Formulation, optimization and evaluation of levocetirizine dihyrochloride oral thin strip
Abstract
The aim of present research was to develop a fast releasing oral polymeric film, with good mechanical properties, instant disintegration and dissolution, producing an acceptable taste when placed on tongue. Solvent casting method was used to prepare oral films. Levocetirizine dihydrochloride, an antihistaminic was incorporated to relieve the symptoms of allergic rhinitis. The polymers selected were HPMC E 15 and PVA. Propylene glycol was the plasticizers used. Nine batches of films with drug were prepared using different combinations of polymers and plasticizer concentration. The resultant films were evaluated for weight variation, content uniformity, folding endurance, thickness, surface pH, in vitro disintegration and in vitro dissolution. The optimized films which disintegrated in less than 30 sec, releasing 85-98% of drug within 2 minutes. The percentage release was varying with concentration of plasticizer and polymer. The films made with HPMC: PVA (1:2) released 96% of drug in 1 min, which was the best release amongst all.
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