CBD for Endometriosis: Preclinical Promise but Not Enough Evidence to Recommend | Research

The takeaway

While lab studies show cannabis-based products may affect endometriosis mechanisms, clinical evidence is too weak to recommend them, and potential harms including cannabis use disorder and psychosis should be considered.

Women with endometriosis, gynecologists, medical cannabis researchers

UK guidance: insufficient evidence to recommend

What the researchers found

Of 264 articles screened, 41 were included. Most evidence comes from lab studies simulating cannabis effects on endometriosis models, with some showing benefit but conflicting results. Few human studies exist, mostly surveys with bias. UK national guidance cannot currently recommend cannabis for endometriosis due to lack of clear evidence.

Why it matters

Endometriosis affects 10% of reproductive-age women and current treatments often impair fertility. Cannabis-based products are being explored as alternatives, but the evidence base is critically thin.

The numbers in context

264 articles screened; 41 included; most evidence preclinical; UK guidance does not recommend cannabis for endometriosis

How the study worked

Systematic review searching PubMed, EMBASE, Cochrane, and gray literature for studies on cannabis-based products and endometriosis or chronic pelvic pain.

What this study cannot tell us

Predominantly preclinical evidence. Human studies limited to biased surveys. Lab results may not translate to clinical effectiveness.

How to read the evidence

Systematic review finding predominantly preclinical evidence with very few human studies, most of which are biased surveys.

When this study was published

Published in 2022

The bigger picture

Many endometriosis patients are already self-medicating with cannabis. The gap between patient demand and clinical evidence highlights the urgent need for randomized controlled trials.

Questions still open

Would topical or vaginal cannabinoid formulations be more effective for pelvic pain than systemic administration? Can endometriosis-specific clinical trials be prioritized?

Common questions

Does CBD help with endometriosis?

Lab studies show some promise, but clinical evidence is too thin to make recommendations. The review noted that human studies are mostly surveys with significant bias, and UK national guidance does not support prescribing cannabis for endometriosis.

What are the risks of using cannabis for endometriosis?

The review highlighted potential harms including cannabis use disorder, psychosis risk, and mood disturbances, noting these should be weighed against unproven benefits.

Read the original research

Cannabidiol for the Management of Endometriosis and Chronic Pelvic Pain.

Journal of minimally invasive gynecology, 29(2), 169-176

View on PubMed ↗Publisher’s paper ↗

Citation

Mistry, Megha; Simpson, Paul; Morris, Edward; Fritz, Ann-Katrin; Karavadra, Babu; Lennox, Carole; Prosser-Snelling, Ed. (2022). Cannabidiol for the Management of Endometriosis and Chronic Pelvic Pain.. Journal of minimally invasive gynecology, 29(2), 169-176. https://doi.org/10.1016/j.jmig.2021.11.017