How does cannabis affect heart or liver function in long-term use for neuropathic pain?

PostedFebruary 17, 2026

UpdatedFebruary 17, 2026

ByMy Patient Advice

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

As medical cannabis becomes more commonly used for chronic neuropathic pain, concerns about how it affects vital organs are growing. Specifically, questions arise around cannabis effects on heart and liver function in long-term use. While cannabis may offer therapeutic relief, regular use over time can impact cardiovascular and liver health.

Understanding potential long-term cannabis’ health risks helps patients and clinicians make informed choices. Although many people tolerate medical cannabis well, it’s crucial to monitor any changes in heart rate, blood pressure, and liver enzymes when used over extended periods.

What to Consider with Long-Term Use

Here are the most relevant organ-related effects observed in patients using cannabis over time.

Heart rate and rhythm changes

Cannabis may cause an increased heart rate or irregular rhythm in some users. People with pre-existing heart conditions should consult a healthcare provider before beginning treatment.

Blood pressure fluctuations

Long-term cannabis users have reported both high and low blood pressure episodes. This raises concerns about the broader cannabis and cardiovascular and liver safety profile over time.

Liver enzyme elevation

Studies have shown that medical cannabis’ organ effects may include raised liver enzymes, particularly in those also taking other medications metabolised in the liver.

Drug metabolism interference

Cannabis can affect how the liver processes other drugs, altering their effectiveness or increasing toxicity risks. Monitoring is vital when combining treatments.

In conclusion, while cannabis may support nerve pain management, users must be aware of cannabis effects on heart and liver function in long-term use. Routine medical check-ups are essential to ensure safe and sustainable treatment.

If you’re exploring cannabis treatment options for neuropathic pain, 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 neuropathic pain

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.