cannabinoids and Animal Physiology. Available from: Under the heading “Value of Animal Studies,” 1st paragraph

8) Silver RJ. The Endocannabinoid System of Animals. Animals (Basel). 2019;9(9):686. Published 2019 Sep 16. doi:10.3390/ani9090686. Under the heading “The Endocannabinoid System,” 4th paragraph

9) Iffland K, Grotenhermen F. An Update on Safety and Side Effects of Cannabidiol: A Review of Clinical Data and Relevant Animal Studies. Cannabis Cannabinoid Res. 2017;2(1):139-154. Published 2017 Jun 1. doi:10.1089/can.2016.0034. Under “Introduction” heading, 1st paragraph

10) Millar SA, Stone NL, Bellman ZD, Yates AS, England TJ, O’Sullivan SE. A systematic review of cannabidiol dosing in clinical populations. Br J Clin Pharmacol. 2019;85(9):1888-1900. doi:10.1111/bcp.14038. Table 1, Table 2, and Table 3

What Would Happen If I Took Too Much CBD?

Since the Farm Act of 2018 lifted the Federal ban on hemp production, CBD seems to have taken over the country and people everywhere are discovering its numerous benefits. You can walk into almost any store and find CBD products with endless ways to use them. You can eat CBD, drink it, vape it, dab it, smoke it, rub it into your skin, add it to your favorite snacks, and even give it to your pets!

CBD products are so easy to consume that some people are worried about how much is too much. What happens if you accidentally (or deliberately) take too much CBD? Is CBD overdose a thing? After our In-Depth Guide to Tincture Dosing article, we will explain what happens if you take too much CBD.


Cannabidiol, or CBD, is a naturally-occurring cannabinoid most commonly found in hemp and cannabis plants. Hemp differs from cannabis and lacks a sufficient amount of THC, the psychoactive compound that makes its users feel high. Like THC, CBD binds with cannabinoid receptors throughout the body to activate the Endocannabinoid System (ECS). The ECS affects numerous mental and physical functions, including pain, memory, mood, appetite, stress, sleep, metabolism, immune function, and reproductive function.

Concerning the legality of CBD products, the Federal government allows the production of industrial hemp but does not necessarily legalize CBD specifically. This legal gray area gets more confusing as some state laws can either allow CBD entirely or ban it altogether. Check out our CBD Legality broken down state-by-state for more information on state laws.


Given the relatively loose legality of CBD products and how easy it might be to mistake hemp-derived CBD for a cannabis-derived one, concern about CBD overdose and taking too much CBD is warranted.

On a molecular level, hemp-derived CBD products don’t possess enough THC to create such a response. CBD’s chemical properties do NOT include psychoactive elements in the same way that THC does. So if you do take too much CBD, what you’ll experience will be caused by the THC content in the product. This likely means that you’re not consuming a hemp-derived CBD product but a cannabis-derived one.

The typical adverse effects of THC products include, but are not limited to:

  • Mental Slowness
  • Accentuation of Anxiety and Depression
  • Decreased Memory Retention

If cannabis-derived CBD products can not cause an overdose, what happens if you take too much CBD if it’s hemp-derived? The answer should be obvious – it’s even less likely for these products to leave you in an uncomfortable position. CBD doesn’t directly react with receptors responsible for respiratory and cardiac functions. Even the World Health Organization declares CBD non-toxic. So you won’t die from CBD overdose if you take too much CBD.

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Due to Federal prohibition, there is not enough early research on the subject, with pro-cannabis studies often being suppressed. The published studies suggest a dosage upwards of 200mg of CBD per kilogram of body weight administered intravenously. Recent research believes this dosage is much higher, exceeding 10,000mg/kg (nearly 700 grams) per serving.

To knock this CBD overdose theory on its hand, products with that high concentration don’t exist as there is no reason to. According to the bioavailability of CBD, the average range sits between 6% and 35%. So if you take too much CBD, more than your body can handle, you will only pass it through.


While a high dose of CBD does exist, the likelihood that you’d accidentally (or voluntarily) take an intravenous administration of 700 grams of CBD in one sitting is improbable. However, it is worth noting that too much CBD does not go without its side effects. Should you exceed 1500mg of it, the side effects include:

  • Diarrhea
  • Fatigue
  • Changes in Appetite
  • Nausea
  • Anxiety
  • Dry Mouth

These effects, while uncomfortable, will often pass within 4-8 hours and not lead to CBD overdose. Don’t panic or stress yourself out in these situations. Make sure to drink plenty of fluids, and if your appetite allows it, eat something! Physically, you will be fine, so find a good way to distract your mind. Taking a walk can help. If you feel too ill to move, put on a good movie and try to relax. If you’re too tired, make yourself as comfortable as possible and sleep it off.


Where you buy your CBD from plays a large part in proactively regulating your dosing and helping you avoid taking too much CBD. The media is pretty on top of things when publicizing negative coverage towards a particular event or product. This negative coverage steadily picks up as hospitalizations from low-quality vape cartridges to mislabeled products overpower public perception. While these incidents are isolated, they still put a negative image of CBD products in the typical American’s head. In addition to that, shady counterfeiters are making fake CBD oil using synthetic cannabinoids, like those found in Spice and K2.


One of the first things you can do to proactively find the right product and not accidentally take too much CBD is to research the source of your CBD – hemp! When it comes to Envy’s products, 100% of our hemp is grown in the USA by farms that DO NOT use pesticides. We DO NOT use artificial light to simulate “perfect world” conditions. Instead, our farms are all outdoor, using the sun and organic practices to cultivate a healthy yield of hemp.

After cultivation, we use Supercritical CO2 Full Plant Extraction, which is considered the safest and most efficient way to extract CBD and retain the entire molecular structure. To filter out the THC, lipids, wax, and other undesirable plant matters, we remove them under a state-of-the-art chromatography process. The process is like peeling an orange where the skin is the unwanted compounds such as THC, and the rest is the CBD, other cannabinoids, and terpenes. Upon peeling the orange, is everything else still an orange? That is what Full Plant Extraction with a chromatography process is.


The first thing you see with a CBD product is its packaging. Does the information on the label tell you the exact ingredients in the product and how you should use it? Or does it just say CBD and expects you to trust that? Ultimately, you are putting this stuff into your body. So knowing what that entails should be clear for you to avoid taking too much CBD and give in to the CBD overdose myth. A few things to look for include:

  • 3rd party lab tests
  • Amount of active CBD per serving
  • Supplement fact panel, including a list of ingredients
  • Net weight
  • Manufacturer and distributor names
  • Suggested use
  • Clear indication of the type of CBD (full spectrum, broad spectrum, or isolate)
  • Batch or date code

Luckily for you, all Envy’s full spectrum CBD products have the necessary information so you can make an informed decision on whether our products will help you steer clear of taking too much CBD. You can find our full panel testing results on our website for each product. We also include supplement facts, directions on how to use and under which circumstance(s), distribution information, and clear indications that ALL our CBD products contain what we advertise. After all, our mission is to provide the means for everyone to take care of themselves. To help you do that, we start by building trust and transparency between you and us.


CBD products are more in demand than ever, and their benefits can help return you to a state of being in control over your health and wellness. To help you regain this control, it is in your best interest to educate yourself on the side effects of taking too much CBD and the possibility of CBD overdose. While the side effects are similar to those of other treatment options, you need to understand that experiencing anything beyond temporary discomfort while taking too much CBD is unlikely. Nevertheless, to help minimize the likelihood of this discomfort, we recommend you do your research on the company and its products before making the decision. And if you’re looking for something pesticide-free and organic, we suggest you see our vast collection of CBD products.

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