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Some rituals about a regular consumption of tea, smokeless tobacco (chewing) and milk are described by one of the authors at the time of his anthropological investigation among the Tuaregs of Timbuktu's region (Mali). He carries out some ethnographical and clinical materials which highlight the dependence to these substances and the role of their psychostimulant and anorexigene effects in a society much ritualised. The subject of this article appears original in the literature which approaches more the dependence to coffee than tea, to cigarettes than to chewing tobacco. The observation of daily life of a tuareg encampment shows a ritual consumption of tea at four time a day. The motivations of the Tuaregs are the increase of vigilance and performance with that psychostimulant substance. They describe an intoxication syndrome related to caffeineism, observed among European tourists. The Tuaregs are aware of their addiction to tea and distinguish psychological dependence from physical dependence. The psychological dependence corresponds to a powerful desire to drink tea at ritual moments, while the physical dependence appears at waking-up and when the time of preparing this beverage is too late. The Tuaregs describe also a phenomenon of loss tolerance after an abstinence period. In spite of the maraboutic prohibition to drink tea, which diverts Tuaregs of their religious practice, they defy this ban from the waking-up to take that infusion before the matinal prayer. That addiction appears also in the identity of the Tuaregs who are called "the sons of tea". The consumption of chewing tobacco, mixed with ash, rhythms the daily life. The mean number of chewing is about fifteen by day; every chewing last 30 minutes. The first chewing of the day occurs 15 minutes after waking-up. The Tuaregs use tobacco in order to get relaxation and vigilance. They suggest intoxication symptoms and especially a withdrawal syndrome which appears at the waking-up or after an important interval between chewing. The authors raise the idea about the dependence to this type of tobacco, consistent with the Anglo-Saxon literature of the 80th which tried to implement scales and criteria as to assess the dependence to smokeless tobacco. The Tuaregs could be more addicted than American consumers in regard to american studies: they use more chewing a day and they can't refrain from chewing at the waking-up. Empirical addition of plant ash, made up of hydroxide of calcium, may act a role in pharmacokinetic by alkalinising the pH. It could increase the absorption of nicotine through the mouth mucus membrane. The authors raise the idea about the dependence to the milk, much consumed and ritualised among those nomadic breeders. They rely on the observation of a withdrawal syndrome clearly identified in the tuareg medical nosography. These regular consumptions integrate the daily life within other rituals. Tea and tobacco facilitate certain motor stimulation, a struggle against hunger and some relaxation regarding an hostile environment over climatological, ecological and economical plan. The brutal and unexpected occurring of one of those rituals disrupt, indeed invert, the usual order of social rituals. Those social and religious disruptions materialise the pathological effect of that double dependence to nicotine and caffeine. That one is called by a term which translate its subjective and social appearance, reflecting so the interaction between man, environment and psychoactive substance. This article highlight the importance of cultural factors in the etiopathogeny of poly-dependence among Tuareg subjects. The question about the diagnostic of the dependence in the DSM IV and the CIM-10 is raised. The DSM IV could be completed because it doesn't evoke addiction to caffeine of tea such like it is consumed in West actually. That hermeneutic approach, including anthropological observations and clinical investigations, allow to understand that addiction to psychoactive substances among Tuareg subjects is consistent with their survival in hostile environments.