Chronotherapy: maximizing drug efficacy, reducing side effects, and improving patient outcomes through circadian alignment

Our aim in this review is to provide an inclusive overview of the scientific principles, clinical applications, challenges, and prospects of chronotherapy. Circadian rhythms are internal timing systems that govern almost all physiological functions in the human body. Circadian rhythms influence health and illness in a variety of ways, including hormone secretion, blood pressure regulation, drug metabolism, and sleep-wake cycles. The practice of coordinating medical care with these innate biological cycles, or chronotherapy, has become a cutting-edge strategy to increase medication effectiveness, minimize adverse effects, and enhance patient outcomes. This review article examines the science underlying chronotherapy and its use across a variety of therapeutic domains, including cancer, cardiovascular disease, diabetes, asthma, neurological disorders, and psychiatric conditions. The evidence suggests that, by moving away from “one-size-fits-all” dosing and toward customized, rhythm-based care, chronotherapy has the potential to completely transform contemporary medicine.