Are there any long-term studies on cannabis use for fibromyalgia?

PostedFebruary 16, 2026

UpdatedFebruary 16, 2026

ByMy Patient Advice

Author: Julia Sutton, MSc | Reviewed by: Dr. Clarissa Morton, PharmD

As interest in cannabis for chronic conditions grows, many are asking whether long-term cannabis use is safe and sustainable especially for people with fibromyalgia . While short-term results often seem positive, long-term effects are less well understood.

This is mainly because most research to date focuses on short-duration studies. However, early findings and patient experiences are helping build a clearer picture of the benefits and potential risks associated with long-term cannabis use. The limited availability of comprehensive safety data remains one of the key challenges in evaluating cannabis as a routine treatment.

What we know so far about long-term cannabis use

Though more robust trials are still needed, existing observations and smaller studies provide some insights into long-term cannabis use for fibromyalgia:

Sustained Symptom Relief

Many patients report ongoing benefits in pain, sleep, and mood, even after months or years of regular cannabis use.

Safety and Tolerance

Preliminary safety data shows cannabis is generally well tolerated over time, though mild side effects like fatigue or dizziness may persist in some users.

Dependence Risk

While physical dependence appears low, some users may develop psychological reliance, especially without medical supervision.

Cognitive Effects

Long-term use of THC-dominant products may affect memory and focus, particularly at higher doses or with frequent use.

Currently, the outlook on long-term cannabis use for fibromyalgia remains cautiously optimistic. However, due to the limited scope of existing studies, it is essential for patients to consult with healthcare providers familiar with cannabis medicine to ensure ongoing safety and effectiveness. As further safety data emerges, more confident conclusions can be drawn about cannabis’s role in chronic pain care.

If you’re exploring cannabis treatment options for fibromyalgia, visit providers like LeafEase for personalised consultations and guidance tailored to your needs.

For a deeper dive into the science, diagnosis, and full treatment landscape, read our complete guide to Medical Cannabis and Fibromyalgia .

Julia Sutton, MSc

Author

Julia Sutton is a clinical psychologist with a Master’s in Clinical Psychology and experience providing psychological assessment and therapy to adolescents and adults. Skilled in CBT, client-centered therapy, and evidence-based interventions, she has worked with conditions including depression, anxiety, bipolar disorder, and conversion disorder. She also has experience in child psychology, conducting psycho-educational evaluations and developing tailored treatment plans to improve learning and well-being.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the author's privacy.

Dr. Clarissa Morton, PharmD

Reviewer

Dr. Clarissa Morton is a licensed pharmacist with a Doctor of Pharmacy degree and experience across hospital, community, and industrial pharmacy. She has worked in emergency, outpatient, and inpatient pharmacy settings, providing patient counseling, dispensing medications, and ensuring regulatory compliance. Alongside her pharmacy expertise, she has worked as a Support Plan & Risk Assessment (SPRA) officer and in medical coding, applying knowledge of medical terminology, EMIS, and SystmOne software to deliver accurate, compliant healthcare documentation. Her skills span medication safety, regulatory standards, healthcare data management, and statistical reporting.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the reviewers's privacy.