Dr. Genevieve Newton describes the state of the research on cannabis in the treatment of tic disorders and what her young son's experience with cannabis has been like. Cannabinoid (CBD) oil has been a godsend since I found out my son was diagnosed with a tic disorder.
Tic Disorder Management with Cannabis: A Family’s Tale Meets the Science
Shortly after the COVID pandemic hit in Winter 2020, life took a worrisome turn when my youngest son developed a severe motor tic disorder. My healthy son was 10 at the time. He suddenly became plagued with involuntary movements during all his waking hours. The lockdown and home schooling were almost a blessing. It meant that he wasn’t faced with the loss of his usual activities, like playing hockey and spending time with friends. Given the severity of his symptoms, these activities would have been impossible for him to do. Of course, it also raised the possibility that his condition had been triggered by the stress of the pandemic, which hit young people especially hard.
My son received an extensive medical diagnostic work up. He had a comprehensive blood analysis that included tests for strep antibodies (to rule out Pediatric Autoimmune Neuropsychiatric Disorders Associated with Streptococcal Infections) and autoimmune encephalitis. All blood work was normal. He had a normal EEG. He had two MRI’s which showed a large cerebellar subarachnoid cyst and a cervical spine syrinx. But these were deemed as incidental findings that were unrelated to the tics. After an almost a week long stay in a pediatric hospital, we were given a diagnosis of a severe provisional tic disorder. It was deemed to be neuropsychological in origin.
The treatments we were offered were twofold. First we were recommended psychotherapy with a therapist specializing in family health. But my son was unable to sit still to participate in Zoom appointments, so he couldn’t participate in this process. His dad and I worked with the therapist to learn strategies to help with the emotional aspects of this difficult experience, including Emotion Focused Family Therapy. This helped us all to cope better, but it did nothing to reduce the tic severity. I also worked with another therapist who specializes in Cognitive Behavioral Therapy for Tics. She helped me to better understand the disorder and provided support through this difficult period. But because my son was not able to work with her in person, the benefit was limited.
Secondly we were offered drug therapies. These are typically reserved for children experiencing severe tics due to their significant side effect profiles. We began using Clonidine, a first line treatment for moderate to severe tics. 1 It was almost entirely ineffective. Next, we tried Risperidone as a second line treatment. 2 At first the Risperidone was combined with Clonidine. Then Clonidine was discontinued leaving Risperidone as a monotherapy. The severity of the tics did reduce a bit with the Risperidone. But the side effects were awful.
Within ten weeks of starting the medication, my son gained 23 pounds. For a very thin child who weighed 72 pounds at the outset of this ordeal, this was significant. It was also traumatic for him. After doing an extensive review of the scientific literature, I asked his doctor to change our drug regimen from Risperidone to Aripiprazole because there is evidence that it is better tolerated and has comparable efficacy. 3 Unfortunately, it also causes weight gain. Within nine months of starting pharmacotherapy, our son had gained 40lbs. And the medications were also only minimally effective at reducing tic severity.
As our journey continued, so did my search for alternatives. I quickly discovered that cannabis has been used in the treatment of tic disorders for many years. After finding a physician who specializes in the use of cannabis for pediatric neurological disorders, we were given a prescription for a cannabinoid medicine. We started using cannabis concurrently with Aripiprazole about five months after the onset of symptoms. After doing this for two months, we began using cannabis-based medicine exclusively.
I will describe the state of the research on cannabis in the treatment of tic disorders, as well as what we have personally experienced using a variety of different cannabis products.
Tic Disorders, Cannabis, and the Pandemic
Tics are involuntary, repetitive twitches, movements and sounds. There are both motor and vocal tics. There are three tic disorders listed in the DSM-V, including Tourette’s Syndrome, Persistent/Chronic Vocal or Motor Tic Disorder, and Provisional Tic Disorder. Tourette’s syndrome (TS) includes both motor and vocal tics. Those with provisional and persistent type disorders have one or the other. The only difference between persistent and provisional disorders is the length of the condition. In persistent disorders, tics have been present for more than a year. In provisional disorders, tics have been present for less than a year. 4 While my son was initially diagnosed with a provisional disorder, it is now considered a persistent disorder due to its duration.
During the COVID pandemic, there has been an increase in tic-like behavior among young people, especially girls. This condition has been termed Functional Neurological Disorder and is thought to be related to psychological distress. The tic patterns are different from the three previously mentioned disorders listed in the DSM-V. The tics in Functional Neurologic Disorder are also unique in that they aren’t preceded by an urge. 5 Although my son’s condition presented during the COVID pandemic, it did not fit the pattern of this disorder.
What the Literature Says
There are many scientific publications related to the use of cannabinoids in the treatment of tic disorders. A PubMed search using the terms “Tourette’s and Cannabis” yields 80 results, many of which are relevant. A search for “Tic Disorder and Cannabis” yields fewer results. This shows that the bulk of the literature has focused on the TS diagnosis. I will touch on some of the most notable publications related to observational research, clinical trials, and treatment recommendations.
Several observational studies have investigated the association between the use of cannabis and the symptoms of tic disorders. In 2019, researchers in Europe conducted a survey of patients with a history of using cannabis-based medicine to treat TS. They found that many preferred cannabis to pharmaceutical drugs. The majority reported a subjective improvement of tics and associated co-morbidities. The most striking finding was an improvement in quality of life in 93% of subjects. Patients also reported that they preferred cannabis to either nabiximols (a preparation with a specified quantity of specific cannabinoids and other phytoconstituents) or dronabinol (isolated THC). 6 Also in 2019, an Israeli group reported that 38 of 42 TS patients taking medical cannabis reported reduced tic severity, better sleep, and improved mood with treatment. 7 Similarly, a study published in 2017 found that 18 of 19 TS patients using medical cannabis reported that they were “much improved” with the use of cannabis. However, many reported side effects including feeling impaired and experiencing decreased concentration. 8 Unfortunately these studies don’t provide reliable information on the effective doses or the chemical profiles of the cannabis being used.
Several clinical trials have studied cannabis-based medicine in the treatment of tic disorders using controlled conditions. Some of the first studies were published in the early 2000’s by a research group from Germany. Initially, researchers investigated whether treatment with THC impaired cognitive performance in adults with TS. 9 After finding that cannabis didn’t impair cognitive function, a single dose, randomized placebo-controlled trial was conducted in 2002. It examined doses of THC at 5mg, 7.5mg, or 10mg. It was found that tic severity was reduced when the 7.5 and 10mg groups were pooled and analyzed as a single group, as was associated obsessive-compulsive disorder. The changes were correlated to plasma levels of THC, 11-OH-THC, and THC-COOH. 10 The next year, a six-week randomized controlled trial found a slight reduction in tics with THC at levels up to 10mg per day. 11
A more recent 2019 systematic review and meta-analysis published in Lancet Psychiatry concluded that the quality of clinical research evidence on cannabis for TS was low. The resulting findings are considered neutral. 12 An earlier review by the Cochrane Collaboration cited similar methodological concerns. 13 Currently, the CANNA-TICS study is underway which is a high quality, large randomized multicenter controlled trial. It is investigating the effect of nabiximols on tics. 14 Results are expected to be published soon after the time of this writing.
More recently, a new cannabinoid pharmaceutical has been developed called THX-110 that incorporates THC with other compounds. This product is manufactured by Therapix Biosciences Ltd and is “based on Dronabinol” and PEA (an endocannabinoid-like molecule) to “induce the entourage effect”. THX-110 consists of up to 10mg THC with 800MG PEA. 15 In autumn of 2021, results from a phase-2 pilot study of THX-110 found an improvement in tic symptoms in 16 adults with TS over a 12-week treatment period. 16
Because of the extensiveness of research using cannabis-based medicine for the treatment of tic disorders, comprehensive evidence reviews and treatment guidelines are available. A 2019 systematic review of treatments for people with TS and chronic tic disorders concluded that people with tics receiving THC are “possibly more likely than those receiving placebo to have reduced tic severity”. This study also reviewed risk of harm, such as weight gain and sedation. It did not find risk associated with THC treatment, unlike for pharmaceutical drugs like clonidine, risperidone, and aripiprazole. 17
What about treatment guidelines? A 2021 review on the use of cannabis-based medicine in the treatment of TS reported that the European Society for the Study of Tourette Syndrome (ESSTS) and the American Academy of Neurology (AAN) recommend behavioral therapy and pharmacotherapy with antipsychotics as first line treatments for tics. Cannabis-based medicine is classified as “an experimental intervention that should be applied to patients who are otherwise treatment-resistant”. 18 Given the experience of my family, this is a troubling recommendation. There is a high prevalence of side effects associated with the recommended pharmacotherapies. This is not the case with cannabis-based medicine.
There is very limited research on CBD in the treatment of tic disorders. A 2016 case study assessed whether Sativex (10.8mg THC and 10mg CBD) reduced severe motor and vocal tics. Treatment was over a four week period. The treatment resulted in a “marked improvement” in both the frequency and severity of both types of tics. 19 Similarly, a 2019 case report found that a daily dose of 10mg THC with 20mg CBD resulted in a “rapid and highly significant” reduction in tics. 20
While most of the published literature has examined adult patients with tics, a 2019 case report in the journal Medical Cannabis and Cannabinoids looked at the effectiveness of cannabis-based medicine in a pediatric subject. 21 A 12-year-old boy with TS experienced an initial reduction in tics when consuming vaporized THC equivalent to 4.4 mg. When the boy’s condition worsened, oral THC drops were added to the regimen at a daily dose of 12.5mg THC. No adverse events were reported. However, the author noted that treatment with cannabis in pediatric populations should be regarded as a “last-line treatment when well-established treatments have failed to improve tics”. As already mentioned, I would challenge that statement given the high incidence of significant side effects associated with the first-line pharmacotherapies. This general approach is consistent with the reluctance to use cannabis-based medicine as a first line medical therapy.
A study measuring levels of endocannabinoids in the cerebrospinal fluid of adult TS patients found that anandamide (AEA), 2-arachidonoylglycerol (2-AG), and palmitoylethanolamide (PEA) were significantly increased relative to controls. The authors hypothesize that this demonstrates alterations in endocannabinoid system function in patients with TS. This may be either a primary cause or a secondary change resulting from alterations in other systems. 23 A 2004 study investigated whether common polymorphisms in the CB1 gene were associated with TS. The researchers did not find an association in the population studied. 23 However, a 2020 study found a significant association between a CB1 gene variant and TS. 24 These results certainly implicate the ECS in TS, but this remains poorly understood.
CBD has been the primary cannabinoid that has been used for my son’s treatment over the last 15 months. We’ve mostly used oil-based preparations. These have taken several forms, including liquid products, gelcaps, water-soluble preparations, and inhalation. Here’s a breakdown the different modes of administration in regards to our experience:
Oils: Taking an oil preparation can be challenging for a child. At first, we used a broad-spectrum oil extracted from cannabis (not hemp). It had a very strong taste due to the terpene profile. To make it more palatable, I put it in some lemon syrup. Subsequently we moved onto a hemp-derived CBD isolate oil. It had a less diverse chemical profile but was mostly tasteless and odorless. I put the oil into his morning smoothie. Another challenge is the slow onset and poor bioavailability. When taken on an empty stomach, studies have shown that the bioavailability of oil soluble CBD is only about 6%. 25 If taken with a high fat meal, bioavailability goes up fourfold. 26 Peak levels of lipid-soluble CBD also take at least 90 minutes to achieve. 27 Tic severity varies widely during the day, waxing and waning in response to stress and fatigue. Therefore, when there is a flare, it is difficult to use CBD oil treatment because of the slow onset. However, it can be used on a regular dosing schedule. We use CBD oil in the morning as described. After school, he takes a CBD oil gel cap which makes consumption easier if we’re on the go with after school activities.
In our experience, oral CBD oil has only a modest effect on tic severity. The effects are complicated by issues including the “as needed” medicinal effects related to tic severity fluctuation. There is also the difficulty of timing peak concentrations due to limited absorption. However, we have noted an anxiolytic and calming effect.
My son noted that the CBD oil helps him to feel calm and focused in the morning. Our cannabis physician prescribed CBD oil starting at 20mg twice daily, with incremental increases to determine the optimal dose. We found that our optimal dose was 40mg twice daily.
Water-Soluble: Water-soluble CBD has been shown to be absorbed much faster than lipid soluble preparations. In fact, its bioavailability was shown to be 4.5 times greater in a recent pharmacokinetic study. It is also easily dissolved in water and has no taste or odor. In addition, it has a very fast onset and appears in the blood in as little as 15 minutes. 27 This makes it a viable option for treating “tic flares” when they arise.
I live in Canada. It is illegal to ship or transport cannabinoids internationally. There are water-soluble products available in my country. But their cost is extremely high. Also there has been limited research into the safety of nanoparticles. 28 Given my son’s young age, I prefer to err on the side of caution and avoid nano products. There are water-soluble CBD products that are in micromolar size. I have found that these provide a good alternative to lipid-soluble CBD. They have the added benefit of a quick onset and easy incorporation into any food or beverage.
The micromolar CBD products have provided an anxiolytic and calming effect with a modest change on tic severity. Because of the higher bioavailability of water-soluble CBD, a lower dose can be taken. We find that 15mg of water-soluble CBD provides comparable benefits to 40mg of CBD oil as a liquid or in gelcaps. For tic flares, 30mg of water-soluble CBD provides a rapid calming effect.
Inhaled: The fluctuating nature of tic disorders makes therapies with a fast onset a primary goal. This will not be the case with any orally ingested product, although water-soluble products will have a much faster onset than lipid-soluble preparations. Inhaled cannabinoids provide the fastest onset and greatest bioavailability, with an onset and peak within minutes following ingestion. 26 To treat my son’s acute tic flares, we occasionally use a CBD “puffer” that uses the same technology and delivery method as an asthma inhaler. These are metered inhalers which provide a measured dose of CBD, usually less than 5 mg per puff. We use a CBD-only inhaler and find that it provides some relief from the tics and anxiolytic effects at a dose of approximately 10mg.
CBDA (cannabidiolic acid) is the precursor to CBD and the form found in the raw plant. CBDA undergoes degradation to CBD in the presence of heat, light, and oxidants, which begins spontaneously after the plant is harvested. 26 CBDA is more easily absorbed than CBD. CBDA decreases inflammation by inhibiting the activity of the enzyme cyclooxygenase-2 (COX-2) (which mediates the synthesis of pro-inflammatory prostaglandins) and is structurally similar to salicylic acid. 29,30
I became interested in trying CBDA after observing that my son’s tics were greatly diminished when taking Aleve to treat an ear infection. Like CBDA, Aleve is a COX2 inhibitor. Although I have been unable to find any published research looking at either Aleve or CBDA in the treatment of tics, NSAIDS have been found to decrease flares in the related conditions PANS and PANDAS. 31 Unfortunately, CBDA is not widely available outside of the United States. I did have access to it when we spent a few months living in Florida. We found CBDA to be quite effective at reducing tic severity.
In our experience, CBDA does a better job at reducing tic severity but does not have as much of a calming and anxiolytic effect as CBD. But they can be used together to complement each other. We use 10-15mg of CBDA per treatment dose.
As already described, research on using cannabinoids for tic disorders has primarily been focused on using whole plant cannabis and THC. I admit I had an initial reluctance to use THC with my son out of concern over its psychoactive effects. However, we found that he was able to take the initially prescribed dose of 2.5mg THC balanced with 5mg of CBD without any noticeable impairment. But this wasn’t a high enough dose to have much effect on the tics. We found that a dose of 5mg of THC was required for maximum effect. This is a level that induces some noticeable impairment. My son reports his eyes feel heavy and he becomes slightly lethargic. For this reason, we reserve the higher dose of THC only when we are in what I call a “tic crisis”. Also, THC can be balanced with CBD at a 2:1 ratio to reduce some of THC’s psychoactive effects.
We use THC taken in gelcaps, which presents the issue of delayed onset of action and low bioavailability. We have only ever used THC in the evenings for two reasons. First, we want to avoid any potential psychoactive effects in school. Second, my son’s tics are usually much worse in the evening. A more rapid onset of action could be achieved by using an inhalation delivery method. Inhalers are now available with different ratios of CBD and THC, but we have been unable to get one in Canada.
Pediatric Considerations and Product Safety Considerations
Using cannabis-based medication with a child can present challenges. It may be difficult to find a medical practitioner who has experience with pediatric populations. The coordination of care between the cannabis physician and regular pediatrician or GP can be tricky if they are not knowledgeable about these treatments. When we told our GP about our intention to medicate with cannabinoids, she seemed shocked. But she did not attempt to discourage us from doing so. Others may not be so lucky.
There is also a social stigma associated with pediatric cannabis use, which stems from the nearly 100-year prohibition of the plant. We have never had to ask our son’s school to administer cannabinoid medication because our dosing regimen does not require this. But if it does, one should be prepared with the appropriate medical documentation. Sharing this information with other parents can also be tricky. I always preface our son’s use of cannabis-based medication with a clarification that he has a medical cannabis prescription from a physician. I also share some of the research that has been done on cannabis and tic disorders. People with little knowledge about cannabis-based medicine may assume that products such as CBD and CBDA are psychoactive and think you are giving your child something to make them “high”. We should educate and inform others using the best available information.
When purchasing any cannabis product, it’s always important to do your due diligence. This is especially important when administering cannabinoids to children. Only buy products that have undergone third party testing for pesticides, residual solvents, molds, heavy metals, and mycotoxins and avoid unnecessary flavorings. Of course, you should buy products that have been recommended and prescribed by your physician. In Canada, the cannabis market is legalized and regulated which means that all products have undergone safety testing and approval. I always buy products through one of the dispensaries recommended by our cannabis physician. Although I have found on more than one occasion that the prescribed product has been unavailable through the dispensary. When this happens, I’ve had to purchase a comparable product through a government store.
Many people experience tic disorders decreasing in severity over time, especially into adolescence. 32 For us, the four-month period following sudden onset was very severe. Gradually the intensity of the tics lessened. When we started using cannabis-based medicine, we discontinued the use of pharmaceutical drugs. At that point, we found the condition to be quite manageable. My son does experience flare ups, though.
As described by the American Academy of Child & Adolescent Psychiatry, tics can be exacerbated by “anxiety, tiredness, and certain medications”. 33 We have certainly found this to be the case. Any stressful situation can bring on a tic flare. Late nights or early mornings are almost invariably followed by a “bad day” until sufficient rest is achieved. My son has also experienced an exacerbation following a concussion, probably due to the associated neuroinflammation. His most severe increase in symptoms was following the second dose of the COVID-19 vaccine. We managed it with cannabis-based medicine along with over-the-counter anti-inflammatories.
With tic disorders, there are good days and bad days. Sometimes tics flare up when you least expect it. Thankfully, cannabis-based medicine is available in different forms for acute and ongoing treatment. For flare ups, delivery methods such as inhalation or water-soluble preparations provide a faster onset of action. Oils and gel caps can be taken on a regular schedule. CBD and CBDA are non-psychoactive cannabinoids that can help to reduce anxiety and tic severity. THC can be used when tics are more severe. We use a variety of different cannabinoids as our primary therapy and follow different regimens depending on the situation. This has been very effective and most of the time does not cause any side effects.
My family is grateful for the support of physicians who courageously support pediatric populations with cannabis-based medicine.
Dr. Genevieve Newton spent 19 years as a researcher and educator in the field of nutritional sciences. A series of personal health crises led her to discover the benefits of medicinal cannabis, and she soon found herself engrossed in studying the endocannabinoid system and therapeutic applications of cannabis/cannabinoids in mental health, pain, sleep, and neurological disorders. She is the Scientific Director at Fringe, a medical education company that is focused on whole person health.
More By Dr. Newton
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Cannabinoid Oil And My Son’s Tic Disorder
Cannabinoid (CBD) oil has been a godsend since I found out my son was diagnosed with a tic disorder.
In late October of 2016, my 7-year-old son, Lincoln, was diagnosed with Transient Tic Disorder. It’s fairly easy to say that this moment shook me like I’ve never been shook before. I have never been so scared in my life! I’m sure all fathers out there have experienced the hopelessness of having a sick child. It’s excruciating and overwhelming.
Around late August, I’d noticed Lincoln had started this heavy, exaggerated blinking. I didn’t think anything of it, initially, as I used to do the same thing as a kid…and still do occasionally. Back in the day, my parents thought it was some strange habit I’d picked up. Within a few weeks, Lincoln’s blinks had increased in rate and exertion. He’d also started rolling his eyes in really pronounced ways…sometimes so hard that he’d turn his head to the side.
Then, almost suddenly, he was experiencing these episodes that were like seizures. His eyes were rolling back in his head, his tongue would go limp or roll in his mouth. His face would grimace. His hands, feet and limbs would twitch erratically. And he would make these noises…groans, growls and moans. Sometimes he’d whistle or repeat words during these spells.
The episodes would last between 5 and 45 minutes. It was painful to watch. Especially, when he’d come out of the episodes with no recollection of what he’d just experienced. He could not hear us calling his name or feel us holding him while he endured these episodes. He’d snap out of them confused, exhausted and in physical pain.
From September to November, we’d made countless trips to the ER and doctor’s appointments, including spending Thanksgiving in the hospital Epilepsy Monitoring Unit. We were relieved that seizures had been ruled out. But, the thought that the tics were causing this much chaos was unnerving. We also had to remove Lincoln from the school bus and set up a treatment plan with his school, as he was sensitive to loud noise, bright lights and rapid movement. We were also advised that if the motor and vocal tics continued for a year, Lincoln would be diagnosed with Tourette’s Syndrome.
During this entire process, we drastically altered the family diet, eliminating dairy, white sugar and taking meat out of the house, except for one meal on the weekends as sort of a cheat day. We also started a daily essential oil regimen, using doTERRA oils. The Frankincense oil was a major support . Overall, we saw some healthy results and improvement from these changes, especially regarding his ability to sleep soundly.
By this time, I’d already done extensive research on CBD oils and the benefits of medicinal Cannabis. I was strong in my belief that adding the CBD oil would be the completion of our treatment regimen. So, after some convincing of his mom, I ordered the best CBD oil I found during my research. I’m so elated to learn that I was correct.
Lincoln takes one veggie-cap (15 drops) of CBD oil a day. The facial tics, eye rolls and motor tics have essentially dissipated. He has not had an elongated episode in almost two months. His teachers have stated that they have really noticed a difference as well. I couldn’t be happier! An added bonus of not having my son on some medication to treat his symptoms and add toxins to his system, is that the CBD oil was half as much in cost and four times the usage.
I’m a pretty private person, so not many people know the pain and torment that my family has endured throughout this process. I also fought with myself to even share this story. But, I simply could not deny the sheer joy of the results that my son has seen with the use of CBD oil.
I say all that to say this. I’ve never been a huge proponent of legalizing marijuana, as I don’t smoke it. I’ve really just had a “live and let live” kind of approach to it. Now, that I’ve had the benefits of cannabis/hemp directly affect my family, I truly feel that there is a need to treat with what we have been naturally given.