An international research review of 80 randomized controlled trials published in the Cochrane Library shows that nicotine-containing e-cigarettes are more effective for smoking cessation than traditional nicotine replacement therapies. Despite this higher relative success rate, the analysis reveals that the vast majority of smokers continue to smoke.
Comparing Cessation Rates Across Replacement Methods
Traditional nicotine replacement therapies (NRT)—including patches and gums introduced in the 1980s—work by curbing withdrawal symptoms. According to the review, NRT helps approximately six out of 100 smokers maintain abstinence for at least six months.
Nicotine-containing e-cigarettes demonstrated higher success rates, enabling about ten out of 100 smokers to stop smoking tobacco cigarettes for six months or longer. This translates to four additional successful quitters per 100 people compared to conventional replacement products.
| Cessation Method | Successful Quitters (Per 100) | Minimum Abstinence Period |
|---|---|---|
| Nicotine E-Cigarettes | ~10 people | 6 months |
| Nicotine Replacement Therapy (Patches/Gums) | ~6 people | 6 months |
| Nicotine-Free E-Cigarettes | ~8 people | 6 months |
High Relapse Rates and Health Uncertainties
The researchers also evaluated e-cigarettes without nicotine. The evidence suggests that adding nicotine to e-liquids helps roughly two more people per 100 quit tobacco, though researchers noted this specific comparison requires further scientific verification.
Despite the edge over traditional therapies, 90% of smokers who try e-cigarettes do not achieve long-term cessation and continue smoking combustible cigarettes. This highlights the high addictive potential of tobacco products, where an estimated two out of three first-time users become daily smokers.
Questions also remain regarding extended usage. In a public statement, Cochrane Germany noted: “The question of what e-cigarettes achieve for smoking cessation over the long term—beyond one to two years—remains unanswered.” Health authorities also point out that inhaling e-cigarette aerosols carries health risks, though definitive data on long-term outcomes is not yet available.