Most current treatments, such as varenicline, target the 42 (alpha-4 beta-2) nicotinic acetylcholine receptors (nAChRs)
Our results demonstrate that overall electronic cigarettes seem to be less harmful than regular cigarettes, but their elevated content of toxic metals such as nickel and chromium do raise concerns, said Constantinos Sioutas, professor at the USC Viterbi School of Engineering, and corresponding author of the study, which was published online on August 22 by the Journal of Environmental Science, Processes and Impacts
These estimates are based on the proportional estimation approach, which starts with an estimate of the costs of total litter (all product waste, or APW) for each country, and then applies an estimate of the proportion of all litter that is TPW (i.e., a TPW weight)
However, its still a good idea to avoid breathing it in if you can help it