Drug repurposing, identifying new therapeutic uses for existing drugs, has emerged as a crucial and promising strategy in the urgent fight against autoimmune disorders. This chapter aims to instill hope and optimism by exploring the potential of drug repurposing to offer rapid and cost-effective solutions to the complex and multifaceted nature of autoimmune diseases. Leveraging established pharmacological profiles and clinical data, repurposed drugs can bypass many early stage developmental hurdles, expediting the path to clinical application. We delve into the mechanisms by which repurposed drugs can modulate immune responses, highlighting several inspiring success stories. These stories demonstrate how drugs originally developed for other indications have shown efficacy in treating autoimmune conditions, such as rheumatoid arthritis, multiple sclerosis, and systemic lupus erythematosus, and they are intended to inspire and motivate. Key examples include the use of antimalarial drugs like hydroxychloroquine in lupus and the employment of JAK inhibitors, initially designed for cancer therapy, to manage rheumatoid arthritis. Furthermore, this chapter underscores the pivotal role of computational tools and bioinformatics in identifying candidate drugs for repurposing. These tools empower researchers to uncover novel drug-disease associations and are intended to inform and enlighten. Through comprehensive case studies and an overview of the current landscape, this chapter aims to provide a detailed understanding of the potential and limitations of drug repurposing in the fight against autoimmune diseases, ultimately contributing to more effective and personalized treatment options for patients.