Fecha de publicación: -- Fuente: Asqueous Extraction Byproducts Biosensors and drug delivery systems are two quickly developing fields at the nexus of biomedical engineering, nanotechnology, and biomaterials research. Both aim to improve diagnostic sensitivity and treatment precision, tackling important issues in real-time health monitoring and personalized medicine. Polymers, liposomes, hydrogels, and nanoparticles are examples of engineered carriers that are used in drug delivery systems to administer therapeutic compounds in a sustained, targeted, and regulated way. These systems enhance drug bioavailability, reduce systemic toxicity, and allow localized treatment through processes like diffusion, degradation, and environmental responsiveness. In order to match therapy with changing physiological demands, recent advancements in stimulus-responsive and intelligent delivery systems enable on-demand release that is triggered by pH, temperature, enzyme activity, or external inputs like magnetic or light stimuli. The detection of biomarkers, pathogens, or metabolic analytes with high specificity and sensitivity is made possible by biosensors, which are analytical tools that transform biological recognition events into quantifiable signals. Contemporary biosensors combine transducers based on electrochemical, optical, or piezoelectric principles with biorecognition components (enzymes, antibodies, and nucleic acids). By boosting surface area, electron transfer efficiency, and biostability, the use of nanomaterials and biocompatible polymers has greatly improved sensor performance. Real-time early disease detection and ongoing health monitoring have been made possible by the combination of biosensors with wearable and implantable technology. Current developments place a strong emphasis on combining drug delivery and biosensing capabilities into cohesive “theranostic” platforms that can perform feedback-controlled drug release, targeted therapy, and diagnosis all at once. These hybrid systems use micro/nanofabrication and artificial intelligence (AI) to provide precision control, customization, and flexibility. The basic ideas, material design approaches, mechanisms, and translational applications of these systems are examined, highlighting their revolutionary potential in next-generation healthcare, where intelligent, responsive biomaterials combine diagnostics and therapy to produce genuinely customized, adaptable medical solutions.