Patient-Initiated Brief Admission (PIBA) is perceived as a constructive intervention. It remains uncertain whether PIBA contributes to healthier behaviors among its users. To comprehend patients' motivation to engage in health-promoting behaviors, it is essential to understand how various nursing interventions influence the behavior-specific thoughts and feelings that lead to healthy behaviors. By integrating the theoretical concepts within the health promotion model, we can gain a better understanding of how PIBA as an intervention impacts health-promoting behaviors. Thus, the aim of this study is to describe PIBA users' perspectives on health-promoting behaviors based on Pender's health promotion model. Data were collected through semi-structured interviews with 20 PIBA users, and analyzed through directed content analysis based on Pender's health promotion model. The results illustrate that PIBA users experienced that access to and confidence in PIBA, interpersonal support, and help building self-efficacy promoted health-related behaviors. Deficiencies in PIBA's environmental impact and high internal and external demands were conditions counteracting health-related behaviors. Thus, PIBA has the potential to promote health-related behaviors among its users. However, health professionals need to be mindful of factors that counteract health-related behaviors and should strive to minimize these for PIBA to function fully and guide patients toward healthier behaviors.