scholarly journals Formulation and in-vitro evaluation of theophylline sustained release tablet

2019 ◽  
Vol 9 (1-s) ◽  
pp. 48-51
Author(s):  
Ravi U Gaware ◽  
Sujit T Tambe ◽  
Shankar M Dhobale ◽  
Suresh L Jadhav
Keyword(s):  
Drug Release ◽  
Sustained Release ◽  
Ethyl Cellulose ◽  
Trial And Error ◽  
In Vitro Evaluation ◽  
Sustained Release Tablet ◽  
Release Tablet

The aim of present study was to prepare sustained release tablet of Theophylline so as to prolong its elimination time and at the same time to keep cost of the formulation minimum. In this study ethyl cellulose and Eudragit are used in the formulation to sustain the release of Theophylline. Ethyl cellulose and Eudragit are added at the granulation step to form a sustained release coating around each granule. Different batches were designed one after another on trial and error basis to get the optimum drug release upto 12 hours. Keywords: Theophylline, ethyl cellulose, Eudragit, sustained release, coating, tablet.

scholarly journals FORMULATION AND CHARACTERIZATION OF SUSTAINED RELEASE TABLET USING MARDI GUM

2021 ◽  
pp. 52-55
Author(s):  
MANGESH M KUMARE ◽  
GIRIDHAR R SHENDARKAR
Keyword(s):  
Drug Release ◽  
Sustained Release ◽  
Hydroxypropyl Methylcellulose ◽  
Research Work ◽  
Release Mechanism ◽  
In Vitro Drug Release ◽  
Sustained Release Tablet ◽  
Weight Variation ◽  
Release Tablet

Objective: The present research work was to develop and evaluate alprazolam sustained release tablet using Mardi gum, a comparative study on binding properties of gum and hydroxypropyl methylcellulose (HPMC) was performed. Methods: Formulation of alprazolam tablets (f1–f6) was done by direct compression method using 15%, 30%, and 45% concentration of gum as a natural binder, and HPMC was used as synthetic matrix forming agent. Microcrystalline cellulose was used as diluents, talc, and magnesium stearate as a lubricant and PVP K30 as the binder. The formulated batches were evaluated for parameters such as tablet thickness, % friability, hardness, weight variation, and in vitro drug release characteristics. The release information was fitted into different dynamics models to decide the release mechanism of the drug. Results: The results showed that all the parameters of the developed tablets (f1–f6) were in fulfillment with pharmacopeia limits. In vitro, drug release studies showed that formulation f1 had most controlled and sustained manner releaser with maximum drug release of 97.89±0.52% in 18 h with comparison to f2–f4 and f6 drug release is 98.12±0.55%, 97.24±0.57%, 98.16±0.74%, and 97.26±0.35%, respectively, in 16 h and f5 giving 97.89±0.85% release in 14 h. Conclusion: On the basis of obtained result, it can be concluded that Mardi gum can be used to sustain the drug release as a natural polymer in tablet dosage form.

FOMULATION OF SALBUTAMOL SUSTAINED RELEASE TABLET

2011 ◽  
pp. 42-47
Author(s):  
Keyword(s):  
Drug Release ◽  
Sustained Release ◽  
Potassium Chloride ◽  
Ethyl Cellulose ◽  
Methyl Cellulose ◽  
Duration Of Action ◽  
The Core ◽  
Sustained Release Tablet ◽  
Coated Tablet ◽  
Release Tablet

Background: Salbutamol, a highly selective beta 2 adrenoceptor agonist with bronchodilating property, is widely used for the management of chronic and acute asthma. The biological half life of drug is about 4.5 hour, hence salbutamol is given orally four times daily to maintain a therapeutic blood level. The aim of recent study was to formulate film coated sustained release tablet for 12-hour duration of action. Materials and methods: The core tablet containing salbutamol sulphate, potassium chloride and lactose were prepared using wet granulation process. The resultant tablets were coated with mixtures of ethyl cellulose and hydroxylpropyl methyl cellulose to control the release of salbutamol. Results: Three formulations of the core were chosen to fabricate salbutamol tablets and the core tablets were coated with polymer at various ratio to core weight to control the drug release. It was found that the core containing 68 mg of potassium chloride and 6 % (W/W) of polymer possessed the drug release similar to that of reference product (Ventolin CR). The drug release kinetic of the experimental product was best fit to zero order. Active ingredient was released out of the coated tablet through pores formed by disolving of hydrophyllic one in mixture of polymer in contact with medium. Conclusion: The mixture of ethyl cellulose and hydroxylpropyl methyl cellulose could be used as coating to control the release of salbutamol. The dissolution of resultant coated tablet was similar to that of Ventolin CR 4 mg. The products were ready to be assessed further by conducting stability testing and bioequivalence evaluation in human volunteers.

scholarly journals Development and In Vitro-In Vivo Evaluation of a Novel Sustained-Release Loxoprofen Pellet with Double Coating Layer

Pharmaceutics ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 260 ◽  
Author(s):  
Dongwei Wan ◽  
Min Zhao ◽  
Jingjing Zhang ◽  
Libiao Luan
Keyword(s):  
Citric Acid ◽  
Drug Release ◽  
Sustained Release ◽  
Release Rate ◽  
Diffusion Rate ◽  
Immediate Release ◽  
Pharmacokinetic Studies ◽  
Release Tablet

This study aimed to develop a novel sustained release pellet of loxoprofen sodium (LXP) by coating a dissolution-rate controlling sub-layer containing hydroxypropyl methyl cellulose (HPMC) and citric acid, and a second diffusion-rate controlling layer containing aqueous dispersion of ethyl cellulose (ADEC) on the surface of a LXP conventional pellet, and to compare its performance in vivo with an immediate release tablet (Loxinon®). A three-level, three-factor Box-Behnken design and the response surface model (RSM) were used to investigate and optimize the effects of the citric acid content in the sub-layer, the sub-layer coating level, and the outer ADEC coating level on the in vitro release profiles of LXP sustained release pellets. The pharmacokinetic studies of the optimal sustained release pellets were performed in fasted beagle dogs using an immediate release tablet as a reference. The results illustrated that both the citric acid (CA) and ADEC as the dissolution- and diffusion-rate controlling materials significantly decreased the drug release rate. The optimal formulation showed a pH-independent drug release in media at pH above 4.5 and a slightly slow release in acid medium. The pharmacokinetic studies revealed that a more stable and prolonged plasma drug concentration profile of the optimal pellets was achieved, with a relative bioavaibility of 87.16% compared with the conventional tablets. This article provided a novel concept of two-step control of the release rate of LXP, which showed a sustained release both in vitro and in vivo.

DESIGN DEVELOPMENT AND OPTIMIZATION OF A SUSTAINED RELEASE TABLET OF BOSENTAN MONOHYDRATE FOR PULMONARY ARTERIAL HYPERTENSION

INDIAN DRUGS ◽  
2019 ◽  
Vol 56 (03) ◽  
pp. 61-67
Author(s):  
P. P Dighe ◽  
H. M Tank ◽  
Keyword(s):  
Pulmonary Arterial Hypertension ◽  
Sustained Release ◽  
Arterial Hypertension ◽  
In Vitro Release ◽  
Design Development ◽  
23 Factorial Design ◽  
Sustained Release Tablet ◽  
Pulmonary Arterial ◽  
Release Tablet

Pulmonary arterial hypertension (PAH) means high blood pressure in the lungs caused by obstruction in the small arteries of the lungs.The current study involves the fabrication of oral matrix sustained release tablet of bosentan monohydrate, a dual endothelin receptor antagonist, the optimisation of its in vitro release and characterisation. Methocel K4M PremiumDC2, a directly compressible HPMC grade, has been used as the sustained release polymer. Pregelatinised starch is used as a diluent and release modifier and sodium lauryl sulphate as a solubiliser. The influence of the above variables on drug release is measured using a 23 factorial design using design expert software. Surface response plots show significant interaction among the formulation variables, thus aiding in optimization of bilayer tablet.

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