Background: Neurodegenerative disorders such as Alzheimer’s disease, Parkinson’s disease, Multiple Sclerosis, Dementia, and others are becoming more common globally due to people’s changing lifestyles. Furthermore, the presence of the Blood-Brain barrier and other limitations of oral and other routes of administration makes drug delivery to the brain somewhat tricky.As a result, numerous novel drug delivery systems are being developed for drug administration to the brain. However, nose-to-brain administration is one of the most effective, safe, and non-invasive methods.
Purpose: To discuss nose-to-brain deliveryas a novel drug delivery system in the treatment of various brain disorders and to provide information about various formulation strategies designed to deliver the drug to the brain effectively.
Methods: A preliminary search was conducted in the PubMed, OVID Medline, Embase, ScienceDirect, Web of Science, and Google Scholar databases using keywords such as “Intranasal delivery, nose-to-brain drug transport, formulations for intranasal delivery.”
Results: Various marketed formulations for nose-to-brain drug delivery are listed in this review, like naringenin, donepezil, pentamidine, rivastigmine,efavirenz, desvenlafaxine,lamotrigine, haloperidol,nimodipine, olanzapine, valproic acid, ovalbumin,clonazepam,fentanyl citrate, nifedipine in the form of poloxamer chitosan-based nano-formulation, nano-emulsion, chitosan niosomes, chitosan containing emulsion, solid-lipid nanoparticles,PLGA-chitosan nanoparticles, solution, mucoadhesive microemulsion,nanostructured lipid carriers, cationic liposomes,peptide-attached liposomes, multimellar liposomes with their research findings in treating various brain disorders.
Conclusion: This review discusses nose-to-brain drug delivery processes, the pathway for its action, advantages over other delivery routes, barriers to this system, and current formulation strategies for nose-to-brain transport.