Past-month cannabis use was associated with lower levels of inflammatory markers in the blood, particularly among people with a history of methamphetamine use disorder.
People following cannabis and inflammation research, and those interested in harm reduction for stimulant use and HIV.
Cannabis associated with lower levels of 4 inflammatory markers
What the researchers found
Among 234 participants (86 with HIV, 148 without), past-month cannabis use was independently associated with lower CXCL10/IP-10 levels overall. Among those with lifetime methamphetamine use disorder, cannabis users also showed lower levels of CCL2/MCP-1, ICAM-1, and VCAM-1. The VCAM-1 reduction was observed only in people without HIV.
Why it matters
Methamphetamine use and HIV both drive chronic inflammation that increases risk for cardiovascular and neurological damage. If cannabis genuinely reduces inflammatory markers in these populations, it could point toward cannabinoid-based approaches to managing inflammation-driven complications.
The numbers in context
234 participants: 86 with HIV, 148 without. Four markers measured: CXCL10/IP-10, CCL2/MCP-1, ICAM-1, VCAM-1. Cannabis associated with lower CXCL10/IP-10 across all participants. Among those with meth history, cannabis associated with lower CCL2/MCP-1, ICAM-1, and VCAM-1.
How the study worked
Cross-sectional study of 234 participants who provided urine and blood samples and completed neuromedical, psychiatric, and substance use assessments. Generalized linear models examined associations of lifetime methamphetamine use disorder, past-month cannabis use, and HIV status with four plasma inflammatory markers.
What this study cannot tell us
Cross-sectional design; cannot determine causation. Cannabis use was self-reported and binary (past month yes/no). Small subgroups when stratified by HIV, meth history, and cannabis use. No information on type, dose, or frequency of cannabis use. Potential confounding by other health behaviors.
How to read the evidence
Preliminary: cross-sectional observational data with small subgroups and binary cannabis measure.
When this study was published
Published in 2025.
The bigger picture
Chronic inflammation is increasingly recognized as a driver of disease in both HIV and stimulant use disorders. These findings add to a growing body of evidence suggesting cannabinoids have anti-inflammatory properties, though observational data cannot establish whether cannabis causes the lower inflammation or if other factors explain the association.
Questions still open
- Does cannabis actively reduce inflammation, or do less-inflamed people tend to use cannabis?
- Which cannabinoids (THC, CBD, others) are most responsible for anti-inflammatory effects?
- Could controlled cannabis administration reduce inflammation in clinical trials?
Common questions
Does cannabis reduce inflammation?
Can cannabis help people with HIV or meth-related inflammation?
Read the original research
Cannabis Use Moderates Methamphetamine- and HIV-Related Inflammation: Evidence from Human Plasma Markers.
Viruses, 17(8)
Citation
Rogers, Jeffrey M; Chentsova, Victoria O; Wang, Crystal X; Marcondes, Maria Cecilia Garibaldi; Cherner, Mariana; Ellis, Ronald J; Letendre, Scott L; Heaton, Robert K; Grant, Igor; Iudicello, Jennifer E. (2025). Cannabis Use Moderates Methamphetamine- and HIV-Related Inflammation: Evidence from Human Plasma Markers.. Viruses, 17(8). https://doi.org/10.3390/v17081143
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