Multimorbidity is often synonym with complexity and generally implies multiple medical treatments. In many cases, treatment guidelines traditionally defined for single conditions are not easily applicable. Primary care for individuals with multimorbidity requires complex patient-centered care and good communication between the patient and the general practitioner (GP). This often includes prioritizing among the different chronic conditions. The burden related to multimorbidity from the GP and the patients' perspective, as well as the prioritization of care between in patients with multimorbidity, has not been studied extensively yet. We report here the preliminary results of a national research aiming at characterizing these aspects in a sample of patients identified through their GP and suffering from at least 3 chronic conditions.