SuperSmoker - e-cigarette

via NY Times
FALL RIVER, Mass. — During 34 years of smoking, Carolyn Smeaton has tried countless ways to reduce her three-pack-a-day habit, including a nicotine patch, nicotine gum and a prescription drug. But stop-smoking aids always failed her.
Then, having watched a TV infomercial at her home here, Ms. Smeaton tried an electronic cigarette, which claimed to be a less dangerous way to feed her addiction. The battery-powered device she bought online delivered an odorless dose of nicotine and flavoring without cigarette tar or additives, and produced a vapor mist nearly identical in appearance to tobacco smoke.
“I feel like this could save my life,” said Ms. Smeaton, 47, who has cut her tobacco smoking to a pack and a half daily, supplemented by her e-cigarette.
That electronic cigarettes are unapproved by the government and virtually unstudied has not deterred thousands of smokers from flocking to mall kiosks and the Internet to buy them. And because they produce no smoke, they can be used in workplaces, restaurants and airports. One distributor is aptly named Smoking Everywhere.
The reaction of medical authorities and antismoking groups has ranged from calls for testing to skepticism to outright hostility. Opponents say the safety claims are more rumor than anything else, since the components of e-cigarettes have never been tested for safety.
In fact, the Food and Drug Administration has already refused entry to dozens of shipments of e-cigarettes coming into the country, mostly from China, the chief maker of them, where manufacture began about five years ago. The F.D.A. took similar action in 1989, refusing shipments of an earlier, less appealing version, Favor Smoke-Free Cigarettes.
“These appear to be unapproved drug device products,” said Karen Riley, a spokeswoman for the agency, “and as unapproved products they can’t enter the United States.”
But enough of the e-cigarettes have made their way into the country that they continue to proliferate online and in the malls.
For $100 to $150 or so, a user can buy a starter kit including a battery-powered cigarette and replaceable cartridges that typically contain nicotine (though cartridges can be bought without it), flavoring and propylene glycol, a liquid whose vaporizing produces the smokelike mist. When a user inhales, a sensor heats the cartridge. The flavorings include tobacco, menthol and cherry, and the levels of nicotine vary by cartridge.
Propylene glycol is used in antifreeze, and also to create artificial smoke or fog in theatrical productions. The F.D.A. has classified it as an additive that is “generally recognized as safe” for use in food. But when asked whether inhaling it was safe, Dr. Richard D. Hurt, director of the Nicotine Dependence Center at the Mayo Clinic, said, “I don’t think so, but I’m not sure anyone knows for sure.”
Of the e-cigarettes themselves, Dr. Hurt added: “We basically don’t know anything about them. They’ve never been tested for safety or efficacy to help people stop smoking.”