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Early developments
Tobacco had already long been used in the Americas by the time European settlers arrived and introduced the practice to Europe, where it became popular. At high doses, tobacco can become hallucinogenic[citation needed]; accordingly, Native Americans did not always use the drug recreationally. Instead, it was often consumed as an entheogen; among some tribes, this was done only by experienced shamans or medicine men.[citation needed] Eastern North American tribes would carry large amounts of tobacco in pouches as a readily accepted trade item and would often smoke it in pipes, either in defined ceremonies that were considered sacred, or to seal a bargain[9], and they would smoke it at such occasions in all stages of life, even in childhood[10]. It was believed that tobacco was a gift from the Creator and that the exhaled tobacco smoke was capable of carrying one's thoughts and prayers to heaven[11].