Drug use has invaded all associated human spaces, including the school. In this sense, this study analyzed the preparation of teachers who work in an Amazonas state high school to deal with drugged students in the classroom. The methodological strategy used was the survey, operationalized with the aid of a script of semi-structured interviews, in which the respondents were four teachers from a municipal high school who participated in experiences of having students drugged in the classroom, whose data were organized and interpreted with the aid of semantic and content analysis techniques. The results showed that a) students already arrive in the classroom on drugs, despite the report of a case where the student was drugged during class, b) meekness and aggression, each in its own way, are the most common behaviors. c) teachers bring knowledge of the school administration to occurrences only when the inconvenience caused by the presence of the drugged student in the classroom is high and d) the consequences of this action were the disappearance of students from school, being the only case of success reported due to the chance knowledge of a social worker who took the situation for herself. The conclusion shows that the teachers of the researched school are not prepared to deal with the situation of drugged students in the classroom.