Vaping Seizures

In August 2019, the U.S. Food and Drug Administration said it found 127 reports of seizures and other neurological symptoms, including fainting and tremors, related to e-cigarette users from 2010 to 2019. Most of the seizures occurred in young people.

Last Modified: September 5, 2023
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Can Vaping Cause Seizures?

So far, there is no definitive evidence linking vaping to seizures. The U.S. Food and Drug Administration first warned the public about the link between seizures and vaping in April 2019. Seizures occurred after a few puffs or up to one day after use, the agency said. The seizures happened in both first-time and experienced users and were more likely to happen in youth and young adults.

Some of the reported cases mentioned seizures in relation to other substances such as amphetamines or marijuana. The FDA is investigating the link between seizures and vaping and trying to gather data on brands used. Researchers aren’t sure if nicotine toxicity or some other ingredients in vaping liquids are to blame for the seizures. Experts agree more study is needed.

In a 2022 case study of three people who had vaping-related seizures, researchers said about 62% of seizures occur within the first 30 minutes of vaping. This “suggests that seizures are caused by nicotine toxicity, as the level of inhaled nicotine is at its highest within this timeframe,” study authors said.

Known e-cigarette side effects include headaches, nausea, nicotine addiction and lung problems. Some studies have linked vaping to serious lung injuries such as e-cigarette or vaping product-use associated lung injury (EVALI), bronchiolitis obliterans organizing pneumonia (BOOP) and bronchiolitis obliterans (popcorn lung).

Nicotine Overdose and Seizures

Nicotine can cause seizures in high doses, according to Dr. Neal L. Benowitz’s 2020 article in Journal of Adolescent Health.

“A nicotine overdose can cause seizures, and nicotine can cause seizures in some animal models of epilepsy. Seizures have been observed in adults who were poisoned with nicotine and in young children who have consumed liquid nicotine, including nicotine-containing e-liquids,” Benowitz wrote.

While it’s more common in children, adults may also suffer an overdose. Symptoms of serious nicotine poisoning include rapid heart rate, vomiting, confusion, seizures and respiratory failure. These symptoms can occur in as little as 15 minutes.

Some vape pods contain more nicotine than others, and people might not be aware of the amount of nicotine they are ingesting. For example, Juul’s 5% pods contain as much nicotine as a pack of cigarettes, and e-cigarettes can deliver nicotine to the brain in about 10 seconds.

But Benowitz said there is not yet enough evidence to say that nicotine in e-cigarettes causes seizures.

“At this point in time, I would not consider seizures to be a potential adverse effect that should influence the decision of an adult smoker to use e-cigarettes to try to stop smoking conventional cigarettes,” he wrote.

How Nicotine Increases Seizure Risk

Seizures occur when the brain has a sudden, uncontrolled electrical disturbance. They can cause changes in movement, feelings and behavior. Researchers think nicotine may cause seizures by activating neurons in the brain.

In a 2017 animal study by Higor A. Iha and colleagues published in Frontiers in Pharmacology, researchers found that nicotine may cause seizures by activating neurons in the amygdala. Data from a 2011 animal study by Dr. Nimisha Sood and colleagues published in Nicotine and Tobacco Research showed that nicotine may increase the risk of breakthrough seizure attacks in people with epilepsy.

The FDA encourages people to report any incidents of seizures connected to e-cigarettes.

“Additional reports or more detailed information about these incidents are vital to help inform our analysis and may help us identify common risk factors and determine whether any specific e-cigarette product attributes, such as nicotine content or formulation, may be more likely to contribute to seizures,” the FDA said in its April 2019 announcement.

Reports of Seizures After Using Juul

The FDA collected some reports from parents of teens who suffered seizures after using Juul.

In one report sent to the FDA in June 2018, a mother reported that her 16-year-old son suffered a grand mal seizure after using Juul Cool Mint at 5% nicotine strength. The teen’s pediatrician suspected the seizure was related to Juul and the pod used.

“I reached him as he was fully seizing, convulsions, turning blue, eyes rolled up in his head. He was unconscious once the convulsions stopped about a minute after they probably started,” she reported. “Paramedics found the Juul device underneath him and when I asked him about it at the hospital, he admitted using it right before the seizure.”

In another report from January 2019, a parent said their 15-year-old daughter suffered a two-to-five-minute seizure after she “hit a JUUL a handful of times in a short period.”

“There are no warning labels notifying consumers of the possibilities of nicotine overdose. This is not the first incident of seizures that has been a problem,” the parent said.

It isn’t just teens suffering seizures. Dr. Timothy Quesada and colleagues reported a vaping seizure case in April 2020. The patient was a 34-year-old man who had a tonic-clonic seizure lasting two minutes.

Lawsuits Filed Over Vaping Seizures

People who used Juul and suffered seizures, nicotine addiction and other health problems have filed lawsuits against Juul Labs, Altria Group and Philip Morris USA, Inc.

Erin and Jared NesSmith filed a class action lawsuit against Juul and its makers in April 2019. The parents claim their daughter became addicted to Juul, and she suffers from seizures. According to the lawsuit, she also unintentionally swallowed vape juice while using the e-cigarette.

“Health authorities consider youth e-cigarettes use an epidemic,” the lawsuit said. “Defendants are to blame. Mimicking Big Tobacco’s past marketing practices, Defendants prey on youth to recruit replacement smokers for financial gain.”

There were 4,908 federal lawsuits pending in California federal court as of Dec. 15, 2022.

Please seek the advice of a medical professional before making health care decisions.