Vaping may 援助（する） smoking 停止 but also 上げる relapse 危険
By Lisa Rapaport
(Reuters Health) - Adults who smoke cigarettes may have an easier time cutting 支援する or quitting altogether if they start vaping, but a new French 熟考する／考慮する also 示唆するs that vaping may make ex-smokers more likely to relapse.
"の中で adults, electronic cigarette use by never smokers is 極端に rare - most 使用者s are smokers who want to やめる or 減ずる their タバコ 消費 or former smokers who want to 妨げる a relapse," said Ramchandar Gomajee, lead author of the 熟考する／考慮する and a 研究員 at Sorbonne University in Paris.
Gomajee and 同僚s followed 5,400 smokers for an 普通の／平均（する） of 23 months, 含むing 822 people who also 報告（する）／憶測d daily use of e-cigarettes. Vapers smoked more 伝統的な cigarettes a day - 11.2 compared with 9.8 on 普通の／平均（する）.
By the end of follow-up, however, vapers 削減（する） 支援する more on daily cigarettes - 除去するing 4.4 a day compared with 2.7 for 非，不，無-vapers. And vapers were also 67% more likely to やめる smoking.
分かれて, 研究員s also followed 2,025 former smokers for an 普通の／平均（する） of 22 months, 含むing 176 who 報告（する）／憶測d 正規の／正選手 e-cigarette use. Vapers were 70% more likely to 再開する smoking 伝統的な cigarettes during the 熟考する／考慮する than ex-smokers who had やめる without vaping.
"Former smokers who are using electronic cigarettes are still （麻薬）常用者d to nicotine," Gomajee said by email. "In any 状況／情勢 where they を煩う （麻薬中毒の）禁断症状s but are not able to use their electronic cigarette, for example because they have no e-liquid, or because of technical problems with the electronic cigarette, they are likely to smoke again."
The 熟考する／考慮する wasn't a controlled 実験 designed to 証明する whether or how vaping might 衝撃 smoking habits for 使用者s of 伝統的な cigarettes. And, the 熟考する／考慮する also wasn't designed to 実験（する） the safety or 有効性 of e-cigarettes as a smoking 停止 援助（する）.
Another 制限 is that 研究員s 欠如（する）d data on the 推論する／理由s people used e-cigarett es, making it impossible to 決定する whether smoking 停止 or 削減 of daily cigarette use was a goal of people who vaped, 研究員s 公式文書，認める in JAMA 内部の 薬／医学.
Big U.S. タバコ companies are all developing e-cigarettes. The 殴打／砲列-力／強力にするd gadgets feature a glowing tip and a heating element that turns liquid nicotine and flavorings into a cloud of vapor that 使用者s 吸い込む.
When e-cigarettes 含む／封じ込める nicotine, they can be 中毒の like 伝統的な cigarettes. Even without nicotine, earlier 研究 示唆するs that flavorings and other 成分s in e-liquids used for vaping could be linked to serious breathing problems.
A big question about e-cigarettes, すなわち, whether they're 安全な or at least safer than 伝統的な cigarettes, isn't answered by the 現在の 熟考する／考慮する.
"E-cigarettes do not have the same level of known carcinogens as cigarettes, so they are safer in this 尊敬（する）・点," said Thomas Wills, a 研究員 at the University of Hawaii 癌 中心 in Honolulu who wasn't 伴う／関わるd in the 熟考する／考慮する.
"However, in the last three years a lot has come out on other 味方する 影響s," Wills said by email. "There are now 15 熟考する／考慮するs showing a 結合，連鎖 of e-cigarette use to respiratory 病気 (喘息 and COPD) in both adolescence and adulthood ... so it's difficult to argue 本気で that e-cigarettes are 安全な from a health 見地."
Smokers who want to やめる should try other 停止 援助（する）s like nicotine 交替／補充 patches or Chantix, a prescription smoking 停止 麻薬, before 試みる／企てるing to やめる 補佐官d by e-cigarettes, Wills advised.
While some people do 達成する long-称する，呼ぶ／期間／用語 停止 with the help of e-cigarettes, this is a small fraction of smokers, said Stanton Glantz, director of the 中心 for タバコ 支配（する）／統制する 研究 and Education at the University of California San Francisco.
"E-cigarettes should not be recommended for smoking 停止," Glantz, who wasn't 伴う／関わるd in the 熟考する／考慮する, said by email. "二重の use is more dangerous than smoking alone, which is an important and under-高く評価する／（相場などが）上がるd 影響."
SOURCE: http://bit.ly/2YT0pHH JAMA 内部の 薬／医学, online July 15, 2019.
