Do e-cigs cause nausea?

If you are getting: too much nicotine, maybe. Nobody really knows what the health risks of e-cigs are, because there haven't been any published studies yet. The FDA is proposing regulations, and if they are passed, we may begin to get some real information. The propellant in these devices are oils, contain propylene glycol, flavorings, additives and preservatives, and nobody really knows what they do long-term.