Almost all the patients are consumers of basic paste of cocaine (which is highly toxic and alenating), together with alcohol and marijuana. On average they have been taking drugs for 10-15 years. Among the drug-addicted patients, 18% finished the treatment and stayed on average nine months (ranging from 6 to 14 months). More than half of the patients left within the first 3 months against the advice of the therapists. As the treatment is refined, the % of escapes has decreased significantly. The trial week with emetic plants has allowed a natural selection of the most highly motivated. It is usually agreed that 5 years abstinence is the minimum necessary to know if someone is really free of drugs. That is why the evaluation realized during Takiwasi frist two and a half years is based on other criteria such as patient's evolution in relation to himself, his family and society. The treatment proposed by Takiwasi consists of a radical change in life-style and is for that reason a long and evolutionary process.