scholarly journals Preparation of Metformin Hydrochloride Extended Release Matrix Tablets by Direct Compression Method and Its In vitro Evaluation

2014 ◽  
Vol 4 (24) ◽  
pp. 2679-2693 ◽  
Author(s):  
Mohammad Hasan ◽  
Md. Hossen ◽  
Aumit Roy ◽  
Tufikul Islam ◽  
Md. Pathan
Keyword(s):  
Extended Release ◽  
Matrix Tablets ◽  
Metformin Hydrochloride ◽  
Direct Compression ◽  
Compression Method ◽  
In Vitro Evaluation

scholarly journals FORMULATION AND IN VITRO EVALUATION OF SALBUTAMOL SULPHATE AND THEOPHYLLINE EXTENDED-RELEASE TABLETS USING MODIFIED POLYMERS

2018 ◽  
Vol 10 (8) ◽  
pp. 67
Author(s):  
Naveen Goyal ◽  
Anil Kumar
Keyword(s):  
Ethyl Cellulose ◽  
Extended Release ◽  
Research Work ◽  
Drug Dissolution ◽  
In Vitro Dissolution ◽  
Direct Compression ◽  
Compression Method ◽  
Salbutamol Sulphate ◽  
Modified Polymers

Objective: The main objective of this research work was to design, prepare and evaluate extended release (ER) tablets of anti-asthmatic drugs (salbutamol sulphate and theophylline) by direct compression method using diverse ratios of hydroxypropyl methylcellulose (HPMC K100M) and ethyl cellulose (EC) along with some other excipients.Methods: Extended-release matrix tablets of salbutamol sulphate and theophylline were successfully fabricated by direct compression method and coded the formulations as F1 to F7 depending on the ratios of modified polymers. The core tablets composed of hydrophilic polymers of various ratios that allow the discharge of drugs at a controlled rate after coming in contact with the aqueous medium. The designed tablets were subjected to various assessment parameters i.e. friability test, hardness test, drug content consistency and In vitro dissolution tests.Results: Prepared formulations were subjected to various assessment parameters and the findings obtained were within the prescribed limit. To perform the in vitro drug dissolution tests of fabricated tablets, the calibration plots of pure drugs using various solvents i.e. 0.1N HCl, phosphate buffer (pH 6.8) and distilled water were plotted. Dosage forms F1-F7 containing ethyl cellulose and HPMC K100M in various concentration demonstrates the prolonged medications discharge for up to 8 h, among these formulations, F6 shows 95.32±0.24 % for salbutamol sulphate and 94.19±0.39 % for theophylline release at the end of 8 h. This finding reveals that a particular window of concentrations of ethylcellulose and HPMC K100M was capable of providing prolonged drugs discharge.Conclusion: The results obtained in this research work clearly showed a promising potential of extended-release tablets containing a specific ratio of HPMC K100M and ethylcellulose as a release rate controlling polymers for effective treatment of asthma and chronic obstructive pulmonary diseases (COPD).

scholarly journals Formulation and In-vitro evaluation of sustained release matrix tablet of Metformin hydrochloride

2019 ◽  
Vol 9 (3) ◽  
pp. 95-98
Author(s):  
Ravi U Gaware ◽  
Gayatri R Waykar ◽  
Madhuri K Yewale ◽  
Rutuja B Mhaske ◽  
Poonam S Mhaske
Keyword(s):  
Sustained Release ◽  
Ethyl Cellulose ◽  
Metformin Hydrochloride ◽  
High Dose ◽  
Matrix Tablet ◽  
Direct Compression ◽  
Compression Method ◽  
Hydrophilic Matrix ◽  
Compaction Behavior

The low bioavailability and short half-life of Metformin hydrochloride (MH) make the development of sustained-release forms desirable. Present work involves preparation and optimization of sustained release matrix tablet of MH by direct compression method using HPMC K 100 and ethyl cellulose as a matrix forming polymer. Avicel was added as a direct compaction vehicle to improve the compaction behavior of Metformin which otherwise exhibits poor compaction behavior which again is further increased by its relatively high dose. Hydrophilic matrix of HPMC alone resulted in initial burst of Metformin release, however when combined with ethyl cellulose drug release was slowed down and thereafter it became optimal at particular concentration of polymers. Keywords:  Metformin, HPMC, Ethyl cellulose, sustained release, matrix, tablet.

scholarly journals Formulation Development and In Vitro Evaluation of Metformin Hydrochloride Matrix Tablets Based on Hydroxypropyl Methyl Cellulose

1970 ◽  
Vol 1 (1) ◽  
pp. 51-56 ◽  
Author(s):  
Abul Kalam Lutful Kabir ◽  
Tasbira Jeseem ◽  
Rumana Jahangir ◽  
DM Mizanur Rahman ◽  
Abu Shara Shamsur Rouf
Keyword(s):  
Drug Release ◽  
Sustained Release ◽  
Bulk Density ◽  
Methyl Cellulose ◽  
Matrix Tablets ◽  
In Vitro Dissolution ◽  
Metformin Hydrochloride ◽  
Direct Compression ◽  
Drug Content

An attempt was to formulate the oral sustained release Metformin hydrochloride matrix tablets by using hydroxyl methyl cellulose polymer (HPMC) as rate controlling factor and to evaluate drug release parameters as per various release kinetic models. The tablets were prepared by direct compression method. The granules were evaluated for angle of repose, loose bulk density, tapped bulk density, compressibility index, total porosity, drug content etc. and showed satisfactory results. The tablets were subjected to thickness, weight variation test, drug content, hardness, friability and in vitro release studies. The in vitro dissolution study was carried out for 8 hours using United States Pharmacopoeia USP 2 (paddle-type dissolution apparatus) in phosphate buffer (pH 7.4) as dissolution media. All the tablet formulations showed acceptable pharmacotechnical properties and complied with pharmacopoeial specifications. The release mechanisms were explored and explained with zero order, first order, Higuchi, Korsmeyer and Hixson-Crowell equations. The results indicated that a decrease in release kinetics of the drug was observed by increasing the polymer concentration. Kinetic modeling of in vitro dissolution profiles revealed the drug release mechanism ranges from diffusion controlled or Fickian transport to anomalous type or non-Fickian transport, which was only dependent on the type and amount of polymer used. The drug release followed both diffusion and erosion mechanism in all cases. Besides, this study explored both of the optimum concentration and the effect of polymer on drug release pattern from the tablet matrix for 8 hours period. Key Words: Metformin HCl, Sustained release, Hydrophilic matrix, HPMC, Direct compression   doi:10.3329/sjps.v1i1.1808 S. J. Pharm. Sci. 1(1&2): 51-56

Extended release matrix tablets of Stavudine: Formulation and in vitro evaluation

2010 ◽  
Vol 4 (3) ◽  
pp. 219 ◽  
Author(s):  
M Saravanakumar ◽  
N Venkateswaramurthy ◽  
D Dhachinamoorthi ◽  
P Perumal
Keyword(s):  
Extended Release ◽  
Matrix Tablets ◽  
In Vitro Evaluation
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