"Peppermint, bayberry, cranberry, wintergreen. Breath mints? Scented candles? No--they're "flavors" of oxygen offered at your local oxygen bar. Since oxygen bars were introduced in the United States in the late 1990s, the trend has caught on, and customers are bellying up to bars around the country to sniff oxygen through a plastic hose (cannula) inserted into their nostrils. And many patrons opt for the "flavored" oxygen produced by pumping oxygen through an aroma en route to the nose.
The oxygen experience in a bar can last from a few minutes to about 20 minutes, depending on customers' preferences and the size of their wallets. The price of about a dollar a minute could leave you gasping for air, but frequent inhalers may get a discount.
Most oxygen bar proprietors are careful not to make medical claims for their product, and state that their oxygen is not a medical gas--it's made and offered strictly for recreational use. But under the Federal Food, Drug, and Cosmetic Act,
any type of oxygen used by people for breathing and administered by another person is a prescription drug."
Its a drug.
"People with some types of heart disease, asthma, congestive heart failure, pulmonary hypertension, and chronic obstructive pulmonary diseases, such as emphysema, need to have their medical oxygen regulated carefully to oxygenate their blood properly, says Purucker. "If they inhale too much oxygen, they can stop breathing.Inhaling oily substances can lead to a serious inflammation of the lungs, known as lipoid pneumonia. Even if an oil-free medium is used, the purity or sterility of the aerosol that is generated cannot be guaranteed. Susceptible customers run the risk of inhaling allergens or irritants that may cause them to wheeze. Inhalation of live contaminants such as bacteria or other pathogens may lead to infection. "
It has side effects.
And if you smoke in the same room it could explode.
http://www.fda.gov/fdac/features/2002/602_air.html
"What's in a scuba tank? Oxygen?
Recreational divers breathe air, not oxygen. It's filtered to remove impurities, but otherwise, it's air like you're breathing now."
It's air. With everything air has. Not just oxygen.
http://www.scubatank.com/General_faqs.htm#22
And thanks to everyone who beat me to my point.