Dear Colleagues,

Nearly 25 years on from the publication of the first paper on microarray patch-mediated drug delivery, the field is now tantalisingly close to achieving a commercial product. The World Economic Forum for instance has listed microarray patches as one of the Top Ten Emerging Technologies in 2020. This is owing to the number of advantages microarray patches can offer over the current routes of drug administration, such as the ability to avoid first-pass metabolism and gastrointestinal degradation, pain-free administration and avoidance of needle-stick injuries common with hypodermic syringes. To date, the transdermal delivery of both small and large molecules for therapeutic applications has been investigated using hollow, coated, dissolving, hydrogel-forming and porous microarray patch designs. Therefore, the aim of this Special Issue is to provide insights into the current and future developments of microarray patch-mediated transdermal drug delivery and how this can truly achieve patient and commercial benefits. In this Special Issue, original research articles and reviews are welcome. Research areas may include (but are not limited to) scalable manufacturing methods to aid commercialisation, delivery of biologics, development approaches to achieve long-acting transdermal drug delivery, end-user considerations and product designs.

We look forward to receiving your contributions.

Dr. Ana Sara Cordeiro
Dr. Aaron Hutton
Guest Editors

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• microarray patches
• manufacturing methods
• biotherapeutic agents
• long-acting transdermal drug delivery
• end-user microarray patch designs