The agency is calling on doctors and the general public to report cases of seizures tied to e-cigarette use to better understand the link.
These cases warrant "investigation into whether there is in fact a connection", FDA Commissioner Scott Gottlieb said in a statement.
In a statement, the FDA stressed that it does not know yet if there is a direct relationship between vaping and seizures. "This also helps encourage the public to voluntarily report additional adverse events that can better inform our work". What needs further study is what type of e-cigarette could deliver levels of nicotine capable of causing seizures, said Maciej Goniewicz, a toxicologist at Roswell Park Comprehensive Cancer Center in Buffalo, New York.
United States regulators said yesterday they are investigating reports that e-cigarettes - increasingly widespread in America and elsewhere - may cause seizures.
The Food and Drug Administration said Wednesday that there have been dozens of seizures reported after vaping, USA Today reports. Some seizures were reported after just a few puffs of the device, others after a day of use.More news: US Count Found No Pak F-16s Missing, Contradicts India's Claim
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Seizures or convulsions are known potential side effects of nicotine poisoning and have been reported in scientific literature in relation to intentional or accidental swallowing of nicotine-containing e-liquids, according to the FDA. E-cigarette use behaviors also vary and users may deliberately or inadvertently inhale more nicotine than would typically occur. The FDA is seeking reports from other nicotine vape users who experienced seizures possibly caused by the nicotine use.
"We know that nicotine isn't a harmless substance, especially in the developing brains of our youth", Gottlieb said.
Vaping devices confiscated from students at a school in MA.
Under the new rules, most forms of flavoured e-cigarettes would only be sold in stores that verify a customer's age when he or she enters the store, or the store should have a special age-restricted area set aside for vaping products.
Most of those incidents involved youths and young people.