Some of the best evidence summaries in medicine come from Cochrane. Here's their work on acupuncure and cocaine:
Cochrane Database Syst Rev. 2006 Jan 25;(1):CD005192.
Auricular acupuncture for cocaine dependence.
Gates S, Smith LA, Foxcroft DR.
Warwick Medical School, University of Warwick, Warwick Emergency Care and Rehabilitation, Coventry CV4 7AL, Coventry, UK, CV4 7AL.
s.gates@warwick.ac.uk
BACKGROUND: Auricular acupuncture (insertion of acupuncture into a number, usually five, of specific points in the ear) is a widely-used treatment for cocaine dependence. OBJECTIVES: To determine whether auricular acupuncture is an effective treatment for cocaine dependence, and to investigate whether its effectiveness is influenced by the treatment regimen. SEARCH STRATEGY: We searched the Cochrane Central Register of Controlled Trials (The Cochrane Library Issue 3, 2004); MEDLINE (January 1966 to October 2004) , EMBASE (January 1988 to October 2004); PsycInfo (1985 to October 2004); CINAHL (1982 to October 2004); SIGLE (1980 to October 2004) and reference lists of articles. SELECTION CRITERIA: Randomised controlled trials comparing a therapeutic regimen of auricular acupuncture with sham acupuncture or no treatment for reduction of cocaine use in cocaine dependents. DATA COLLECTION AND ANALYSIS: Two authors independently extracted data from published reports and assessed study quality using the Drug and Alcohol CRG checklist. All authors were contacted for additional information; two provided data. Separate meta-analyses were conducted for studies comparing auricular acupuncture with sham acupuncture, and with no treatment. For the main cocaine use outcomes, analyses were conducted by intention to treat, assuming that missing data were treatment failures. Available case analyses, using only individuals who provided data, were also conducted. MAIN RESULTS: Seven studies with a total of 1,433 participants were included. All were of generally low methodological quality. No differences between acupuncture and sham acupuncture were found for attition RR 1.05 (95% CI 0.89 to 1.23) or acupuncture and no acupuncture: RR 1.06 (95% CI 0.90 to 1.26) neither for any measure of cocaine or other drug use. However, the number of participants included in meta-analyses was low, and power was limited. Moderate benefit or harm is not ruled out by these results. Methodological limitations of the included studies may have also made the results open to bias. AUTHORS' CONCLUSIONS:
There is currently no evidence that auricular acupuncture is effective for the treatment of cocaine dependence. The evidence is not of high quality and is inconclusive. Further randomised trials of auricular acupuncture may be justified.
And on IBS:
Cochrane Database Syst Rev. 2006 Oct 18;(4):CD005111.
Acupuncture for treatment of irritable bowel syndrome.
Lim B, Manheimer E, Lao L, Ziea E, Wisniewski J, Liu J, Berman B.
AUTHORS' CONCLUSIONS: Most of the trials included in this review were of poor quality and were heterogeneous in terms of interventions, controls, and outcomes measured. With the exception of one outcome in common between two trials, data were not combined. Therefore, it is still inconclusive whether acupuncture is more effective than sham acupuncture or other interventions for treating IBS.
And insomnia:
Cochrane Database Syst Rev. 2007 Jul 18;(3):CD005472.
Acupuncture for insomnia.
Cheuk DK, Yeung WF, Chung KF, Wong V.
AUTHORS' CONCLUSIONS: The small number of randomised controlled trials, together with the poor methodological quality and significant clinical heterogeneity, means that the current evidence is not sufficiently extensive or rigorous to support the use of any form of acupuncture for the treatment of insomnia. Larger high quality clinical trials employing appropriate randomisation concealment and blinding with longer follow-up are needed to further investigate the efficacy and safety of acupuncture for the treatment of insomnia.
And epilepsy:
Cochrane Database Syst Rev. 2006 Apr 19;(2):CD005062.
Acupuncture for epilepsy.
Cheuk DK, Wong V.
AUTHORS' CONCLUSIONS: The current evidence does not support acupuncture as a treatment for epilepsy. Much larger high quality clinical trials employing appropriate controls are needed.
Here's something on alcohol withdrawal:
Alcohol Clin Exp Res. 2007 Mar;31(3):436-42.
Ear acupuncture for alcohol withdrawal in comparison with aromatherapy: a randomized-controlled trial.
Kunz S, Schulz M, Lewitzky M, Driessen M, Rau H.
CONCLUSION: The results do not support the assumption of a superiority of acupuncture over the control therapy in its specific effects on alcohol withdrawal symptoms.
And another:
Alcohol Alcohol. 2003 Jul-Aug;38(4):369-75.
Acupuncture for alcohol withdrawal: a randomized controlled trial.
CONCLUSIONS: The data from this pilot trial do not suggest a relevant benefit of auricular laser acupuncture for alcohol withdrawal. A larger trial including adequate sham interventions is needed, however, to reliably determine the effectiveness of any type of auricular acupuncture in this condition.
Opiate withdrawal:
J Subst Abuse Treat. 2009 Apr;36(3):345-9. Epub 2008 Nov 12.
Auricular acupuncture as an adjunct to opiate detoxification treatment: effects on withdrawal symptoms.
Bearn J, Swami A, Stewart D, Atnas C, Giotto L, Gossop M.
Auricular acupuncture had no effect upon withdrawal severity or craving when provided as an adjunct to a standard methadone detoxification treatment. The results are consistent with the findings of other studies that failed to find any effect of acupuncture in the treatment of drug dependence. The failure to find any clinical gains from the adjunctive use of auricular acupuncture during detoxification from opiates raises concerns about the widespread acceptance of this intervention.
At this point, fingers become sore from searching and the desire for a reason to keep looking for efficacy becomes more pointed. Enthusiasts, guide me to the positive data? Or can we tentatively conclude the therapy in question is nontoxic because it is nonactive?