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  • by Nicola Boulton September 02, 2023 9 min read

    Discover the potential of CBD as a treatment for schizophrenia. Dive into the latest research, understand how CBD works, and explore its benefits and risks in managing this complex mental health condition.

    Schizophrenia is a complex and challenging mental health disorder that affects millions of people worldwide. Characterized by symptoms such as hallucinations, delusions, impaired cognition, and emotional disturbances, it can significantly impact a person's quality of life. While traditional treatments exist, many individuals with schizophrenia continue to experience symptoms and side effects that affect their daily functioning. This has led to growing interest in alternative approaches, with CBD (cannabidiol) emerging as a potential candidate for managing schizophrenia symptoms. In this article, we will delve into the latest research to explore the potential benefits and risks of using CBD as a treatment for schizophrenia.

    Understanding Schizophrenia

    Before discussing CBD as a potential treatment, it's essential to have a basic understanding of schizophrenia. This mental health disorder affects the way individuals think, feel, and behave. The exact cause of schizophrenia remains elusive, but it is believed to involve a complex interplay of genetic, environmental, and neurobiological factors.

    Common symptoms of schizophrenia include;


    Individuals may experience sensory perceptions that are not rooted in reality, such as hearing voices or seeing things that others cannot.


    False beliefs that are resistant to reasoning or contrary evidence.

    Disorganized thinking

    Impaired cognitive processes that result in disjointed speech and difficulty organizing thoughts.

    Emotional disturbances

    Fluctuations in mood, including reduced expression of emotions (flat affect) or inappropriate emotional responses.

    Social withdrawal

    Difficulty in forming and maintaining relationships due to a lack of interest or impaired social skills.

    Managing schizophrenia typically involves a combination of antipsychotic medications, psychotherapy, and social support. However, these treatments are not always effective for everyone, and they can come with a range of side effects, including weight gain, sedation, and movement disorders.

    A Glimpse into Cannabidiol(CBD)

    According toSilvestri et al(2015)CBD is a non-psychoactive compound found in the cannabis plant. Unlike its counterpart, tetrahydrocannabinol (THC), CBD does not induce a "high." Instead, it interacts with the body's endocannabinoid system, which plays a crucial role in regulating various physiological processes, including mood, pain perception, and inflammation.

    The potential therapeutic properties of CBD have garnered significant attention in recent years. Research suggests that CBD may have anti-anxiety, anti-inflammatory, and neuroprotective effects. Due to these properties, some scientists and medical professionals have begun to investigate CBD as a potential treatment for various mental health conditions, including schizophrenia.

    The Promise of CBD for Schizophrenia

    Antipsychotic Effects

    Several preclinical studies have indicated that CBD may possess antipsychotic properties. A study published in the journal "Translational Psychiatry" found that CBD could reduce the severity of psychotic symptoms in animal models.

    Anxiolytic Effects

    Anxiety is a common co-occurring symptom in individuals with schizophrenia. CBD's potential to alleviate anxiety may benefit those living with this mental health disorder.

    Neuroprotective Properties

    Schizophrenia has been associated with abnormal brain development and neuroinflammation. Esposito et al (2011) established that CBD may have  neuroprotective properties, which may help mitigate some of these neurobiological factors.

    Fewer Side Effects

    Compared to traditional antipsychotic medications, CBD may have a more favorable side-effect profile, with fewer reports of weight gain and movement disorders.

    It's important to note that while these findings are promising, research into CBD's efficacy for schizophrenia is still in its early stages. Clinical trials involving human participants are necessary to establish its safety and effectiveness fully.

    The Risks and Challenges

    While CBD shows promise, it is not without its risks and challenges when used as a potential treatment for schizophrenia:

    Lack of Standardization

    The CBD market lacks standardized products, which can make it challenging to determine the appropriate dosage and purity for treating schizophrenia. Still, there are a few reputable brands that value transparency and perform third-lab testing for their CBD products.

    Interactions with Medications

    CBD may interact with other medications used to manage schizophrenia, potentially leading to adverse effects or reduced efficacy.

    Individual Variability

    Not all individuals with schizophrenia will respond to CBD in the same way. Factors such as genetics, the severity of the condition, and the presence of other medical conditions can influence its effectiveness.

    Regulatory Uncertainty

    The legal status of CBD varies by region, adding another layer of complexity for individuals seeking it as a treatment option.

    Current Schizophrenia Treatments

    Antipsychotic Medications

    Antipsychotic drugs are the cornerstone of schizophrenia treatment. They are categorized into two main classes: typical (first-generation) and atypical (second-generation) antipsychotics.Typical antipsychotics include medications like haloperidol and chlorpromazine. They primarily block dopamine receptors in the brain and can effectively control positive symptoms (e.g., hallucinations and delusions). Atypical antipsychotics, such as olanzapine, risperidone, and aripiprazole, also target dopamine receptors but have a broader spectrum of action, affecting serotonin and other neurotransmitters as well. They are often preferred due to a reduced risk of extrapyramidal side effects (movement disorders).


    Psychotherapy, especially cognitive-behavioral therapy (CBT), can be an essential component of schizophrenia treatment. CBT helps individuals recognize and manage their symptoms, improve coping skills, and enhance problem-solving abilities.Family therapy is another important form of psychotherapy. It helps educate family members about schizophrenia and teaches communication strategies to improve support and understanding.

    Psychosocial Interventions

    Psychosocial interventions aim to improve an individual's social and occupational functioning. These programs focus on enhancing life skills, vocational training, and social integration.Supported employment and housing programs can be particularly beneficial in helping individuals with schizophrenia lead more independent lives.

    Rehabilitation Programs

    Rehabilitation programs often involve occupational therapy, vocational training, and education. These services aim to help individuals with schizophrenia regain or develop skills necessary for daily living and employment.

    Medication Management

    Managing medications is crucial in schizophrenia treatment. This includes finding the right dosage and type of antipsychotic, monitoring for side effects, and ensuring medication adherence.Long-acting injectable antipsychotics are an option for individuals who struggle with adherence to oral medications.


    In severe cases, hospitalization may be necessary, especially during acute psychotic episodes or when individuals pose a risk to themselves or others. Hospitalization provides a structured environment for stabilization and treatment adjustment.

    Electroconvulsive Therapy (ECT)

    ECT is reserved for cases of severe and treatment-resistant schizophrenia. It involves the controlled application of electric currents to induce seizures, which can have a positive effect on symptoms.

    It's important to note that while these treatments can be effective in managing schizophrenia, they may not work equally well for everyone. Response to medication can vary, and individuals may require different combinations of therapies to achieve the best outcomes.

    Limitations and Side Effects of These Treatments

    Antipsychotic Medications

    Partial Efficacy

    Antipsychotic medications may not completely alleviate all symptoms of schizophrenia, particularly negative symptoms like social withdrawal and cognitive deficits.

    Variable Response

    Different individuals respond differently to antipsychotic medications. Finding the right medication and dosage can be a trial-and-error process.

    Relapse Risk

    Discontinuing antipsychotic medications can increase the risk of relapse, so long-term medication adherence is crucial.

    Side Effects

    Antipsychotics can cause a range of side effects, including weight gain, sedation, movement disorders (extrapyramidal symptoms), and metabolic issues (e.g., diabetes).


    May Not Eliminate Symptoms

    While psychotherapy can help individuals manage their symptoms and improve coping strategies, it may not completely eliminate hallucinations, delusions, or other core symptoms of schizophrenia.

    Not Suitable for All

    Some individuals with severe symptoms or cognitive deficits may have difficulty engaging in and benefiting from psychotherapy.

    Psychosocial Interventions


    Psychosocial interventions can be time-consuming and resource-intensive, making them less accessible for some individuals.

    Effectiveness Variability

    The effectiveness of these interventions can vary, and their impact may not be as significant in all cases.

    Rehabilitation Programs

    Limited Availability

    Access to comprehensive rehabilitation programs may be limited in certain regions or communities.

    Not Suitable for All

    Some individuals with severe symptoms or cognitive impairments may have difficulty participating in rehabilitation programs.

    Medication Management

    Side Effects

    Antipsychotic medications can have side effects that range from mild to severe, affecting an individual's quality of life.


    Medication adherence can be challenging for some individuals, leading to relapses and a lack of symptom control.

    Electroconvulsive Therapy (ECT)


    ECT is often stigmatized and seen as a treatment of last resort.

    Cognitive Side Effects

    ECT can cause temporary memory and cognitive problems, which can be distressing for some individuals.

    It's essential for individuals with schizophrenia and their healthcare providers to engage in open and ongoing communication to address these limitations and side effects. Treatment plans should be individualized, taking into account the specific needs, preferences, and tolerances of the person with schizophrenia.

    Combining CBD with Other Treatments for Schizophrenia

    Combining CBD (cannabidiol) with other treatments for schizophrenia is an emerging area of research and clinical interest. While the potential benefits of using CBD as an adjunctive therapy in schizophrenia management are being explored, it's important to approach this topic with caution and consider both the potential advantages and challenges. Here's an overview of the potential of combining CBD with other treatments for schizophrenia:

    Antipsychotic Medications + CBD

    Enhanced Efficacy

    According to Almeida et al (2013), CBD may have antipsychotic properties and can work synergistically with traditional antipsychotic medications to reduce the severity of positive symptoms like hallucinations and delusions.Combining CBD with antipsychotics might lead to better symptom control and potentially lower the required dosage of antipsychotic medication, reducing the risk of side effects.

    Improved Tolerability

    CBD may help mitigate some of the side effects associated with antipsychotic medications, such as weight gain and movement disorders. This can contribute to better treatment adherence.


    CBD's neuroprotective properties could potentially help counteract some of the neurobiological factors associated with schizophrenia, although more research is needed in this area.

    Psychotherapy + CBD

    Anxiety Reduction

    Spinella et al (2021) established that CBD contains anxiolytic (anxiety-reducing) properties. Individuals with schizophrenia often experience co-occurring anxiety, and combining CBD with psychotherapy may help alleviate these symptoms.

    Improved Coping Skills

    Psychotherapy, such as cognitive-behavioral therapy (CBT), can help individuals with schizophrenia develop coping strategies. CBD's potential calming effects may complement these skills.

    CBD + Psychosocial Interventions

    Stress Reduction

    CBD's ability to reduce stress and anxiety may enhance the effectiveness of psychosocial interventions aimed at improving daily functioning and social skills.

    Enhanced Relaxation

    CBD's calming effects can complement relaxation techniques used in psychosocial interventions, promoting a deeper sense of tranquility and well-being.

    Improved Sleep

    Many individuals with mental health conditions struggle with sleep disturbances. CBD may aid in improving sleep quality, making therapy sessions more effective.

    Cognitive Enhancement

    Some studies suggest that CBD may have cognitive-enhancing effects. This can be particularly valuable in CBT or other therapies that involve learning new coping strategies and thought patterns.

    Reduced Emotional Reactivity

    CBD's potential to regulate emotional responses might be advantageous in psychotherapy settings, where managing emotional reactivity is crucial.


    CBD's potential as a treatment for schizophrenia is an exciting area of research, offering hope for individuals who do not respond well to traditional therapies or experience intolerable side effects. However, it is crucial to approach this topic with caution and consult with healthcare professionals before incorporating CBD into a treatment plan. As research continues to unfold, a better understanding of CBD's benefits and risks in managing schizophrenia will become clearer, potentially paving the way for more effective and personalized treatment approaches for this challenging mental health condition.Top of Form


    Almeida, V., Levin, R., Peres, F. F., Niigaki, S. T., Calzavara, M. B., Zuardi, A. W., ... &Abílio, V. C. (2013). Cannabidiol exhibits anxiolytic but not antipsychotic property evaluated in the social interaction test. Progress in Neuro-Psychopharmacology and Biological Psychiatry41, 30-35.

    Esposito, G., Scuderi, C., Valenza, M., Togna, G. I., Latina, V., De Filippis, D., ... &Steardo, L. (2011). Cannabidiol reduces Aβ-induced neuroinflammation and promotes hippocampal neurogenesis through PPARγ involvement. PloS one6(12), e28668.

    Silvestri, C., Paris, D., Martella, A., Melck, D., Guadagnino, I., Cawthorne, M., ... & Di Marzo, V. (2015). Two non-psychoactive cannabinoids reduce intracellular lipid levels and inhibit hepatosteatosis. Journal of hepatology62(6), 1382-1390.

    Spinella, T. C., Stewart, S. H., Naugler, J., Yakovenko, I., & Barrett, S. P. (2021). Evaluating cannabidiol (CBD) expectancy effects on acute stress and anxiety in healthy adults: a randomized crossover study. Psychopharmacology238, 1965-1977.

    What is CBD?

    CBD, or cannabidiol, is a non-psychoactive compound found in cannabis plants. It is commonly used for its potential therapeutic effects without causing a "high."

    Can CBD help with schizophrenia?

    Research suggests that CBD may help reduce symptoms of schizophrenia, such as psychosis and anxiety, by interacting with the brain's endocannabinoid system. However, more studies are needed to confirm its efficacy.

    How does CBD work for schizophrenia?

    CBD is believed to interact with the brain's serotonin and dopamine receptors, which can help regulate mood and behaviour, potentially reducing symptoms of schizophrenia.

    Is CBD safe for people with schizophrenia?

    CBD is generally considered safe, but it can interact with other medications and cause side effects. It's important for people with schizophrenia to consult their doctor before using CBD.

    What are the side effects of CBD?

    Common side effects of CBD include dry mouth, diarrhoea, reduced appetite, drowsiness, and fatigue. Some people may also experience changes in mood or alertness.

    Can CBD replace antipsychotic medications?

    CBD should not replace antipsychotic medications without a doctor's guidance. It may be used as a supplementary treatment, but traditional antipsychotics remain the primary treatment for schizophrenia.

    How should CBD be taken for schizophrenia?

    CBD can be taken in various forms, such as oils, capsules, edibles, and vapes. The appropriate dosage and method should be determined in consultation with a healthcare professional.

    How long does it take for CBD to work for schizophrenia?

    The effects of CBD can vary, but some people may notice improvements in symptoms within a few days to weeks. Long-term benefits may take longer to manifest.

    Is CBD legal in the UK?

    Yes, CBD is legal in the UK as long as it contains less than 0.2% THC, the psychoactive compound in cannabis. Always purchase from reputable sources to ensure compliance with legal standards.

    What should I consider before using CBD for schizophrenia?

    Before using CBD, consider potential interactions with other medications, possible side effects, and the quality of the product. Always consult with a healthcare provider to determine if CBD is appropriate for your condition.

    Nicola Boulton
    Nicola Boulton

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