"Compared to the current nicotine vapor inhaler, we are able to give smokers more nicotine, although still less than a cigarette, with less irritation, resulting in reduced cravings," said Rose. "Thus we are able to achieve a therapeutic effect with greater tolerability."

More research is needed to examine the safety and effectiveness of prolonged（延长的，拖延的） use of the inhalation system, and to assess its role in helping people quit smoking. But, Rose says if all goes well, he anticipates the product could become commercially available within three to five years.

He also says the novel inhalation system may one day prove useful for delivery of other medications. Duke has filed patent applications on the new technology, which was invented by Rose and his colleagues, including his brother, Seth D. Rose, Ph.D., Duke colleague, Thangaraju Murugesan, Ph.D., and James E. Turner, an inventor of the Nicotrol/Nicorette inhaler.

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