In 1997 was realized a anonymous survey via questionnaire among 1567 university students from 6 faculties of Masaryk University in Brno. It was focused on abuse of habit-forming substances and attitudes to them. 75 % of respondents drinks alcoholic beverages once a week at least, 30 % of respondents smokes tobacco once a week at least. From illegal substances are most frequently consumed hemp, hallucinogens, dancing drugs, speed, cocaine and opiates. 80 % of consumption were 1 or 2 experiments, less frequently from 3 to 5, rarely more. Reasons of first drug experiment were most often curiosity, craving for pleasant sensations, need of psychological relaxation and gregariousness. In file of respondents exists a strong contrast among knowledge, risk perception and consequent behaviour. It is necessary to support drug-free zone at the academic ground, promote principles of healthy lifestyle, motivate university students opportunely, help them in their problems.

Key words: questionnaire – habit-forming substances – prevention – program – survey – university – undergraduates