Parkinson’s Disease: Cannabis for Tremors and Rigidity

Parkinson’s Disease (PD) is a progressive neurological disorder that affects movement, causing symptoms such as tremors, muscle rigidity, and bradykinesia (slowness of movement). As the search for effective treatments continues, there’s growing interest in the potential of cannabis, particularly the cannabinoids THC and CBD, to alleviate these symptoms.

The Challenge of Parkinson’s Symptoms

PD is associated with the loss of dopamine-producing neurons in the brain. Dopamine is a neurotransmitter that plays a key role in regulating movement, and its depletion leads to the hallmark symptoms of Parkinson’s. Tremors, typically starting in the hands, and rigidity are often the most visible manifestations of the disease.

Cannabinoids and Parkinson’s Disease

Cannabinoids interact with the endocannabinoid system (ECS), which is involved in a variety of physiological processes including movement. The ECS has two primary receptors, CB1 and CB2, which are found throughout the body, including the brain. Cannabinoids from cannabis, like THC, can bind to these receptors and potentially affect the signaling pathways that regulate movement.

Research Findings

Some studies have explored the effects of cannabis on PD symptoms. A study published in the European Journal of Pain suggested that cannabis might have a place in managing Parkinson’s symptoms due to its neuroprotective and anti-inflammatory properties (Chagas et al., 2014). Another study, presented in the Journal of Psychopharmacology, found that patients with PD reported significant improvements in tremors, rigidity, and bradykinesia after using cannabis (Lotan et al., 2014).

Despite these findings, the research is not unanimous. A clinical review in the journal Therapeutic Advances in Neurological Disorders highlighted the limited and inconsistent evidence currently available, pointing to a need for larger, more rigorous studies to confirm the efficacy and safety of cannabis for PD symptoms (Peres et al., 2018).

Anecdotal Evidence

Anecdotal reports from individuals with Parkinson’s who have used medical cannabis are plentiful, with many reporting reductions in tremors and rigidity. However, anecdotal evidence must be approached with caution, as it does not undergo the controlled, scientific scrutiny that clinical research does.

The Role of CBD

CBD, the non-psychoactive compound in cannabis, has gained particular interest for its potential therapeutic effects without the “high” associated with THC. Preclinical studies suggest that CBD may have antioxidant and neuroprotective properties, which could be beneficial in PD (Fernández-Ruiz et al., 2013).

Safety and Considerations

While some evidence points to potential benefits, it is essential to consider the safety and side effects of cannabis use. Side effects can include impaired balance, which is a significant concern for PD patients who may already be at increased risk of falls. Furthermore, the psychoactive effects of THC might not be suitable for all individuals, especially the elderly or those with predispositions to psychiatric disorders.


While preliminary research and anecdotal evidence suggest that cannabis might help alleviate tremors, rigidity, and other motor symptoms of Parkinson’s Disease, the medical community remains cautious. More extensive clinical trials are needed to understand the therapeutic potential and safety profile of cannabis for PD fully. Patients with Parkinson’s should always consult with their healthcare provider before initiating any form of cannabis-based treatment to ensure it is appropriate for their specific condition and circumstances.


  1. Chagas, M. H., Zuardi, A. W., Tumas, V., et al. (2014). Effects of cannabidiol in the treatment of patients with Parkinson’s disease: An exploratory double-blind trial. Journal of Psychopharmacology.
  2. Lotan, I., Treves, T. A., Roditi, Y., et al. (2014). Cannabis (medical marijuana) treatment for motor and non-motor symptoms of Parkinson disease: An open-label observational study. Clinical Neuropharmacology.
  3. Peres, F. F., Lima, A. C., Hallak, J. E. C., et al. (2018). Cannabidiol as a promising strategy to treat and prevent movement disorders? Therapeutic Advances in Neurological Disorders.
  4. Fernández-Ruiz, J., Sagredo, O., Pazos, M. R., et al. (2013). Cannabidiol for neurodegenerative disorders: Important new clinical applications for this phytocannabinoid? British Journal of Clinical Pharmacology.

This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health providers with any questions you may have regarding a medical condition.