Introduction: Drug is any chemical substance capable of interacting with a living organism and, from the medical point of view, used for the treatment, prevention, cure or diagnosis of diseases.
Objective: To characterize the consumption of toxic substances in adolescents of the "Arístides Viera González" Preuniversity Institute.
Methods: A descriptive-transversal observational study was carried out. The universe consisted of 187 students belonging to the "Arístides Viera González" Preuniversity Institute, in the period January-December 2021.
Results: Female sex predominated (55.08%), being 16 years old the most frequent age (42.9%). In terms of toxic habits, consumers of other toxic substances such as cola predominate (53.47%). 64.17% of students refer that at school they are educated about the damage caused by toxic habits and 42.78% of students agree that the family constantly talks to them about the benefits of leading a healthy life and that if there can be fun without toxic habits.
Conclusions: One of the major public health problems is the consumption of toxic substances. There was a predominance of female students and of students who consume other toxic substances such as cola. Most of the students state that they are educated at school about the harm caused by toxic substances and that the family exerts great influence on them to lead a healthy life. There is a predominance of students who believe that there can be no fun without substances.