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We explore the co-construction of objects of care by examining a set of thirteen consultations in addiction care, support, and prevention centers. In such a multidisciplinary system, the care offered is highly fragmented (among a range of professional actors and temporalities), and is constructed through a work of language. This work is the subject of the present article: How do the professional and the patient construct care together? How is the patient’s vulnerability evoked, and how is it treated? Our methodology is based on a dual approach to discourse, both sequential and thematic. This is inspired by conversational analysis and discourse analysis, and enables us to demonstrate how a “focus on substitution treatment,” the central topic of these consultations, functions as a support in the construction of global care. This is constructed as a multiplicity of care objects are split apart and woven together through support, through the availability and adaptability of professionals, and through the routine nature of the interactions involved.