This article examines how the amplified role of pharmaceutical substances in addiction treatment affects the everyday realisation of care, particularly the relationship between workers and patients, in so called austere environments. Theoretically the article draws firstly on the literature that links pharmaceuticalisation to the neoliberal undoing of central public structures and institutions of care, and secondly on Anne‐Marie Mol's concept of the logic of care. Based on an ethnographic analysis of the everyday life at a Finnish opioid substitution treatment clinic we show the mechanisms through which the realisation of pharmacotherapy can, in the current political climate, result in a very narrow understanding of drug problems and minimal human contact between patients and professionals. Our analysis manifests an important shift in the logic of addiction treatment and health‐care policy more broadly; namely, a growing tendency to emphasise the need for patients to care for themselves and make good choices with limited help from formal care institutions and professionals. We call this new ethos the logic of austerity.