Objective: The recent study's objective was to optimize and formulate a controlled-release gastro-retentive floating tablet of RG using a central composite design, which provides continuous release of Repaglinide for up to 24 h. Methods: Repaglinide gastro-retentive floating tablet (RG-GRF Tablet) was prepared by direct compression method. The optimization was carried out using a three-factor and three-level Central Composite design. The amount of Eudragit RSPO (A), HPMC K-100M (B) and Sodium bicarbonate (C) were selected as independent variables and the Cumulative % drug release in 1.5 h (DR1.5), Cumulative % drug release in 8 h (DR8), Cumulative % drug release in 24 h (DR24) and Floating lag time (FLT) were used as dependent variables. Results: CCD analysis results shows that predicted and experimental values for optimized formulation were found to be almost similar. Optimized amounts of Eudragit RSPO, HPMC K-100M, and NaHCO3 were 14.351 mg, 44.438 mg, and 10 mg, respectively, with the highest possible desirability value of 0.898. The experimental values at optimized preparation conditions were found to be DR1.5 is 30.68%, DR8 is 64.90%, DR24 is 96.54%, and FLT is 4.41 min. The release data from the optimized formulation were closely matched with the Korsmeyer-Peppas model and in vitro drug release studies indicated that the RG-GRF Tablet continuously releases the drug for 24 h in a controlled manner. Conclusion: Current research concludes that RG-GRF Tablets provide drug release for up to 24 h, and the derived central composite design can be used for forecasting the DR1.5, DR8 and DR24 as well. RG can also be made more bioavailable by extending the gastric residence time.
The recent study's objective was to prepare and evaluate the Repaglinide (RG) solid dispersion. RG is poorly water soluble, BCS class II drug. Repaglinide solid dispersion (RG-SD) was prepared by solvent evaporation method using different proportion of PVP K30. The prepared RG-SD was evaluated for solubility studies, drug content, in vitro dissolution, DSC studies and XRD studies. DSC and XRD studies results indicate that RG exists in amorphous form in solid dispersion. The solubility of pure RG was enhanced from 34.41±0.68 to 370.3±1.52 μg/mL in distilled water at 370 C. RG-SD (RG:PVP K30) (1:10) showed high burst release (65%) in the first 30 min. Current research concludes that Repaglinide solid dispersions using PVP-K30 (1:10) as a carrier in solid dispersions showed promising results in enhancement of repaglinide properties. KEYWORDS: Repaglinide, Solid Dispersion, PVK K30, Dissolution Rate, Solvent evaporation
A potent non-sulfhydryl prodrug, trandolapril is transformed into the active substance, trandolaprilat, in the liver. For obese individuals with mild-to-moderate essential hypertension, Trandolapril is effective and safe. The elimination t1/2 of trandolapril and trandolaprilat are approximately 6 hours and 16–24 hours, respectively. The goal of present work is to develop the Trandolapril immediate release tablet using various superdisintegrants. Crospovidone, Sodium starch glycolate and Croscarmellose sodium in concentrations of 2%, 4%, and 6% were used as superdisintegrating agents for the optimization. Direct compression technique was used to make nine formulations (IRTR 1 to IRTR 9). The powder blends of all batches were evaluated for different parameters to know the powder flow characteristics and it was found that the powder blend had excellent flow and compressibility characteristics. Then, compressed tablets were tested for quality control parameters as per the IP. In formulation IRTR1-IRTR9, disintegration time was observed 30.23 to 71.67 Sec and more than 70% drug was released in 30 min. Thus, based on evaluation results, it is concluded that formulation of immediate release (IR) tablets of Trandolapril were successfully developed. Minimum disintegration time 30.23 seconds 90.56% drug release in 30 min was obtained with IRTR3. KEYWORDS: Trandolapril, Immediate release, Crospovidone, Sodium starch glycolate, crocarmellose sodium
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