Home Condition Down syndrome

Subscribe Us


Home / Conditions / Down syndrome

Can cannabis help with Down's Syndrome?

Sponsored by

In recent years, parents have reported improvement in children with Down syndrome’s inattention, speech problems, and other symptoms after using CBD oil.

Recent studies suggest that the potential benefits of cannabis-based products in Down syndrome symptoms are due to the involvement of the body’s endocannabinoid system in the disorder. Most notably, researchers have found that people with Down syndrome have excessive endocannabinoid receptor activity in the hippocampus, the part of the brain associated with memory and that blocking this overstimulation may provide cognitive benefits.

There’s also research evidence that cannabis can relieve some symptoms that occur in this condition, such as impulsivity, digestive issues, and seizures. Cannabis may also be able to help by protecting people with Down syndrome from amyloid plaques, which has been linked to the cognitive deficits which also occur in those suffering from Alzheimer’s disease.

Although more human-based studies are sorely needed, current findings highlight the potential of cannabis-based medicines in DS. Here’s what the research says.

How cannabis works on Down Syndrome

The endocannabinoid system (ECS) exists in all vertebrates and helps regulate crucial functions such as sleep, pain, and appetite. The human body produces its own cannabinoids, which modulate and activate its various functions, but as its name suggests, the endocannabinoid system can also be modulated and activated by cannabinoids found in the cannabis plant. Because the entire system was only discovered in the past 30 years, scientists still have much to learn about the myriad ways cannabis affects the human body.

The ECS plays an essential role in cognitive health and function, particularly through the activity of the cannabinoid type-1 (CB1) receptor, which is abundant in the brain. ECS dysfunction has been linked to depression and other neurological disorders, and recent research suggests that the ECS may be also involved in Down syndrome.

For starters, a 2008 study that examined Down syndrome brain tissue found a link between beta-amyloid plaques and the ECS. The brain cells associated with these plaques had increased activity of CB2 receptors and the enzyme FAAH, which breaks down the endocannabinoid anandamide. 

Meanwhile, a 2014 animal study found that blocking MAGL, an enzyme that breaks down the endocannabinoid 2-AG, reduced beta-amyloid levels, and improved long-term memory and some other cognitive deficits in mice with Down syndrome.

A 2019 animal study also made several connections between CB1 receptors and Down syndrome. The researchers examined two mouse models, discovering the following:

  • Down syndrome mice had more CB1 receptors in the hippocampus region of the brain, which is particularly important for memory
  • Blocking CB1 receptors with medication or gene therapy restored Down-related deficits in memory, synaptic plasticity, and adult neurogenesis (the growth of new brain cells in the adult brain)

These findings do not make it clear whether the ECS is actually dysfunctional in Down syndrome or simply acting as a defense mechanism. However, they do suggest that therapies that target the ECS — including cannabis — could potentially improve some symptoms.

Medical studies on Down syndrome and cannabis

There have been no animal or human studies looking at the use of cannabis for Down syndrome. However, there is still evidence that cannabis-based products can improve some symptoms and protect the brain against amyloid plaques that may contribute to cognitive issues in both Alzheimer’s disease and Down syndrome.

For starters, studies show that cannabis may help with some Down symptoms, including impulsivity, inattention, gastrointestinal issues, sleeping problems, and seizures.

One 2017 clinical study found that cannabis-based medication Sativex improved hyperactivity, impulsivity, and other symptoms in people with ADHD. Since difficulty focusing and impulsive behavior is a common issue for children with Down syndrome, this is quite significant.

Furthermore, people with Down syndrome often suffer from gastrointestinal symptoms such as vomiting, diarrhea, abdominal pain, and constipation, and have an increased risk of developing GI disorders. There’s evidence that cannabis can be helpful here as well. For one, a 2015 review of 23 clinical studies concluded that cannabis-based medicines may relieve nausea and vomiting caused by chemotherapy. 

There’s also evidence that cannabis may help relieve other GI symptoms. One 2011 study of people with inflammatory bowel diseases (IBD) found that cannabis was commonly used to relieve symptoms of abdominal pain, diarrhea, and bloating. Similar results were reported by a 2019 study. Additionally, the pain-relieving effects of cannabinoids are supported by a large body of evidence. 

Furthermore, there’s some evidence that the non-psychoactive cannabinoid CBD may help with poor sleep. For example, a 2019 study found that CBD improved sleep issues in 67% of the 72 study participants. 

CBD can also help with the seizures that occur in about 8% of people with Down syndrome. In fact, CBD has been shown to be an effective seizure treatment and CBD-based drug Epidiolex received FDA approval for treating specific seizure conditions including Dravet Syndrome and Lennox-Gastaut in 2018. The research in this area is quite promising, suggesting that CBD may treat a variety of seizures:

Yet another way that cannabis can help with Down syndrome is by protecting the brain against beta-amyloid plaques and neurodegeneration. These plaques may play a role in the cognitive deficits seen during development and aging in people with Down syndromes. The neuroprotective effects of cannabinoids have been demonstrated in several studies:

Lastly, there’s anecdotal evidence that hemp-based (low THC/high CBD) preparations such as CBD oil may improve Down symptoms. In particular, parents of children with Down syndrome have reported improvements in speech (being able to speak more clearly and in longer sentences), attention and focus, mobility (improved ability to walk and play/exercise), and seizures. 

This all amounts to a patchwork of evidence that cannabis-based medicines can help children and adults with Down syndrome by improving some symptoms and protecting against amyloid plaques and neurodegeneration. However, it’s too early to say anything more substantial. More research is needed, particularly human studies of cannabis-based medicines in people with Down syndrome. 

Side effects

Although cannabis shows early promise in the treatment of Down syndrome, it does have some side effects. These tend to vary depending on whether you’re using a THC- or CBD-heavy preparation.

Cannabis Side Effects

Regular, THC-rich cannabis (commonly known as marijuana) can cause dry mouth, red eyes, sleepiness, dizziness, impaired memory and reaction time, and increased heart rate. Some individuals might also experience feelings of paranoia and anxiety.

Meanwhile, CBD-rich preparations (especially those made from hemp), such as CBD oil, have too little THC to cause mind-altering effects. They can cause minor side effects including diarrhea, low blood pressure, dry mouth, lightheadedness, sleepiness, and changes in appetite. However, these effects are unlikely to occur at the doses taken by most people and have only been reported in studies using extremely high doses.

Overall, although cannabis is a relatively safe option with temporary side effects, it’s always best to consult with a healthcare professional before starting treatment.


The Cannigma content is intended for informational purposes only. It is not a substitute for professional medical advice, diagnosis or treatment. Always consult with an experienced medical professional with a background in cannabis before beginning treatment.

About Down Syndrome


Down syndrome is the most common chromosomal disorder. It’s caused when there’s a defect in the cell division that builds the body during gestation, and the baby ends up with an extra copy of chromosome 21. The extra chromosome affects many aspects of a person’s health, including development, intellectual level, and physical appearance.

Every person with Down syndrome is an individual, and their genetics affect them in different ways. Down syndrome commonly causes learning disabilities, intellectual and developmental delays, and cardiac and gastrointestinal disorders.

Down syndrome can affect anyone, both men and women, and it’s very rare for it to be inherited. There’s no known cause for Down syndrome; when it occurs, it’s not anyone’s “fault.” It’s simply something that happens when cell division doesn’t work properly. There’s nothing that anyone can do to prevent Down syndrome from developing.

Down syndrome affects around 1 in every 700 babies born in the US, or 6,000 each year. In the UK, approximately 40,000 people have Down syndrome, or 1 in every 1,000 babies born each year. Across Europe as a whole, around 104,000 babies are born with Down syndrome each year.

The incidence of babies born with Down syndrome increased by about 30% in the US between 1979 and 2003, and in Europe it rose by almost 50% between 1990 and 2015. It’s thought that this is because women are having babies later in life, on average, and the risk of having a baby with Down syndrome increases with maternal age.


Down syndrome affects each person differently. Some people with Down syndrome can live independently, while others have moderate or severe intellectual and developmental disorders and could require long-term care. Some individuals are in good general health, while others have significant or serious heart defects, gastrointestinal disorders, or other health problems. 

Most people with Down syndrome have distinctive physical features, including:

  • Eyelids that slant upwards
  • A small head and short neck
  • A flattened face
  • Ears that are small or unusually shaped
  • A protruding tongue
  • Noticeably short in height
  • Poor muscle tone and unusual flexibility
  • Short fingers, small hands and feet, and a single crease in the middle of their palm
  • Tiny white spots on the iris of the eye, called Brushfield’s spots


It’s common for children with Down syndrome to have a delay in learning how to speak and understand speech. Down syndrome also affects short- and long-term memory, intellectual and cognitive development, and the ability to express and control emotions.


Life expectancy is shorter overall for people with Down syndrome, although recent medical advances have raised it to 60 years or more. Still, people with Down syndrome are more likely to experience certain complications and disorders, and the risk becomes greater as they get older. Common complications for people with Down syndrome include:

  • Gastrointestinal (GI) disorders like celiac disease, heartburn, and blockages in the GI tract.
  • Congenital heart defects affect around half of all children with Down syndrome. They can be life-threatening, and often require surgery in early infancy. 
  • Immune disorders are more likely to develop in people with Down syndrome because of abnormalities in their immune systems. This also raises their risk of developing some forms of cancer, and infectious diseases like pneumonia.
  • Leukemia is more prevalent among young children with Down syndrome.
  • Some people with Down syndrome have atlantoaxial instability, when the top two vertebrae of the neck are misaligned. If someone has this condition, they are at risk of serious injury to the spinal cord.
  • Dementia is more likely to develop among people with Down syndrome, and it develops earlier, around the age of 50. 
  • Obesity, sleep apneas, problems with vision and hearing, dental problems, seizures, and ear infections are all more likely among people with Down syndrome. 


Thanks to advanced prenatal genetic testing, Down syndrome is increasingly diagnosed before birth. Otherwise, the distinctive facial features make it quick to diagnose after birth. A genetic test called chromosomal karyotype analyzes the baby’s chromosomes to check for the appearance of an extra chromosome and confirm the diagnosis.


Down syndrome is caused by an abnormality in the cell division that occurs during gestation, causing an extra copy of chromosome 21. It’s not known what causes this abnormality, and it’s rare for it to be inherited. 

Advanced maternal age is known to be a risk factor for having a baby with Down syndrome, with incidence increasing once the mother is over 35 years old. Parents who have already had one child with Down syndrome are also at greater risk of having another child with the same condition. 

There are 3 types of genetic variations that cause Down syndrome: 

  • Trisomy 21 is the most common type, occurring 95% of the time. This is when someone has 3 full copies of chromosome 21, instead of the usual 2 copies. 
  • Mosaic Down syndrome is a rare form of Down syndrome, when someone has only a partial third copy of chromosome 21. 

Translocation Down syndrome is also rare. It occurs when part of chromosome 21 is translocated, or attached, to another chromosome before or at conception. Someone with translocation Down syndrome has 2 full copies of chromosome 21, plus parts of another copy of the chromosome attached to a different chromosome.


There’s no way to cure Down syndrome, but early interventions and ongoing therapies and learning programs can help people with Down syndrome to lead fulfilling and independent lives. People with Down syndrome will need different types of programs, and different levels of support, at various points in their lives. 

Some common forms of treatment for Down syndrome include:

  • Physical therapy to help with muscle development and walking
  • Speech therapy to help with speech development
  • Occupational therapy to help with general gross and fine motor development
  • Special education support during school, to help with learning disabilities
  • Expert audiologist and ophthalmologist support to treat hearing and vision difficulties


People with Down syndrome might also need medication, therapy, and/or surgery to treat specific medical complications like heart disorders, GI disorders, and immune system disorders.

Leave a comment

Condition Index A-Z