The following definitions apply
1° Drug dependence: a set of behavioural, cognitive and physiological phenomena of varying intensity, in which the use of one or more psychoactive substances becomes a high priority, the essential characteristics of which are the obsessive desire to obtain and take the substance or substances in question and the constant search for them; the state of dependence may result in the self-administration of these substances in doses producing physical or behavioural changes which constitute public health problems;
2° Abuse of a psychoactive substance: the excessive and voluntary, permanent or intermittent use of one or more psychoactive substances, with harmful consequences for physical or mental health;
3° Serious pharmacodependence or serious abuse of psychoactive substances, pharmacodependence or abuse of psychoactive substances which is either lethal or likely to endanger life or lead to invalidity or incapacity, to cause or prolong hospitalisation or to manifest itself by a congenital anomaly or malformation;
4° Misuse, the consumption of a medicinal product for recreational purposes, as well as its prescription, trade or any other use for fraudulent or lucrative purposes.