 Transdermal drug delivery is a promising approach for administering medication through the skin. One way to do this is via micro needles, which are small needles made of polymer blends that can be used to penetrate the skin and deliver drugs. In this study, researchers investigated the effectiveness of various polymer blend ratios in creating micro needles with desirable properties such as regular surface morphologies, high thermal decomposition and melting temperatures, and good formability. They found that a 10% polyvinyl pyrrolidone, PVP, slash 2% sodium carboxymethylcellulose, CMCNA, ratio produced the best results. This combination of polymers resulted in micro needles with good formability in other desired properties, making them suitable for transdermal drug delivery applications. This article was authored by Na Chang, Zhu Lu, Ming Lu, and others.