Recent Developments in Microneedle Technology and Its Diverse Biomedical Applications

Technology

Microneedle (MN) technology has revolutionized transdermal drug delivery by bridging the gap between invasive injections and inefficient topical formulations. Traditional oral and parenteral routes often suffer from limitations such as poor bioavailability, first-pass metabolism, pain, and the need for skilled administration. Microneedles, by contrast, enable minimally invasive, painless, and precise delivery of therapeutic molecules, vaccines, and diagnostic agents directly through the skin. The development of microneedles has been propelled by advancements in polymer science, microfabrication, and nanotechnology. This review provides a comprehensive analysis of recent progress in microneedle design, materials, fabrication techniques, and their expanding biomedical applications, including drug delivery, vaccination, biosensing, and cancer therapy. It also discusses toxicity evaluations, regulatory challenges, and future prospects for clinical translation of MN-based systems. Microneedle (MN) technology has emerged as a transformative platform in modern biomedical science, offering minimally invasive, painless, This review summarizes the latest developments in solid, coated, hollow, dissolving, and hydrogel-based microneedles, highlighting progress in microfabrication, biocompatible polymers, and smart responsive systems. Furthermore, we explore the broad and rapidly growing spectrum of biomedical applications, including transdermal drug delivery, vaccine administration, biosensing, cosmetic treatments, and regenerative medicine.

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