Abstract
This article provides a review of the critical in vitro assays utilized in transdermal drug development. In vitro assays such as percutaneous absorption testing and dissolution (drug release) testing are powerful tools for screening potential transdermal compounds and drug quality control, respectively. Several 2D single-cell cultures and 3D human skin equivalents are available for screening compounds with low irritation and sensitization potential. The role of each assay and its limitations and challenges will be further discussed below.
Financial & competing interests disclosure
The authors have no relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript. This includes employment, consultancies, honoraria, stock ownership or options, expert testimony, grants or patents received or pending, or royalties.
No writing assistance was utilized in the production of this manuscript.