Delivery of topical drugs to the olfactory cleft

Espehana, Andreas, Lee, Liam, Garden, Elizabeth Mairenn, Klyvyte, Gabija, Gokani, Shyam, Jegatheeswaran, Lavandan, Wong, Jeremy Jonathan and Philpott, Carl ORCID: (2023) Delivery of topical drugs to the olfactory cleft. Journal of Clinical Medicine, 12 (23). ISSN 2077-0383

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Olfactory dysfunction affects approximately 20% of the population globally, with incidence increasing over the age of 60. The pathophysiology is complex, not yet fully understood, and depends on many factors, including the underlying cause. Despite this, the present literature on olfaction is limited due to significant heterogeneity in methodological approaches. This has resulted in limited effective treatments available for olfactory dysfunction. Medications for olfactory dysfunction can be administered locally (directly to the olfactory epithelium) or systemically (orally or intravenously). Currently, there are various methods for local drug delivery to the olfactory epithelium (nasal drops, nasal sprays, atomisers, pressured meter-dosed inhalers, rinses, and exhalation delivery systems). The aims of this review are to summarise the different methods of drug delivery to the olfactory cleft, evaluate the current literature to assess which method is the most effective in delivering drugs to the olfactory epithelium, and review the medications currently available to treat olfactory dysfunction topically. Going forward, further research is required to better establish effective methods of drug delivery to the olfactory epithelium to treat smell disorders.

Item Type: Article
Additional Information: Publisher Copyright: © 2023 by the authors.
Uncontrolled Keywords: chronic rhinosinusitis,olfaction,olfactory dysfunction,medicine(all) ,/dk/atira/pure/subjectarea/asjc/2700
Faculty \ School: Faculty of Medicine and Health Sciences > Norwich Medical School
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Depositing User: LivePure Connector
Date Deposited: 22 Dec 2023 02:22
Last Modified: 09 Apr 2024 11:30
DOI: 10.3390/jcm12237387


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