Vaping Marijuana Gets You Higher Than Smoking It, According To New Study.

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Vaping Marijuana
Vaping Marijuana

Marijuana inhaled through a vaping device produces a more powerful high than the smoked version, a new study finds.

At the same level of THC, the ingredient in marijuana that gives people a high, vaping led to higher blood concentrations of the chemical than smoking, as well as higher levels of cognitive and psychomotor impairment, according to the report, published Friday in JAMA Network Open.

It’s important to understand the impact of vaping as more and more states legalize cannabis and the drug becomes more easily accessible, said the study’s lead author, Tory Spindle, a postdoctoral research fellow at Johns Hopkins School of Medicine. “More people are coming into cannabis dispensaries and using for the first time in a while or for the first time ever,” Spindle told NBC News. “They should be aware that vaping will produce stronger effects. We found there was a fine line sometimes between a dose that produced the desired effects and one that was too strong.”

The study comes out as more and more Americans are using pot, including teens. In fact, a recent study found that as many as 1 in 11 are vaping cannabis, while another reported that cannabis has more deleterious effects on developing brains than alcohol.

To learn more about the impact of vaping marijuana, Spindle and his colleagues rounded up 17 intermittent pot smokers whose average age was 27. Most had not used cannabis in a long while; on average, it had been nearly a year.

All study volunteers completed three eight-and-a-half-hour sessions during which they smoked marijuana at three different THC doses (zero milligrams, 10 mg and 25 mg) and three in which they vaped the drug at the three different doses. The sessions were scheduled to be a week apart. The zero-milligram dose served as the control in this study.

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Once the volunteers had vaped or smoked the marijuana, their cognitive and motor abilities were tested. They were also asked to fill out a questionnaire rating items that assessed the extent to which volunteers felt the following: drug effects; pleasant drug effects; unpleasant drug effects; sick; heart racing; anxious and/or nervous; relaxed; paranoid; alert; irritable; vigorous and/or motivated; restless; hungry and/or had the munchies, sleepy; dry mouth; dry, red, and/or irritated eyes; throat irritation and/or coughing; difficulty performing routine tasks; memory impairment; and cravings from cannabis.

At both non-zero doses, the impact of cannabis was larger when vaped than when smoked, researchers found. But at the higher dose, vapers experienced more negative side effects. “Two people vomited from the high dose,” Spindle said. “One actually experienced some audio and visual hallucinations. Some experienced paranoia as well. So it’s not just about impairment. The negative effects can be quite unpleasant.”

Spindle suspects that stronger effects are felt when vaping mainly because none of the material is lost to combustion. “The difference is most likely due to some destruction of the drug when the cannabis is burned, which doesn’t occur when it is vaporized,” he said.

Proof that vaping has a stronger impact than smoking is important, said Dr. Michael Lynch, director of the Pittsburgh Poison Center at the University of Pittsburgh Medical Center.

“People often create an equivalency between vaping and smoking, assuming that if you’re using the same amount of the drug the effects will be similar,” Lynch said in an interview. “I think this helps inform people who are going to use it medically or recreationally that the effects aren’t the same and the same dose could lead to more negative or adverse effects.”

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Lynch is particularly concerned about teens. “Adolescents are more likely to vape than to smoke,” he said. “Data coming mostly from nicotine use shows that vaping is a pretty common way teens are first exposed.”

Another worry to keep in mind, Lynch said, is that as teens start to drive, “they need to understand that these drugs are intoxicating. We’ve definitely seen rises in drugged-driving-related injuries and fatalities.”

There are a lot of misconceptions regarding vaping, said Stan Glantz, a professor of medicine and director of the Center for Tobacco Control Research and Education at the University of California, San Francisco.

“There’s an assumption that because you’re not setting the substance on fire, it’s not as bad,” Glantz said. “That’s turning out not to be true. In addition to delivering a higher dose of the drug, vaping produces an aerosol of ultrafine particles that are sent to the lungs and then the brain. These particles are really small, a 50th to 100th the size of a hair. They can go right through the lungs and into the blood and from there into the cells of the body.”



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