2010 · 23 citations · 13 references
PharmacyPharmaceuticsPharmacologyBioavailabilityDrug DeliveryPharmaceutical FormulationDrug Delivery SystemsDrug EncapsulationDrug FormulationNasal Drug DeliveryNasal FormulationsOral NanocarriersDrug Loading AnalysisDrug Loading EffectsGel StrengthGelationGelation TemperatureNasal Gel FormulationsNasal GelsThermoresponsive Gels
The purpose of the present investigation was to prepare and evaluate thermo reversible formulations of flunarizine hydrochloride for improved drug residence time in the nasal cavity. The formulations so prepared were in the liquid state at 4°C while turned into a gel at the temperature of the nasal cavity. Poloxamer 407 was used as the polymer which exhibited the phase transition behavior. Inclusion complexes using β‐CD were prepared for increasing the solubility of flunarizine in nasal secretions. The prepared formulations were characterized for drug loading, content uniformity, in‐vitro drug diffusion, bioadhesion strength, gel strength, viscosity, inflection and gelation point. The formulations exhibited drastic increase in the viscosity at the temperature of 37°C indicating their possible use as in‐situ gelling systems. Out of all the formulations studied the β‐CD formulations shows the fastest release, possibly due to increase in the solubility and dissolution rate of flunarizine Hydrochloride.
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Thermoreversible-mucoadhesive Gel for nasal delivery of sumatriptan
Rita Majithiya, Pradip Kumar Ghosh, Manish Umrethia et al. · AAPS PharmSciTech · 2006 · 226 citations · Full text