Improvement of lidocaine skin permeation by using passive and active enhancer methods

Hasanpour, Feria and Budai-Szűcs, Mária and Kovács, Anita and Ambrus, Rita and Jójártné Laczkovich, Orsolya and Cseh, Martin and Geretovszky, Zsolt and Ayaydin, Ferhan and Berkó, Szilvia (2024) Improvement of lidocaine skin permeation by using passive and active enhancer methods. INTERNATIONAL JOURNAL OF PHARMACEUTICS, 660. No.-124377. ISSN 0378-5173

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Abstract

Lidocaine is generally recognized and preferred for local anaesthesia, but in addition, studies have described additional benefits of lidocaine in cancer therapy, inflammation reduction, and wound healing. These properties contribute to its increasing importance in dermatological applications, and not only in pain relief but also in other potential therapeutic outcomes. Therefore, the purpose of our study was to enhance lidocaine delivery through the skin. A stable nanostructured lipid carrier (NLC), as a passive permeation enhancer, was developed using a 2 full factorial design. The nanosystems were characterized by crystallinity behaviour, particle size, zeta potential, encapsulation efficiency measurements, and one of them was selected for further investigation. Then, NLC gel was formulated for dermal application and compared to a traditional dermal ointment in terms of physicochemical (rheological behaviour) and biopharmaceutical (qualitative Franz diffusion and quantitative Raman investigations) properties. The study also examined the use of 3D printed solid microneedles as active permeation enhancers for these systems, offering a minimally invasive approach to enhance transdermal drug delivery. By actively facilitating drug permeation through the skin, microneedles can complement the passive transport achieved by NLCs, thereby providing an innovative and synergistic approach to improving lidocaine delivery.

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