Poor adherence to treatment is a worldwide problem of striking magnitude that threatens efficacy of therapy. This problem is of particular importance in the case of chronic diseases. The drug-intake behaviour has been shown to be a major determinant in therapeutic variability. Because of its random features, the adherence can be described using stochastic and statistical methods to quantity its effect for optimization of drug administration strategy. This event is aimed to gather various visions and approaches for drug intake behaviour, in terms of data acquisition and processing.