Psilocybin vs. Ketamine Therapy: Exploring the Benefits of Psychedelic Treatments

Updated
June 29, 2023
Edited by Ben Smith
Last Updated:
May 2, 2024
Detailed image of a medicinal vial against a psychedelic backdrop, representing psychedelic medicine's role in treatment.

The world of mental health treatments is ever-evolving. In recent years, there has been a push to explore alternative therapies such as psilocybin and ketamine therapy. While both treatments have shown promise in treating various mental health conditions, it is important to understand their differences and potential benefits. 

What is Psilocybin Therapy? 

Psilocybin is a naturally occurring psychedelic compound found in certain mushrooms. It has been used for centuries in spiritual ceremonies and rituals, but more recently has been studied for its therapeutic effects on mental health conditions such as depression, anxiety, addiction, PTSD, end-of-life anxiety, and more.  

The science of psilocybin is complex and not fully understood yet. However, research suggests that it works by modulating serotonin levels in the brain, which can lead to improved moods and increased emotional regulation. Additionally, psilocybin can increase neuroplasticity which may help with cognitive functions such as memory formation and problem-solving skills [1].  

The potential benefits of psilocybin therapy are numerous. Studies have found that it can significantly reduce symptoms of depression and anxiety[2]. Additionally, it has been shown to reduce cravings in people with substance use disorders and help those with end-of-life anxiety come to terms with their mortality [3]. The therapeutic effects of psilocybin tend to last weeks or months after one session making it an attractive option for those looking for long-term relief from their symptoms without the need for ongoing treatment sessions or medication management. 

What is Ketamine Therapy? 

Ketamine is a dissociative anesthetic drug most commonly used in medical settings but also known for its recreational use as “Special K” or just “K”. It has recently gained attention as a potential treatment for severe depression due to its rapid onset of action compared to other antidepressants, which can take weeks before they start working effectively. 

The science of ketamine is thought to involve glutamate receptors in the brain, which can lead to improved moods within hours after administration [4]. Additionally, ketamine may be able to increase neurogenesis (the growth of new neurons) which could be beneficial for cognitive functions such as memory formation and problem-solving skills similar to what is seen with psilocybin therapy [5]

The potential benefits of ketamine therapy are largely similar to those seen with psilocybin therapy, including reduced symptoms of depression and anxiety as well as decreased cravings in people with substance use disorders [6]. Ketamine can also improve quality-of-life in those dealing with end-of-life anxiety issues [7]. The main difference between ketamine therapy and psilocybin therapy is that ketamine tends to have shorter-lasting effects, so multiple sessions may be necessary over time, while one session may be enough with psilocybin depending on the condition being treated. 

Comparison of psilocybin therapy and Ketamine therapy

Both psilocybin and ketamine have been found to produce rapid antidepressant effects with long-lasting results when administered under appropriate clinical supervision by trained therapists or physicians. However, some important differences between them should be taken into account when considering either one for treatment purposes. 

The primary difference between these two substances lies in their duration of action; while psilocybin’s effects last up to 8 hours, ketamine’s only last up to 4 hours. This means that psilocybin requires more time for preparation before use than ketamine; however, it also allows for more time for integration after the session is complete (a process that can take days or weeks). 

Additionally, because psilocybin produces more intense psychological experiences than ketamine (primarily a dissociative drug), it may require additional preparation to ensure safety during the session and, afterward, during the integration period. 

Current State of Research 

The current state of research into both psilocybin and ketamine therapy is rapidly evolving. However, there are still many unanswered questions about both treatments’ efficacy and safety profiles that need further exploration before either one can become an accepted mainstream medical practice.

As far as research into psilocybin therapy, recent studies have shown promising results in treating depression, anxiety disorders, addiction issues, PTSD symptoms, end-of-life distress symptoms, and pain.

With regard to ketamine therapy, numerous studies have demonstrated its effectiveness in treating depression and treatment-resistant depression within hours instead of weeks (as opposed to traditional antidepressants) [6]. However, due to its potential side effects like dissociation, further research needs to be done before it can become even more widely accepted as a treatment for additional mental health issues like depression or anxiety disorders. Despite this, we still see numerous ketamine therapists and ketamine clinics popping up all over the world.

Legal status & availability 

Currently, psilocybin is classified as a Schedule I drug by the DEA, meaning they have no accepted medical use & high potential for abuse according to United States federal law [8]. Despite this, some cities and states, including Oakland and Denver, have decriminalized possession of psilocybin and other psychedelics, meaning possession is a low priority for law enforcement. In addition, some researchers and therapists are already using it in a controlled setting to study its potential to treat mental health conditions such as depression, anxiety, and addiction. 

In comparison, ketamine is classified as a Schedule III controlled substance, meaning it has some accepted medical uses but also carries a potential for abuse and dependence [9]. Despite its classification, ketamine is being used in therapy, and clinics are opening up all over the United States to offer treatment with ketamine. It is important to note that both psilocybin and ketamine are strictly regulated, and their use is limited to approved medical settings.

Risks & Precautions 

As with any form of medical treatment, psilocybin and ketamine come with risks that must be considered before use. If you are taking other medications or suffer from pre-existing physical or mental health conditions, you should always consult your doctor before using either treatment.

Both psilocybin and ketamine show great potential as treatments for various mental health conditions and are being increasingly studied by researchers. While more research is needed to fully understand their safety and efficacy profiles, the results of early studies are promising. They suggest that they may become accepted medical practices in mainstream psychiatry and psychology clinics in the future.

At Psychly, we are committed to upholding the highest standards in our content creation process. We strive to ensure that all statements presented in our articles are supported by reliable, high-quality sources, such as peer-reviewed studies and reputable academic journals.

- The Psychly Team

  1. Cato, Mason, N. L., & Kim. (2021). Psychedelics and Neuroplasticity: A Systematic Review Unraveling the Biological Underpinnings of Psychedelics12. https://doi.org/10.3389/fpsyt.2021.724606
  2. ‌Goodwin, G. M., Aaronson, S. T., Alvarez, O., Arden, P. C., Annie Lilian Baker, Bennett, J. C., Bird, C., Blom, R. E., Brennan, C., Brusch, D., Burke, L., Kete Campbell-Coker, Carhart-Harris, R., Cattell, J., Daniel, A., DeBattista, C., Dunlop, B. W., Eisen, K., Feifel, D., & Forbes, M. (2022). Single-Dose Psilocybin for a Treatment-Resistant Episode of Major Depression387(18), 1637–1648. https://doi.org/10.1056/nejmoa2206443
  3. ‌Yu, C. L., Yang, F. C., Yang, S. N., Tseng, P. T., Stubbs, B., Yeh, T. C., Hsu, C. W., Li, D. J., & Liang, C. S. (2021). Psilocybin for End-of-Life Anxiety Symptoms: A Systematic Review and Meta-Analysis. Psychiatry investigation18(10), 958–967. https://doi.org/10.30773/pi.2021.0209
  4. Lazarevic, V., Yang, Y., Flais, I., & Per Svenningsson. (2021). Ketamine decreases neuronally released glutamate via retrograde stimulation of presynaptic adenosine A1 receptors26(12), 7425–7435. https://doi.org/10.1038/s41380-021-01246-3
  5. ‌Pichl, T., Keller, T., Hünseler, C., Roth, B., Janoschek, R., Appel, S., & Hucklenbruch-Rother, E. (2020). Effects of ketamine on neurogenesis, extracellular matrix homeostasis and proliferation in hypoxia-exposed HT22 murine hippocampal neurons. Biomedical reports13(4), 23. https://doi.org/10.3892/br.2020.1330
  6. Anand, A., Mathew, S. J., Sanacora, G., Murrough, J. W., Goes, F. S., Murat Altinay, Aloysi, A. S., Asghar-Ali, A. A., Barnett, B. S., Chang, L. C., Collins, K. A., Costi, S., Iqbal, S., Jha, M. K., Krishnan, K., Malone, D. A., Nikayin, S., Nissen, S. E., Ostroff, R. B., & Reti, I. M. (2023). Ketamine versus ECT for Nonpsychotic Treatment-Resistant Major Depression388(25), 2315–2325. https://doi.org/10.1056/nejmoa2302399
  7. ‌Falk, E., Schlieper, D., Patrick van Caster, Matthias Lutterbeck, Schwartz, J., Cordes, J., Grau, I., Kienbaum, P., & M. Neukirchen. (2020). A rapid positive influence of S-ketamine on the anxiety of patients in palliative care: a retrospective pilot study19(1). https://doi.org/10.1186/s12904-019-0499-1
  8. WHAT IS PSILOCYBIN? WHAT IS ITS ORIGIN? What are common street names? What does it look like? How is it abused? What is its effect on the body? What is its effect on the mind? (2020). https://www.dea.gov/sites/default/files/2020-06/Psilocybin-2020_0.pdf
  9. Ketamine WHAT IS KETAMINE? (2020). https://www.dea.gov/sites/default/files/2020-06/Ketamine-2020.pdf

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