Stimuli Responsive Drug Delivery System In (PH, Temperature, Enzyme)

Stimuli Responsive Drug Delivery System (SRDDS) are advanced pharmaceutical Platforms designed to deliver drugs in controlled, site-specific and time-dependent manner in response to physiological stimuli such as PH, temperature, enzymes. These systems address the limitations and enzymes of conventional dosage forms. These system explores the development and application of smart nanocarriers engineered by enhancing therapeutic efficacy, minimizing systemic toxicity and improving patient compliance.This review focuses on PH, temperature and enzymes to release therapeutic payloads in response to specific physiological triggers: pH gradients,Tempertaure fluctuations and enzymatic activity. By leveraging and distinct biochemical environment of pathological sites – such as the localized hyperthermia of inflammed tissues,or the overexpressed enzymes in specific metabolic disorders –these systems ensure site specific release while minimizing target toxicity.The chemical  architectures of these platforms ,including pH-sensitive polymers, thermo hydrogels and enzyme-cleavable linkers. The integration of these stimuli allows for a programmable, “lock-and-key” delivery mechanism