After medical marijuana became legal in Massachusetts, cannabis-related poison control calls involving the commonwealth's children and teenagers doubled, according to a public health investigation led by University of Massachusetts Amherst injury prevention researcher Jennifer Whitehill.
The increase in calls to the Regional Center for Poison Control and Prevention at Boston Children's Hospital occurred despite legislative mandates for childproof packaging and warning labels, and before the recreational use of marijuana was legalized for adults.
"As states across the country enact more permissive marijuana policies, we need to do more to promote safe storage in households with children," says Whitehill, assistant professor of health promotion and policy and lead author of the research published inJAMA Network Open.
Whitehill and former UMass Amherst graduate student Calla Harrington analyzed data from the poison control center in collaboration with staff from the center, including medical director Dr. Michele Burns and clinical fellow Dr. Michael Chary. The research team reviewed the center's data from 2009 through 2016 -- four years before and four years after medical marijuana was legalized in Massachusetts.
During the study period, the poison control center received 218 calls from Massachusetts involving cannabis exposure in children and teens, from infancy to age 19, including 98 single-substance calls and 120 polysubstance calls. Those calls represented 0.15 percent of all poison control calls during that time period for that age group.
"While we're pleased to see that the incidence is relatively low, we feel these cases are preventable, and the issue needs to be on the radar of policymakers and parents, particularly now that dispensaries are open for adult-use sales," Whitehill says.
Some highlights of the findings:
The paper concludes, "This study suggests that states liberalizing marijuana policies should consider strengthening regulations to prevent unintentional exposure among young children and enhancing efforts to prevent use by teenagers, with particular attention to edible cannabis products and concentrated extracts."
Whitehill says the next step is to study the impact of marijuana's legalization for adult use, which went into effect in late 2016. Two years later, in November 2018, marijuana retail stores began opening.
"Given what we've seen here," Whitehill says, "I would expect the calls to the poison control center to increase even more."
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