OneStep@Atime responds to the need to have an instrument that homogenizes contents, methodologies and practices in the field of planning interventions to reduce the demand for drugs. In this sense, it is not a manual but a guide that divides the planning process into seven sequential and complementary phases where the information is detailed: the process to be followed, the links of interest and the necessary tools to prepare a project or an intervention. In short, it offers an informative and work space for its planning.