Brief Explanation
Microneedles are micron-sized needles made of various materials and shapes, ranging in height from 25 to 2000 μm. The application of microneedles to the skin can create micron-sized transport pathways that allow for enhanced transdermal delivery of a wide variety of active pharmaceutical ingredient molecules. Microneedles provide controlled drug release as a drug delivery system for small drug molecules, active pharmaceutical ingredients, nanoparticles, and macromolecules such as peptides, proteins, and nucleic acids. More importantly, the size of the drug molecule is not a limiting factor for their administration. The transdermal route is used for the sustained release of the active pharmaceutical ingredient molecules from the skin surface to the body and overcomes the problems associated with oral administration.