Nowadays the nasal route has received a great attention as a reliable administration for the systemic administration. In the Department of Pharmaceutical Technology, University of Szeged, the main research work is the design and development of innovative nasal formulations, which can open new possibilities for some well-known agents and may also help some drug-candidates delivery problems. The aim of this work was to present some reliable models for investigation of permeability, such as Spectra/Por Dialisys Membran, ZelluTrans/Roth Mini Dialyzer, μFLUX diffusion Cell, Navicyte Vertical and Horizontal Diffusion Chamber System and In-line Cell. In addition, the horizontal membrane diffusion model (Side-Bi-Side) was used to investigate in vitro and ex vivo studies of permeability of meloxicam in comparison with the vertical diffusion cell (Franz). The present study investigated the meloxicam in different dosage forms (powder, spray, gel). It was found that the Side-Bi-Side cell is suitable to test the nasal formulations, but the uniform distribution of the active substance cannot be ensured in donor place by increasing the viscosity of the compositions, therefore the Franz cell is recommended for investigation of nasal gel. Previous measurement cannot be found related to this topic.