Precision Endocrinology: Pharmacogenomics, Biomarker Discovery, and the Future of Individualized Hormonal Therapy

This chapter reviews the conceptual and practical foundations of precision medicine as applied to endocrinology, with a focus on pharmacogenomic variation in hormone metabolism and drug response, the discovery and clinical translation of endocrine biomarkers, and the emerging role of multi-omics integration in individualizing treatment. Case studies from thyroid hormone replacement, corticosteroid therapy, insulin regimen optimization, and gonadotropin therapy illustrate how precision approaches are beginning to reshape clinical endocrinology. The chapter concludes with a forward-looking discussion of the trajectory of personalized hormonal medicine and the challenges of equitable implementation.