By Pat Anson, PNN Editor

Advocates of medical marijuana – or cannabis use in general – have long said you can’t overdose on cannabis and that the natural plant is even “safer than many foods.”   

But researchers at Florida Atlantic University say cannabis products – particularly synthetic cannabis – are riskier than many people believe. In a study recently published in the Journal of Nursing Scholarship, they called cannabis “a legitimate public health concern” that has killed hundreds of Floridians in recent years.  

Analyzing 2014 to 2020 data from the Florida Department of Law Enforcement, researchers found that 386 people died as a result of drug intoxication caused by cannabis use. It’s important to note that the vast majority of those deaths (98.7%) involved accidents such as motor vehicle crashes, with a handful of deaths caused by murder or suicide. No overdoses were reported.

Most of the Florida deaths also involved other substances such as alcohol, opioids, heroin and cocaine. In nearly two-thirds of the deaths, synthetic cannabinoids such as K2 or Spice were involved. Synthetic cannabinoids are chemicals sprayed onto dried, shredded leaves that mimic the effect of cannabis, but are often quite stronger.  

“Synthetic cannabinoids are part of the new psychoactive substances that are two to 100 times more potent than THC, the main psychoactive compound in marijuana,” said lead author Armiel Suriaga, PhD, an assistant professor in FAU’s College of Nursing.

Suriaga and his colleagues found that over 13 percent of those who died had cardiac-related conditions such as high blood pressure, atherosclerosis, cardiac arrhythmias or an enlarged heart. There was one death from an ischemic stroke and one death from a hemorrhagic stroke, both related to synthetic cannabis use.

“The persistent deaths from cannabis and synthetic cannabis use are a legitimate public health concern,” said Suriaga. “The public should remain vigilant of the adverse health outcomes associated with these substances and their unpredictable effects, especially for men who are disproportionately affected, and particularly for people with underlying cardiovascular and respiratory conditions.”

‘Misleading and Sensational’ Study

Marijuana advocates say it was unfair of the researchers to include synthetic cannabis in their study, which was funded by the National Institutes on Drug Abuse and the American Association of Colleges of Nursing. 

“To lump in adverse effects from synthetically produced compounds in this analysis is misleading and sensational, as these products are not cannabis and their safety profile is not at all comparable to that of natural cannabis,” said Paul Armentano, Deputy Director of NORML.

“Cannabis is psychoactive and that is why advocacy groups opine in favor of its regulation, including the imposition of age controls and product testing for purity and potency. Adverse effects from cannabis, like dysphoria (anxiety), are possible but are best mitigated by regulation and education — not by criminal prohibition.”

Previous studies have looked at the relationship between cannabis and motor vehicle accidents, with mixed results. A survey of people in Michigan who used medical marijuana for chronic pain found that over half had driven while under the influence of cannabis, and one in five say they've driven while “very high.”

Other studies found a decrease in traffic fatalities in states that legalized medical marijuana. That may be because patients were substituting cannabis for alcohol and other drugs used to relieve their symptoms.