In- Situ Nasal Gel: A Review

Nasal therapy also called "Nasya Karma" has been recognized form of treatment in the Ayurvedic. System of Indian Medicine. Nowadays many drugs have better systemic bioavailability through nasal route as compared to oral administration. The nose is also considered an attractive route for needle-free vaccination and for systemic drug delivery, especially when rapid absorption and effect are desired. The nasal delivery is a feasible alternative to oral or parenteral administration for some drug because of the high permeability of the nasal epithelium, rapid drug absorption across this membrane and avidance of first pass metabolism. Prolonged drug delivery can be achieved by various new dosage forms like in-situ gel. In-situ forming polymeric formulation are drug delivery system that is in sol form before administration in the body, but once administered, undergoes gelation in-situ to form a gel. In-situ nasal drug delivery system is the type of mucoadhesive drug delivery system. Now a days insitu gel has been used as vehicle for the drug delivery of the drug for both local treatment and systemic effect. In-situ nasal gel drug delivery system is advantageous over the conventional drug delivery system like sustained and prolonged release of drug, reduced frequency of administration, improved patient compliance and comfort.