A Review on Intranasal Drug Delivery System
Delivery of drugs through nasal route has been potentially explored as an alternative route for administration of vaccines and biomolecules such as proteins, peptides and non peptide drugs, hence it has attracted the interest of scientific community. Inranasal therapy has been accepted form of treatment in the ayurvedic system of medicines. Nasal route is beneficial for the drugs which are unstable on oral administration because they are significantly degraded in GIT or metabolized by first pass effect in liver. Nasal route is alternative to parenteral therapy and also useful for long term therapy. Nasal mucosa is highly vascularised and most permeable giving rapid absorption and onset of action. Nasal route is non invasive, widely used for the local treatment may also be used for systemic therapy as drug directly goes in systemic circulation. Nasal route gives good absorption of small molecules, than that of large molecules can be increased by absorption promoters. In this article an overview of intranasal drug delivery with its various aspects like factors affecting nasal absorption, strategies to improve bioavailability are discussed.
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