I-acupuncture. Ubufakazi bamanje besayensi bukhombisa ukuthi ukutshopa akusebenzi njenge-placebo ekusizeni ekuhoxisweni kwe-cocaine. Lesi sitatimende sisekelwe ezifundweni ezine ezingahleliwe, ezilawulwa yi-placebo ezishicilelwe phakathi kuka-1999 no-2002.5-8 . Olunye lwalezi zifundo lubandakanya abantu abadala abangama-620 abayimilutha ye-cocaine5. Ngokocwaningo lwethu, umphumela wokwelapha wabonwa kuphela phakathi nocwaningo olulodwa, oluhilela abantu abangu-82 abathembele.9.