Recreational cannabis laws tied to faster growth in heart-related hospitalizations
An analysis of more than 50 million discharge records examined cardiovascular admissions in Western U.S. states after recreational cannabis legalization. Admissions for atrial fibrillation, heart failure, and heart attack rose faster in the legalizing region than in states without such laws. The researchers suggest broader cannabis use, including among older adults, may help explain the pattern.
Researchers used national inpatient discharge data from 2012 through 2018, covering roughly 97% of the U.S. population, and compared the Western region—where recreational cannabis legalization began in January 2014—with areas that had not adopted such laws. The analysis included 50,042,564 discharge records.
Estimated yearly admission increases in the legalizing region were about 2% for atrial fibrillation, nearly 4% for heart failure, and just over 3% for heart attack. Other cardiovascular outcomes also appeared higher, but those differences were not statistically significant. The study is observational and cannot prove causation.
The findings could prompt clinicians to ask about cannabis use when assessing cardiovascular risk, especially in older adults. Hospitals and health systems may face added demand for heart-related care if the pattern reflects a real effect. Public understanding of cannabis safety may also shift, though the observational design means the results should not be treated as proof that legalization directly causes heart problems.