Non-Invasive Strategies for Nose-to-Brain Drug Delivery

Area of Science:

• Pharmacology
• Neuroscience
• Drug Delivery Systems

Background:

• Intranasal drug administration is a potential route for direct brain drug delivery.
• While animal studies show promise, human efficacy for nose-to-brain delivery remains under investigation.

Purpose of the Study:

• To review proposed pathways and barriers for human nose-to-brain drug delivery.
• To discuss drug properties influencing central nervous system (CNS) delivery.
• To summarize clinically tested methods and devices for enhancing intranasal absorption.

Main Methods:

• Literature review of existing studies on intranasal drug delivery to the brain.
• Analysis of drug properties affecting CNS penetration.
• Compilation of data on clinical trials and enhancement techniques.

Main Results:

• Proposed pathways and significant barriers to nose-to-brain drug transport in humans are detailed.
• Key drug characteristics influencing brain uptake are identified.
• Clinically validated methods and devices for improving intranasal drug absorption are presented.

Conclusions:

• Evidence for human nose-to-brain drug delivery is synthesized.
• Factors critical for successful intranasal delivery of drugs to the brain are summarized.