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The present investigation was aimed to formulate and characterize ion-activated in-situ gel loaded with Rizatriptan Benzoate (RIZ) for intranasal administration for brain targeting. The gel was further optimized for process and formulation parameters by using 32 factorial design. The optimized batch having the concentrations of gellan gum and HPMC E15 LV 33.83 mg and 9.6 mg respectively. Gel strength and mucoadhesive strength of the optimized formulation were found to be 32.54 sec and 2580.50 dynes/cm2 respectively. Moreover, improved in-vitro and ex-vivo release profile of insitu gel were observed in comparison to drug solution. In a nutshell, the developed formulation holds a great promise in overcoming the limitation associated with currently marketed RIZ formulations and illustrates the potential use of ion-activated in-situ gel to administer the drug by nasal route for brain targeting.

Formulation development and characterization of in-situ gel of Rizatriptan Benzoate for intranasal delivery