An overview of the evidences of herbals for smoking cessation

Vernonia cinerea pastilles is effective for smoking cessation

Background and aim

Vernonia cinerea (VC) is a herb that can alleviate nicotine addiction, potentially aiding in smoking cessation. Previous studies have examined four-to eight-week treatments using VC, but have found it to be ineffective. This study aimed to evaluate the smoking cessation effects of VC in addicted smokers over a longer treatment duration with pastilles.

Experimental procedure

This was a randomized double-blinded controlled trial conducted at a community pharmacy. The inclusion criteria were age between 18 and 60 years, intention to quit smoking, and low to moderate level of nicotine addiction. All eligible participants were stratified according to nicotine addiction level and then randomly assigned either VC treatment or placebo. The VC group received two pastilles three times daily, while the control group received a placebo for 12 weeks. The outcomes were continuous abstinence rate (CAR) and point abstinence rate (PAR) at four and 12 weeks.

Results

There were 121 eligible participants; 10 participants were not willing to participate. In total, there were 111 eligible participants, 54 of whom were treated with VC (48.65%) and 57 of whom were given a placebo (51.35%). Baseline characteristics were comparable between the two groups. The VC group had a significantly higher chance of smoking cessation at 2.01 (95% CI of 1.03, 3.92) compared with the placebo group at the end of the study. There were no significant side effects in either group.

Conclusion

The VC pastille group had significantly higher CAR than the placebo group at week 12.

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Vernonia cinerea (VC) is a potential herb for smoking cessation.

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Several studies show non-significant results on smoking cessation by VC.

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This is the first study showed that VC is effective for smoking cessation.

A bibliometric analysis of clinical study literature of traditional Chinese medicine therapies for smoking cessation

INTRODUCTION

Traditional Chinese medicine (TCM) is commonly used for smoking cessation in China. The aim of this study is to perform a comprehensive literature search to identify clinical studies on TCM therapies for smoking cessation.

METHODS

Publications of randomized controlled trials, controlled clinical studies, cohort studies, case-control studies, case series and case reports, reviews and cross-sectional studies on smoking cessation using TCM therapies were retrieved from seven databases from their inception to February 2017. The following data were extracted and analyzed: study type, year of publication, language, country or region, journals, participants, intervention and comparison, and outcome.

RESULTS

In total, 260 publications on TCM therapies for smoking cessation were identified from 1980 to 2016, including 52 randomized clinical trials, 7 controlled clinical studies, 1 cohort study, 110 case series, 18 case reports, 50 narrative reviews, 17 systematic reviews, and 5 cross-sectional studies. Of these, 68.5% (178) were published in Chinese and the remaining published in English. Mainland China (n=129, 49.6%) was the leading country in this field, followed by USA (n=27, 10.4%) and UK (n=25, 9.6%). A total of 36 645 participants from 40 countries with age ranging from 12 to 86 years were involved in 188 clinical studies (excluding reviews and cross-sectional studies). The most commonly reported therapies were auricular acupressure (25, 13.3%), body acupuncture (14, 7.4%), and body acupuncture plus auricular acupressure (14, 7.4%). Composite outcomes were most frequently reported (110, 58.5%).

CONCLUSIONS

A substantial number of clinical studies have been conducted and published on TCM therapy for smoking cessation, mainly focusing on acupuncture stimulation techniques. The findings suggest that future research should pay more attention to acupuncture for smoking cessation.

Efficacy and safety of Vernonia cinerea (L.) Less. for smoking cessation: A systematic review and meta-analysis of randomized controlled trials

BACKGROUND & OBJECTIVE

Several randomized controlled trials have investigated Vernonia cinerea (L.) Less. for smoking cessation but there remains no critical summary of overall findings. This study uses systematic review and meta-analysis to summarize the efficacy and safety of V. cinerea.

METHODS

Nine databases were searched through November 2017. Randomized controlled trials that reported the smoking cessation effect of V. cinerea were included. Data were extracted by two independent researchers. Study quality was assessed using the Cochrane risk of bias and JADAD score. The estimates of pooled effects were calculated as relative risk (RR) with 95% CI using a random-effects model.

RESULTS

Five trials with 347 smokers were included. V. cinerea treatment group was significantly associated with cessation rate higher than that in the control group with no evidence of heterogeneity for both continuous abstinence rate (CAR) at week 8 with risk ratio (RR): 1.69, 95% CI [1.00, 2.86]; week 12 RR: 2.18, 95% CI [1.17, 4.04]) and 7-day point prevalence abstinence rate (PAR) (week 8 RR: 1.51, 95% CI [1.01, 2.27]; week 12 RR: 1.93, 95% CI [1.24, 2.99]) at week 8 and 12, respectively. There was no significant difference of all adverse events between the treatment and the control groups.

CONCLUSION

Our study demonstrates that V. cinerea has potential efficacy for smoking cessation. Further well-design RCTs of standardized V. cinerea compared with standard treatment should be conducted to strengthen this evidence.

Smoking cessation programmes using traditional medicine in Korea

Background

There are growing interests in using various methods including traditional and complementary medicines (T&CM) for tobacco control. The study aimed to introduce how traditional Korean medicine (TKM) applied to smoking cessation programmes in Korea and to show the detail information of each programme for designing other smoke cessation programmes.

Methods

Reports of the smoke cessation programmes in Korea were searched on March 10th, 2016, from the webpages of the related agencies and the databases: the Ministry of Health and Welfare, the Korea Health Foundation, the Association of Korean Medicine, PubMed, Google scholar, the RISS, the KISS, the NDSL, and the OASIS. Smoking cessation programmes, projects, or services using traditional Korean medicine (TKM) were included with no language, implementation site, and year restrictions.

Results

The three smoking cessation programmes using TKM in South Korea were the public health centre smoking cessation programme (PHC-SCP), the Ministry of Gender Equality & Family smoking cessation programme (MOGEF-SCP), and the National Health Insurance Service smoking cessation treatment project (NHIS-SCP). All programmes included ear acupuncture and counselling. Manual acupuncture was only used in the NHIS-SCP. The MOGEF-SCP and the NHIS-SCP used herbal medicines selectively. The PHC-SCP and MOGEF-SCP provided education programme and other tools such as non-smoking doll, self-writing handbook. They were run at no cost for participants. Treatment period were different for each programmes, 3 weeks, 4 weeks, 8 to 12 weeks, respectively. Treatment frequency was twice a week for PHC-SCP and MOGEF-SCP, and dependent on each clinic for NHIS-SCP.

Conclusions

This study showed the summaries of the smoking cessation programme that used TKM. The three programmes and the detail information will be a reference for other countries that are going to apply T&CM to their smoking cessation programme. Though TKM integrated smoking cessation programmes had been contributed to stop smoking, persistent efforts are needed to develop more effective and various treatments. In addition, this study suggests that consistent support and systematic reporting system are needed to be successful in non-smoking strategy.

Electronic supplementary material

The online version of this article (doi:10.1186/s12906-016-1462-9) contains supplementary material, which is available to authorized users.