K.V.Ratnamala

Transdermal drug delivery systems (TDDS), particularly in the form of patches, have emerged as a major breakthrough in pharmaceutical science, enabling drugs to be administered directly through the skin in a non-invasive manner. These systems allow controlled and sustained drug release, leading to improved therapeutic efficiency. Unlike conventional oral route Skin, TDDS bypass first-pass metabolism and help maintain consistent plasma drug concentrations. Progress in this field has been driven by the development of innovative materials, novel polymers, advanced permeation enhancers, and smart delivery platforms. The incorporation of nanotechnology has broadened the applicability of TDDS, making it possible to deliver molecules that were previously unsuitable for transdermal administration. Deeper understanding of skin physiology and its barrier functions has facilitated the design of next-generation patches utilizing nanocarriers, microemulsions, and stimuli-responsive polymers. Additionally, approaches such as microneedle arrays, iontophoresis, and sonophoresis have significantly boosted drug permeation across the skin. Several marketed products highlight the practical success of these technologies, while ongoing research continues to refine delivery strategies and evaluation techniques. Overall, the evolution of TDDS has led to more effective, convenient, and patient-friendly therapeutic options, positioning them as a promising platform for addressing complex treatment challenges and catering to diverse healthcare needs in the future.