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Surface modification strategies for high-dose dry powder inhalers

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Abstract

Background

There is a growing interest in the use of dry powder inhalers (DPIs) for administering high-dose drugs with low potency to the lungs as carrier-free formulations to treat both local pulmonary and systemic diseases. The main purpose of particle engineering and formulation design in the development of high-dose DPIs without carrier is to reduce the cohesive property of the particles and overcome the large inter-particulate interaction while enhancing powder dispersion and lung delivery upon inhalation and maintaining stability without agglomeration during storage. In particular, the cohesive property of high-dose DPIs can induce several physiological and physicochemical problems that must be improved.

Area covered

This review describes various particle surface modification methods, including sophisticated particle engineering (such as micronization) and formulation techniques, which are utilized to overcome the problems associated with high-dose DPIs.

Expert opinion

Currently, changing the cohesive property of particles through various micronization processes and improving the surface properties of particles through co-processing with limited excipients have been mainly used as efficient methods for particle surface modification. Using these technological principles, novel approaches have been attempted to develop inhalable drug particles, such as high-dose antibiotics and high-value biopharmaceuticals. The research on high-dose DPIs has expanded widely, and consequently, the drugs that received recent regulatory approvals have been successful based on the research results. Thus, it is expected that the next generation of DPIs will be safer and have higher therapeutic efficacy beyond the limitations of traditional high-dose DPIs.

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Acknowledgements

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (Grant No. 2020R1A2C4002166). This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (Grant No. 2020R1I1A1A01074378). I would like to thank Sebin Kim for helping search for literature with this review paper.

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  1. College of Pharmacy, Duksung Women’s University, 33, Samyangro 144-gil, Dobong-gu, Seoul, 01369, Republic of Korea

    Heejun Park

  2. College of Pharmacy, Pusan National University, 2, Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan, 46241, Republic of Korea

    Eun-Sol Ha & Min-Soo Kim

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  1. Heejun Park
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Park, H., Ha, ES. & Kim, MS. Surface modification strategies for high-dose dry powder inhalers. J. Pharm. Investig. 51, 635–668 (2021). https://doi.org/10.1007/s40005-021-00529-9

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