Yes, full-spectrum CBD products can cause or worsen anxiety in some people. Here’s why it affects anxiety differently and what you can do about it. One editor explains how she took CBD oil every day for a week to help her anxiety, plus the difference between CBD and weed. Learn more here. CBD oil is made from hemp plants. It may help treat pain, anxiety, and seizures. Here is what you should know before trying it.
Can Full-Spectrum CBD Cause Anxiety?
In short: yes, full-spectrum CBD can cause anxiety in some susceptible individuals. Although research has shown that pure cannabidiol (CBD) can relieve anxiety, this isn’t necessarily true for full-spectrum CBD.
If you’re sensitive to THC due to certain risk factors, you can get more anxiety or even a panic attack from taking a large enough dose of a full-spectrum CBD product.
Read on to learn how full-spectrum CBD can cause anxiety and what you can do about it.
Table of Contents
Research on CBD and Anxiety
Unlike its cousin THC, CBD can’t cause anxiety or any other mind-altering effects. On the contrary, multiple human studies have demonstrated that pure CBD can relieve various types of anxiety:
- In a 2011 Brazilian study, CBD capsules improved anxiety caused by public speaking in people with social anxiety disorder (SAD) (1)
- In a similar 2019 Japanese study, pure CBD oil improved anxiety in teenagers with SAD and avoidant personality disorder (2)
- In another 2019 study done in Colorado, CBD capsules improved anxiety scores in almost 80% of the study participants (3)
- The researchers of a 2020 review paper concluded that “CBD has a promising role as alternative therapy in the management of anxiety disorders” which include generalized anxiety disorder (GAD), SAD, and post-traumatic stress disorder (PTSD) (4)
Why Full-Spectrum CBD Can Cause Anxiety
If pure CBD has been shown to relieve anxiety, then why is full-spectrum CBD different?
It’s because full-spectrum CBD is a whole-plant hemp extract. Since hemp is a variety of cannabis that contains small amounts (0.3% or less) of THC, this means full-spectrum CBD can have THC.
THC is the main compound responsible for the cannabis high. Its potential side effects include increased anxiety, paranoia, and panic attacks.
There’s some evidence that THC has a biphasic effect on anxiety, meaning that low doses can reduce anxiety, while higher ones can make it worse (5). On top of that, multiple factors can influence how you respond to THC.
According to research, some people have a higher chance of getting anxiety from THC due to: (6)
- Personality traits
- Infrequent use
- History of previous anxiety reactions
- Presence of anxiety disorders or symptoms
- Basal anxiety levels
- Being female
- The environment and the context in which the THC is consumed
This means that for a minority of people, ingesting even small amounts of THC — such as the kind found in full-spectrum CBD products — can actually cause anxiety, panic attacks, and related side effects.
How Much THC is in Full-Spectrum CBD Products?
Full-spectrum CBD products can legally contain up to 0.3% THC, so roughly speaking, a full-spectrum CBD oil can contain as much as 3 milligrams (mg) of THC per one milliliter (ml) of liquid.
For example, here’s a third-party lab report of a high-quality full-spectrum CBD oil showing that the THC content is about 1.6 mg/ml of oil or about 0.17% (a bit below the 0.3% legal cutoff for hemp).
With this in mind, we can estimate that 1 ml (one full dropper in most cases) of your average full-spectrum CBD oil will contain 1-3 mg of THC. Even if you were to take two full droppers, this would only add up to 2-6 mg. This doesn’t seem like much, and for most people, it isn’t.
But for individuals who are highly sensitive to THC due to the risk factors we discussed earlier, this can be enough to cause or worsen anxiety.
My Experience With Anxiety From Full-Spectrum CBD
I’ve personally experienced an uncomfortable high and anxiety that lasted for 3 hours after taking roughly 80 mg of full-spectrum CBD oil. If I had to estimate, it contained about 3-4 mg of THC.
At first, I was surprised because full-spectrum CBD products had always relieved anxiety for me.
But after doing some research, it made total sense. I’ve smoked cannabis in the past and stopped using it after I began to get anxiety even from a few puffs. I also found many other reports of people who experienced anxiety and even panic attacks from full-spectrum CBD products.
Like other susceptible individuals, I’m so sensitive to THC that even the small amount present in full-spectrum CBD can make me feel anxious.
Using Full-Spectrum CBD for the First Time? Start Low
If you plan on using a full-spectrum CBD product and think it might make you anxious (especially if you have existing anxiety issues), be sure to follow the “start low and go slow” approach to cannabinoids recommended by clinical researchers (7).
Start with a small 5-10 mg dose of CBD and wait for two hours to see the effects. If you don’t notice anything, you can try a higher dose, again stopping for two hours to see if you notice any difference.
Use this method to find the full-spectrum CBD dose that provides you with anxiety relief or whichever benefit you’re looking for.
Alternatives to Full-Spectrum CBD
If you’ve already experienced anxiety from full-spectrum CBD products, you have four options.
First, you can simply lower your dose. In my case, I found that as long as I kept my full-spectrum CBD oil doses below about 70 mg, I still got the calming effects and none of the anxiety.
Another option is to switch to a different brand. After trying various full-spectrum CBD oils I’ve noticed more pronounced THC-related effects from certain brands.
These two choices are ideal because full-spectrum CBD provides the greatest benefits thanks to the “entourage effect” produced by all of the cannabinoids, terpenes, and other active compounds working in synergy (8). So even though THC is the issue, it’s nice to have a little bit for that extra boost to the entourage effect.
But if you want to play things safe, you can also go with broad-spectrum CBD products. This type of extract contains the same ingredients as full-spectrum CBD but removes THC (undetectable traces might remain). This way, you can maximize the entourage effect while avoiding THC.
The last option is to use CBD isolate products, which contain only pure CBD and nothing else. But this isn’t ideal since you won’t be getting the synergistic benefits of all the other cannabinoids and terpenes found in full and broad-spectrum CBD.
Pure CBD can’t cause anxiety because it’s a non-intoxicating compound that has anxiety-relieving effects. However, full-spectrum CBD can potentially cause or worsen anxiety symptoms, depending on your sensitivity to THC.
While most people will be fine, some are so sensitive to THC that even a small amount is enough to trigger anxiety.
That’s why you should always check the third-party lab test reports (called Certificates of Analysis) to see the precise levels of THC in your product.
Keep in mind that although THC comes in two forms, delta-9 and delta-8, we’re mostly concerned about delta-9 because delta-8 is less psychoactive and naturally found in much smaller quantities (unless you’re using delta-8 products).
An example of a third-party Certificate of Analysis (CoA) showing that a full-spectrum CBD oil contains 1.6 mg of THC per ml.
There’s little regulation in the CBD industry, so it’s common for products to contain more or less CBD, THC, and other cannabinoids than advertised on the label.
You should never buy CBD from companies that fail to provide third-party test reports since they help you confirm that the CBD and THC levels are accurate and you’re getting your money’s worth.
Besides, these tests can also verify that there are no contaminants such as pesticides and heavy metals.
Gleb is a freelance writer from Vancouver, Canada specializing in CBD and cannabis. He’s read thousands of studies on CBD and other supplements, helping him translate complex science into plain language. Gleb has tried and reviewed dozens of CBD brands and products, written third-party testing reports, and knows the CBD industry inside and out. When not writing, he likes to kickbox, travel, and tell everyone how awesome intermittent fasting is.
I Took CBD Oil Every Day for My Anxiety—Here’s What Went Down
Dana Myers, LCSW is a licensed clinical social worker and life coach based in Philadelphia. She has a special interest in how race, sex, gender, ethnicity, social status and competencies impact those in marginalized communities and aims to help her clients find purpose and peace in life.
Michelle Regalado is a seasoned editor, fact-checker, and content strategist with expertise in women’s lifestyle news.
When I first learned about CBD oil, I’ll admit I was a bit skeptical. My mind immediately turned to weed and the unnerving experiences I’d had with heightened anxiety in college. For me, a person who’s already predisposed to overthinking, marijuana, no matter what the form, would typically put my mind into overdrive and result in a common yet dreaded side effect: Paranoia. But, let’s back up a bit. What even is CBD?
What is CBD?
A bit of online digging led me to realize that the active ingredient in Charlotte’s Web Everyday Plus Hemp Oil, the product I’d been offered to test, was the chemical compound CBD, which stands for cannabidiol. Unlike THC, the other crucial compound in hemp and marijuana plants, CBD (when derived from the hemp plant) does not produce the psychoactive effects that make you feel “high”; instead, emerging science has hinted that CBD may actually ease anxiety, and therefore, makes you less likely to freak out.
For example, one study comparing the effects of THC and CBD found that, while THC increased anxiety by activating the neurotransmitters involved in the “fight or flight” response, CBD actually repressed autonomic arousal—or the nervous system response associated with sudden increases in heart rate or respiration. In other words, CBD may be ideal for people looking to relax and unwind.
While the science behind CBD’s effectiveness for treating anxiety, pain, and insomnia is still in its infancy, Charlotte Figi’s inspiring story sounds promising. Figi, a 6-year-old girl diagnosed with a rare and resistant form of epilepsy known as Dravet syndrome, was placed on hospice care and given a “do not resuscitate” order when her parents, desperate and frustrated with pharmaceutical medication, considered medical marijuana; specifically, a strain low in THC and high in CBD. Charlotte is now nearly seizure-free since she began supplementing with Charlotte Web’s CBD oil, which the brand named after Figi.
Legal and Safety Things To Know About CBD
The current CBD industry is like the internet’s early years. the Wild West. Legally, speaking, a Harvard Medical School blog post reads, “All 50 states have laws legalizing CBD with varying degrees of restriction, and while the federal government still considers CBD in the same class as marijuana, it doesn’t habitually enforce against it.” With heightened interest around CBD, it’s important to note that because CBD is currently unregulated, it’s difficult to know what you’re getting (whether that’s a tincture—commonly referred to as CBD oil, which is often combined with a carrier oil like coconut oil—topical products like creams and balms, sprays, or capsules), despite product labels and brand promises, the blog post further reads. It’s also important to note that people experience CBD differently. For the most part, the National Institute of Medicine says that while most people can tolerate CBD, side effects do exist. They might include dry mouth, drowsiness, and reduced appetite, among others.
That said, those interested in exploring the potential benefits of CBD should consult with their doctor (especially if you are pregnant, nursing, or currently taking medication) and be mindful of your dosage, writes Consumer Reports. And before you buy, Megan Villa, co-founder of the hemp-focused website and shop Svn Space, told Shape magazine to seek out a certificate of analysis. “Ask for a COA for the batch number of the product you have, since these products are made in batches,” she said. “You need to match the batch number to the COA that pertains to it.” Then, scan the report for potency (i.e. does the number of milligrams of CBD that the product label touts match the lab report?), contaminants and pesticides, and mold (which should live under the “Microbiological Testing” part of the report). Go a step further and note whether the testing lab is GMP (Good Manufacturing Principles) certified, and whether the lab is registered with the Food and Drug Administration (FDA). Shape magazine also suggests purchasing CBD products made from domestically-grown hemp, and reading up on the difference between full- and broad-spectrum and CBD isolate.
With that, I threw caution to the wind and asked for a sample. Here’s what happened—including what it feels like—when I took one full dropper of Charlotte’s Web’s Everyday Plus Hemp Oil in the mint chocolate flavor every morning for seven days.
My First Impression
It was actually a bad bout of jet lag after a trip to California that inspired me to finally test out the CBD oil (I’ll admit that my weed-based reservations kept me from trying it for the first few months). Knowing that the oil had also helped people with sleep issues, I squeezed one full dropper of the Everyday Plus oil onto my tongue, per the instructions, and waited.
Thirty minutes later, I was surprised by how subtle the effect was. While I expected a hazy nodding-off effect similar to melatonin’s, the oil simply relaxed my body ever so slightly—my heart stopped pounding against my chest, my legs stopped kicking beneath my sheets, my mind stopped racing. I wasn’t sure if it was the oil or the late hour, but eventually, physical relaxation gave way to mental relaxation, and I drifted off to sleep.
Reflecting the next morning, I was most surprised by the fact that I never felt “high” in any way—there was never a moment of It’s kicking in; I can feel it now like with pain medications or even anti-anxiety drugs. Considering it takes time, consistency, and the right dosage to experience the full effect, I continued taking the oil once a day for the next six days. Here’s what went down.
It Made Me Less Anxious and Edgy
Rather than overthinking a sternly worded email or analyzing a social interaction, I found it easier to recognize the irrationality of these thoughts and actually let them go.
While normally I’d be slightly tripped up by little things like an overly crowded subway car or a full inbox at work, the CBD oil seems to have taken the edge off of my anxiety a bit. Rather than overthinking a sternly worded email or analyzing a social interaction, I found it easier to recognize the irrationality of these thoughts and actually let them go. In some ways, I feel more like myself. With that said, I’ve still experienced some social anxiety when meeting new groups of people—I’d be interested to see what taking the full recommended dose would do.
I’m More Focused At Work
I work well under pressure, but being extremely busy at work has almost made me less productive—I’m constantly distracted by email, Slack, and the people around me, to the point where getting my work done becomes difficult. This week, however, I’ve found it easier to put my blinders on, block out all distractions (especially social distractions), and focus on one task at a time. I think this is partly related to the lessened anxiety—I feel more frazzled and off task when my anxiety is running high. It almost feels like a newfound sense of clarity and calm that enables me to focus.
I’m Falling Asleep Faster
I assume this is also a side effect of feeling less anxious, but I seem to fall asleep faster; within the 20-30-minute range rather than my normal 45 minutes to one hour (or longer). Not only do I seem to be skipping or at least shortening the whole tossing-and-turning phase of my sleep cycle, but I’m able to snap out of the overthinking that often keeps me up at night. Of course, there’s no telling whether a big life event would disrupt this newfound bliss, but I’d like to think it’s helped on a day-to-day basis.
My Experience With CBD
Would I say that CBD oil has fundamentally changed my life? No. But per the Charlotte’s Web website, this is the typical first experience. “Anyone who has ever started a new vitamin or supplement routine knows the short answer to how long it takes to kick in is—’it depends.’ For many newcomers, they’re not sure what to imagine, or some anticipate a huge change right away. For most of us, though, dietary supplements take time.”
With that said, I’m definitely intrigued enough by the subtle effects to continue taking the oil and to possibly up the dosage to the recommended two full droppers of the 30mL bottle per day. Plus, I take comfort in knowing that it’s an all-natural product that’s responsibly grown on family farms in Colorado. Something that’s safe, legal, requires no prescription, and makes me less anxious, less scatterbrained, and more focused? I’m definitely on board.
Explore the World of CBD
Looking to learn more about CBD? These are some of my favorite products to help get you started.
For those new to CBD, Charlotte’s Web recommends this hemp oil. Containing 17mg of CBD per 1mL serving, this CBD oil is also U.S. Hemp Authority Certified. Choose from four different flavors including Lemon Twist, Mint Chocolate, Orange Blossom, and Olive Oil.
Go deep on the subject of CBD with this book that includes case studies, interviews with doctors, an overview of the latest cannabis research, and how scientists are exploring cannabis for various medical uses. There is also an explainer about the difference between CBD products made from industrial hemp versus in a lab, and products made from the whole marijuana plant.
Charlotte’s Web inaugural CBD oil product comes in two flavors; Olive Oil and Mint Chocolate. It’s also its most potent. According to its website, its Original Formula Hemp Extract Oil comes with 50mg CBD per mL.
Gretchen Lidicker puts a lifestyle spin on the world of CBD as the author draws on the “knowledge of leaders in the health and wellness world” to explain why CBD has become a top beauty and wellness trend for top athletes and celebrities. The book also includes recipes and recommendations for how to choose a top-quality CBD product.
This travel-friendly roll-on is packed with CBD and fragrant essential oils, including lavender, bergamot, and chamomile, for an easy de-stress quick fix. The result? “That elusive feeling of wakeful calm,” reads the Sagely Naturals website.
With this book, CBD is explained from A to Z and breaks down the good, bad, and ugly of a fledgling industry that is poised for rapid growth. CBD: 101 Things You Need to Know About CBD Oil covers what it is, why people take it, who it’s for (and who it isn’t for), its myriad forms, and more.
Lord Jones’ High CBD Formula Body Oil combines CBD with organic avocado, jojoba and safflower oils for smooth, hydrated skin. Each bottle has 100mg of CBD.
Charlotte’s Web’s Extra Strength Capsules feature 25 mg of CBD per capsule. The website offers capsules as a convenient and precise way to take CBD—on the go, stash them in your gym bag, pocket, etc.
Byrdie takes every opportunity to use high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial guidelines to learn more about how we keep our content accurate, reliable and trustworthy.
Blessing EM, Steenkamp MM, Manzanares J, Marmar CR. Cannabidiol as a potential treatment for anxiety disorders. Neurotherapeutics. 2015;12(4):825-836. doi:10.1007/s13311-015-0387-1
Shannon S, Lewis N, Lee H, Hughes S. Cannabidiol in anxiety and sleep: A large case series. Perm J. 2019;23:18-041. doi:10.7812/TPP/18-041
CBD Oil Benefits vs. Side Effects
While it may be helpful, it may not be safe for all
Cathy Wong is a nutritionist and wellness expert. Her work is regularly featured in media such as First For Women, Woman’s World, and Natural Health.
Verywell Health articles are reviewed by board-certified physicians and healthcare professionals. These medical reviewers confirm the content is thorough and accurate, reflecting the latest evidence-based research. Content is reviewed before publication and upon substantial updates. Learn more.
Meredith Bull, ND, is a licensed naturopathic doctor with a private practice in Los Angeles, California.
CBD oil is said to have a variety of possible health benefits. It is used as an appetite stimulant, a sleep aid, a treatment for skin conditions like eczema and psoriasis, for relief of pain, to prevent seizures, and much more.
Though derived from cannabis, the same plants grown for marijuana, CBD oil is not he same as pot. But that doesn’t mean that CBD oil is 100% safe. Some possible side effects, like dry mouth, may be fairly minor. Others, like anxiety, are potentially more significant. And certain potential side effects may even make using CBD oil inadvisable for some people.
This article goes over what CBD is used for, the possible side effects, and what you should look for if you choose to buy CBD.
What Exactly Is CBD Oil?
CBD oil is a hemp plant extract known as cannabidiol mixed with a base (carrier) oil like coconut oil or hemp seed oil. CBD oil comes from Cannabis indica and Cannabis sativa plants.
CBD Oil Benefits
People who support the use of CBD claim that CBD oil benefits people with a variety of health problems. CBD oil is said to be good for:
- Drug use and withdrawal
- High blood pressure
- Muscle spasms
- Poor appetite
- Skin conditions like eczema and psoriasis
As CBD has gained popularity, researchers have been trying to study it more. Still, there has not yet been a lot of clinical research focused on finding evidence to back up these health claims.
Here’s a deeper dive into what is known about a few of the purported health benefits of CBD oil.
A 2015 review of research that was published in the journal Neurotherapeutics suggested that CBD might help treat anxiety disorders.
The study authors reported that CBD had previously shown powerful anxiety-relieving effects in animal research—and the results were kind of surprising.
In most of the studies, lower doses of CBD (10 milligrams per kilogram, mg/kg, or less) improved some symptoms of anxiety, while higher doses (100 mg/kg or more) had almost no effect.
The way that CBD acts in the brain could explain why this happens. In low doses, CBD might act the same as the surrounding molecules that normally bind to the receptor that “turns up” their signaling. However, at higher doses, too much activity at this receptor site could produce the opposite effect.
There have not been many trials to look at CBD’s anxiety-relieving effects in humans. However, one was a 2019 study published in the Brazilian Journal of Psychiatry.
For the study, 57 men took either CBD oil or a sugar pill with no CBD in it (placebo) before a public-speaking event.
The researchers assessed the participants’ anxiety levels using measures like blood pressure and heart rate. The researchers also used a reliable test for mood states called the Visual Analog Mood Scale (VAMS).
The men who took 300 milligrams (mg) of CBD oil reported less anxiety than the men who were given a placebo; however, the men who took 100 mg or 600 mg of CBD oil did not experience the same effects.
CBD oil might help people with substance use disorder, according to a 2015 review published in the journal Substance Abuse.
The review looked at the findings from 14 published studies. Nine of the studies looked at the effects of CBD on animals and five looked at the effects on humans.
The researchers reported that CBD showed promise for treating people with opioid, cocaine, or psychostimulant use disorders.
However, the effects of CBD were quite different depending on the substance. For example, CBD without THC did not decrease withdrawal symptoms related to opioid use.
On the other hand, it did reduce drug-seeking behaviors in people using cocaine, methamphetamine, and other similar drugs.
Some experts suggest that CBD could help treat cannabis and nicotine dependence, but more research is needed to provide this theory.
Some studies have suggested that CBD oil may benefit the skin.
A 2020 paper, for example, found that CBD oil may help reduce inflammation, which could be useful for treating a variety of skin conditions including allergic dermatitis, acne, and psoriasis.
Proponents say CBD oil has benefits for people with cancer. Although some studies have shown promise, there have been no large studies proving the benefits of CBD oil as a cancer treatment.
Other studies suggest that CBD might interact with cancer drugs.
If you have cancer and are considering CBD, talk to your oncologist first about whether or not it is safe for you to use.
High Blood Pressure
A 2017 study found that CBD oil may reduce the risk of heart disease because it can lower high blood pressure in some people.
For the study, nine healthy men took either 600 mg of CBD or the same dose of a placebo. The men who took CBD had lower blood pressure before and after experiencing stressors like exercise or extreme cold.
The study also looked at the amount of blood remaining in the heart after a heartbeat (stroke volume). The stroke volume in the men who took CBD was lower than in was in the placebo group, meaning their hearts were pumping more efficiently.
The study suggested that CBD oil could be a complementary therapy for people with high blood pressure that is affected by stress and anxiety.
However, there is no evidence that CBD oil can treat high blood pressure on its own or prevent it in people at risk. While stress can complicate high blood pressure, it does not cause it.
Proponents say CBD oil has benefits as a sleep aid, but research so far is inconclusive.
A 2017 review pointed out that many studies have been small and limited. However, the authors also noted that because cannabinoids seem to have an effect on the sleep-wake cycle, their potential as a sleep aid is worthy of additional research.
In June 2018, the Food and Drug Administration (FDA) approved a CBD oral solution called Epidiolex.
Epidiolex is used to treat two rare forms of epilepsy in children under the age of 2: Dravet syndrome and Lennox-Gastaut syndrome. These are very rare genetic disorders that cause lifelong seizures starting in the first year of life.
Other than for these two disorders, CBD’s effectiveness for treating seizures is not known. Even with Epidiolex, it’s not clear if the anti-seizure effects are from CBD or another factor.
However, there is some evidence that CBD interacts with seizure medicines like Onfi (clobazam) and raises their concentration in the blood. More research is needed to understand the link.
Possible CBD Oil Side Effects
Clinical research has shown that CBD oil can cause side effects. The specific side effects and their severity varies from one person to the next and from one type of CBD to another.
Some common CBD side effects people report include:
- Changes in appetite
- Changes in mood
- Dizziness or fatigue
- Dry mouth
Do not drive or use heavy machinery when taking CBD oil—especially when you first start using it or switch to a new brand. Remember that some products do contain THC, even in small amounts.
Your healthcare practitioner may advise against using CBD oil if you:
- Have liver disease: CBD oil may increase liver enzymes, which is a marker of liver inflammation. Talk with your healthcare provider before taking CBD oil. You may need to have your liver enzymes checked regularly if you decide to use it.
- Have eye issues: CBD oil may also cause eye-related side effects. A 2018 study found that it may increase pressure inside the eyes. For people with glaucoma, this can make the condition worse. Some people also report dry eyes as a side effect of CBD oil.
- Are pregnant or nursing: You should not use CBD oil if you’re pregnant or breastfeeding. Even though the effects of CBD are not fully understood, it does pass through the placenta.
The American Academy of Pediatrics (AAP) further states that pregnant people should not use marijuana because of the potential risks to a developing fetus.
Can CBD Oil Get You High?
CBD oil does not get you high. Although it is from a plant that is in the same family as the marijuana plant, it does not contain tetrahydrocannabinol (THC), the compound responsible for this feeling.
|A component of the hemp plant||Separate plant in the hemp family that contains CBD and hundreds of other compounds.|
|No or trace amounts of THC||Significant amounts of THC|
|Works receptors in the brain, but not those that induce psychoactive effects (e.g., opioid receptors that help control pain, glycine receptors that impact mood control)||THC binds to cannabinoid receptors in the brain to create “high” feeling|
What CBD Oil Can Interact With
CBD oil can interact with medications, including many that are used to treat epilepsy. One of the reasons for this has to do with how your body breaks down (metabolizes) drugs.
Cytochrome P450 (CYP450) is an enzyme your body uses to break down some drugs. CBD oil can block CYP450. That means that taking CBD oil with these drugs could make them have a stronger effect than you need or make them not work at all.
Drugs that could potentially interact with CBD include:
- Anti-arrhythmia drugs like quinidine
- Anticonvulsants like Tegretol (carbamazepine) and Trileptal (oxcarbazepine)
- Antifungal drugs like Nizoral (ketoconazole) and Vfend (voriconazole)
- Antipsychotic drugs like Orap (pimozide)
- Atypical antidepressants like Remeron (mirtazapine)
- Benzodiazepine sedatives like Klonopin (clonazepam) and Halcion (triazolam)
- Immune-suppressive drugs like Sandimmune (cyclosporine)
- Macrolide antibiotics like clarithromycin and telithromycin
- Migraine medicine like Ergomar (ergotamine)
- Opioid painkillers like Duragesic (fentanyl) and alfentanil
- Rifampin-based drugs used to treat tuberculosis
Always tell your healthcare provider and pharmacist about all the medicines you take, including prescription, over-the-counter (OTC), herbal, or recreational drugs.
The interactions between these medications and CBD are often mild and you might not have to change your treatment. However, in some cases, you might have to change medications or space out your doses to avoid a reaction. Never change or stop medication without talking to your provider.
What’s a Safe Dosage of CBD Oil?
There are no guidelines for use, nor is there a “correct” dose of CBD oil. That said, the average dose range is from 5 mg to 25 mg.
Available forms include:
- Tinctures (CBD oil mixed with a base oil)
Which you choose largely comes down to your preference and what you hope to get in terms of effects. For example, putting the oil under your tongue can produce effects more quickly than swallowing a capsule that needs to be digested.
Each product works a bit differently, depending on the form, so it’s important to follow the provided directions.
How to Calculate a CBD Dose
Sprays, gummies, and capsules are easy to use because their doses are pre-measured.
Tinctures are a bit more challenging. Most oils come in 30-milliliter (mL) bottles and include a dropper cap to help you measure.
But some tinctures have concentrations of 1,500 mg per 30 mL, while others have 3,000 mg per mL or more. That means figuring out the exact amount of CBD per milliliter of oil requires a little math.
To determine an exact dose of CBD, remember that each drop of oil equals 0.05 mL of fluid. This means that a 30-mL bottle of CBD oil will have about 600 drops in it.
If the concentration of the tincture is 1,500 mg per mL, one drop would have 2.5 mg of CBD in it (1,500 mg ÷ 600 drops = 2.5 mg).
Safer Buying Practices
Remember that CBD oils are unregulated. There’s no guarantee that a product is what it claims to be on its packaging. You also can’t know for sure that it’s safe and effective.
A 2017 study reported that only 31% of CBD products sold online were correctly labeled. Most had less CBD in them than was advertised, and 21% had significant amounts of THC.
If you are interested in buying CBD products, here are a few tips that can help you make the best choice:
- Buy American: Domestically produced CBD oil might be a safer option than those that have been imported.
- Go organic: Brands certified organic by the U.S. Department of Agriculture (USDA) are less likely to expose you to pesticides and other harmful chemicals.
- Read the product label: Don’t assume that every ingredient on the product label is natural. CBD products can also have preservatives, flavorings, or thinning agents in them. If you don’t recognize an ingredient, ask the dispenser what it is or check online.
Frequently Asked Questions
CBD oil comes in different forms:
- Isolates contain only CBD.
- Broad-spectrum oils have nearly all of the components of the plant (e.g., proteins, flavonoids, terpenes, and chlorophyll), but do not have THC. oils have all the compounds including THC (up to 0.3%)
Alternative medicine practitioners believe that the compounds provide more health benefits, but the is a lack of evidence to support these claims.
Not necessarily. While the names are sometimes used interchangeably, hemp oil can also refer to hemp seed oil, which is used for cooking, food production, and skincare products. CBD oil is made from the leaves, stems, buds, and flowers of the Cannabis indica or Cannabis sativa plant. It should contain less than 0.3% THC. Hemp oil is made from the seeds of Cannabis sativa and does not have TCH in it.
It would be hard to overdose on CBD oil. Research has shown that human tolerance for CBD is very high. One study reported the toxic dose would be about 20,000 mg taken at one time.
It depends on where you live, the type of product, how it was sourced, and its intended purpose (medical or recreational). In many states, you must be 18 or 21 to buy CBD oil. Check your state’s laws.
Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.
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By Cathy Wong
Cathy Wong is a nutritionist and wellness expert. Her work is regularly featured in media such as First For Women, Woman’s World, and Natural Health.