Dyspnea testifies to profound suffering in patients and its relief is a priority for caregivers. This can be achieved by correcting causative disorders ("etiopathogenic" approach) or targeting the dyspnea itself ("symptomatic" approach), as is done for pain. Empathetic solicitude from caregivers has an intrinsic analgesic effect, but its effects on dyspnea have not been formally documented. This study tests the hypothesis that the empathetic solicitude behavior of a caregiver during experimental induction of acute and intense dyspnea would have a mitigating effect. In a double-blind, randomized, controlled experimental trial, 80 healthy participants were assigned to a neutral behavior arm or a solicitude behavior arm. During two successive visits (V1 and V2), dyspnea was induced through CO