Formulation and in-vitro evaluation of directly compressed controlled release matrices of Losartan Potassium using Ethocel Grade 100 as rate retarding agent

[Display omitted] Current study was aimed to develop 200mg controlled release matrix tablets of Losartan Potassium using Ethocel 100 Premium and Ethocel 100 FP Premium as rate controlling polymer. In-vitro studies were performed according to USP Method-I in phosphate buffer (PH 6.8) using pharma tes...

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Bibliographic Details
Published in:International journal of pharmaceutics 2015-12, Vol.496 (2), p.759-765
Main Authors: Khan, Kamran Ahmad, Khan, Gul Majid, Zeeshan Danish, Muhammad, Akhlaq, Khan, Haroon, Rehman, Fazal, Mehsud, Saifullah
Format: Article
Language:English
Subjects:
Cellulose - analogs & derivatives
Chemistry, Pharmaceutical
Controlled release
Delayed-Action Preparations
Ethocel grade 100
Losartan - chemistry
Losartan Potassium
Matrix tablets
Solubility
Tablets
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Summary:[Display omitted] Current study was aimed to develop 200mg controlled release matrix tablets of Losartan Potassium using Ethocel 100 Premium and Ethocel 100 FP Premium as rate controlling polymer. In-vitro studies were performed according to USP Method-I in phosphate buffer (PH 6.8) using pharma test dissolution apparatus. The temperature of the dissolution medium was kept constant at 37±0.5°C at 100rpm. Flow properties, physical quality control tests, effect of polymer size and drug-to-polymers ratios were studied using different kinetics models such as 1st-order, zero-order, Hixon Crowell model, Highuchi model and Power law. Difference factor f1 and similarity factor f2 were applied for dissolution profiles against Cardaktin® tablets used as a reference formulation. The matrices with polymer ethocel 100 FP Premiums have prolonged the drug release rate as compared to polymer ethocel 100 Premiums. The n values matrices with polymer ethocel grade 100 ranged from 0.603 to 0.857 indicating that the drug release occurred by anomalous non fickian diffusion kinetics while then value of reference Cardaktin® tablet was measured as 0.125 indicating that these tablets do not follow power law. The dissolution profiles of test formulations were different than that of reference Cardaktin®. This suggests the polymer Ethocel grade 100 can be proficiently incorporated in fabrication and development of once a day controlled release matrix tablets.
ISSN:0378-5173
1873-3476
DOI:10.1016/j.ijpharm.2015.10.051