scholarly journals Dissolution Enhancement of Rosuvastatin Calcium by Liquisolid Compact Technique

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
V. J. Kapure ◽  
V. V. Pande ◽  
P. K. Deshmukh
Keyword(s):  
Drug Release ◽  
In Vitro Release ◽  
Water Soluble ◽  
Dissolution Enhancement ◽  
Content Uniformity ◽  
Scanning Calorimetry ◽  
Weight Variation ◽  
Liquisolid Compacts ◽  
Rosuvastatin Calcium

In present investigation liquisolid compact technique is investigated as a tool for enhanced dissolution of poorly water-soluble drug Rosuvastatin calcium (RVT). The model drug RVT, a HMG-Co A reductase inhibitor was formulated in form of directly compressed tablets and liquisolid compacts; and studied for in-vitro release characteristics at different dissolution conditions. In this technique, liquid medications of water insoluble drugs in non-volatile liquid vehicles can be converted into acceptably flowing and compressible powders. Formulated systems were assessed for precompression parameters like flow properties of liquisolid system, Fourior transform infra red spectra (FTIR) analysis, X-ray powder diffraction (XRPD), differential scanning calorimetry (DSC), and post compression parameters like content uniformity, weight variation, hardness and friability, disintegration test, wetting time, in vitro dissolution studies, effect of dissolution volume on drug release rate, and estimation of fraction of molecularly dispersed drug in liquid medication. As liquisolid compacts demonstrated significantly higher drug release rates, we lead to conclusion that it could be a promising strategy in improving the dissolution of poor water soluble drugs and formulating immediate release solid dosage forms.

Design and Evaluation of Rectal Suppositories of Carvedilol

2009 ◽  
Vol 2 (3) ◽  
pp. 654-660
Author(s):  
P. V. Swamy ◽  
Laeeq Farhana ◽  
S. B. Shirsand ◽  
Md.Younus Ali ◽  
Ashokgoud Patil
Keyword(s):  
Drug Release ◽  
Significant Degree ◽  
Water Soluble ◽  
In Vitro Dissolution ◽  
Physical Parameters ◽  
Content Uniformity ◽  
Drug Content ◽  
Weight Variation ◽  
Rectal Suppositories

Carvedilol (non-cardio selective b-blocker) is an antihypertensive used in management of hypertension, angina pectoris and heart failure.  But its oral bioavailability is about 25-35% only due to significant degree of first pass metabolism.  It has gastrointestinal side effects such as diarrhea, gastric pain and irritation.  Hence, rectal suppositories of carvedilol were developed by using different water-soluble polymeric bases like gelatin and agar-agar using propylene glycol as plasticizer. The gelatin suppositories were disintegrating/dissolving type while gelatin–agar based suppositories were non-disintegrating/non-melting. All the formulations were evaluated for various physical parameters like weight variation,  drug content uniformity, liquefaction time, micro-melting range, in vitro dissolution, short-term stability and drug-excipient interaction (FTIR).  The mechanism of drug release was diffusion controlled and follows first order kinetics in majority of cases. The results suggested that when gelatin is replaced up to 25% w/w with agar, liquefaction time and drug release were not appreciably affected; higher proportions of agar exhibited incomplete and slow release.  Stability studies conducted at 25±3º C and 60±5% relative humidity for three months indicated that the formulations were stable in the drug-content and in vitro drug release rate (p<0.05).

Formulation and Development of Divalproex Sodium Bi-Layered Tablets using Superdisintegrants and Release Retardant Polymers

2017 ◽  
Vol 10 (2) ◽  
pp. 3669-3675
Author(s):  
Ankit Acharya ◽  
Mohammed Gulzar Ahmed ◽  
Ravi Chaudhari ◽  
Renukaradhya Chitti
Keyword(s):  
Drug Release ◽  
Sustained Release ◽  
In Vitro Release ◽  
Immediate Release ◽  
Physical Parameters ◽  
Content Uniformity ◽  
Divalproex Sodium ◽  
In Vitro Drug Release ◽  
Weight Variation

Divalproex sodium is considered as the most important antiepileptic drug and widely used for treatment of epilepsy and bi-polar disorders and prophylaxis of migraine. The present work has been done to formulate bi-layered tablet of Divalproex sodium containing immediate release layer and sustained release layer. The FTIR study revealed that there was no interaction between drug and polymer and combination. Both layers were prepared by wet granulation technique as poor flow property exhibited by pure drug. The immediate release layer was formulated by using superdisintegrants and evaluated for physical parameters, disintegration time and in vitro drug release. The optimized immediate release layer (IF6) with highest in vitro release of 98.11 was selected for bi-layered tablet formulation. HPMC K4M and HPMC K100M polymer were used to retard the drug release from sustained release layer in different proportion and combination and evaluated for physical parameter along with in vitro drug release studies. The optimized sustained release layer (SF8) which extends the Divalproex sodium release more than 18 hrs was selected. Finally, bi-layered tablets were prepared by double compression of selected sustained release layer and immediate release layer of Divalproex sodium. The tablets were evaluated for hardness, thickness, weight variation, friability, drug content uniformity and in vitro drug release. All the physical parameters were in acceptable limit of pharmacopeial specification. The stability studies, shown the bi-layer tablet was stable at 40oC / 75% RH for a period of 3 months.  

scholarly journals FORMULATION AND EVALUATION OF LIQUISOLID COMPACTS OF LORNOXICAM

2019 ◽  
pp. 33-37
Author(s):  
Asma Azaruddin Mokashi ◽  
SNEHALATA L. GAIKWAD
Keyword(s):  
Dissolution Rate ◽  
Drug Concentration ◽  
In Vitro Release ◽  
Water Soluble ◽  
In Vitro Dissolution ◽  
Scanning Calorimetry ◽  
Spectra Analysis ◽  
X Ray ◽  
Liquisolid Compacts

Objective: Objective of the present investigation was to enhance the solubility and dissolution rate of poorly water-soluble drug lornoxicam using liquisolid technique with comparative determination of in vitro release profile of liquisolid compacts and conventional formulation of lornoxicam. Methods: Formulation was prepared by a liquisolid technique using different drug concentration in a liquid vehicle and different carrier/coating ratio. Prepared liquisolid compact was evaluated for Fourier transform infrared (FTIR) spectra analysis, differential scanning calorimetry (DSC), X-ray diffraction (P-XRD), scanning electron microscopy (SEM) and in vitro dissolution study. Results: The result showed that liquisolid compacts of lornoxicam displayed significantly higher drug release rate as compared to pure drug and conventional tablet prepared. The results of both DSC and X-ray crystallography indicated loss of crystallinity of the drug upon formulated into the liquisolid compact. Conclusion: Dissolution rate of the drug from liquisolid compacts was affected by changing the drug concentration and excipient ratio. The liquisolid technique appeared to be a promising approach for improving the dissolution of poorly soluble drug lornoxicam.

scholarly journals ENHANCEMENT OF THE DISSOLUTION RATE OF NATEGLINIDE TABLETS USING LIQUISOLID COMPACT TECHNIQUE

2017 ◽  
Vol 10 (10) ◽  
pp. 241
Author(s):  
Tirunagari Mamatha ◽  
Nazia Sultana
Keyword(s):  
Propylene Glycol ◽  
In Vitro Release ◽  
Tween 80 ◽  
Water Soluble ◽  
Angle Of Repose ◽  
Oral Drug ◽  
Polyethylene Glycol 400 ◽  
Weight Variation ◽  
Liquisolid Compacts

  Objective: The main objective of this work is to develop new formulation to enhance the solubility of a highly permeable and a poorly soluble oral drug antihyperglycemic agent, nateglinide by liquisolid compacts.Methods: The liquisolid compact technique is based on dissolving the insoluble drug in propylene glycol, polyethylene glycol 400, tween-80 as non-volatile solvents in which drug is having high solubility and admixture of drug loaded solution with microcrystalline cellulose as carrier, aerosil as coating material, crospovidone as disintegrant, and magnesium stearate as lubricant to convert into acceptably flowing and compressible powder. The prepared liquisolid compacts were evaluated for their flowing properties such as bulk density, tapped density, angle of repose, Hausner’s ratio, and Carr’s index. Further tablets were evaluated for hardness, thickness, weight variation, friability, disintegration test, and in vitro release study.Result: Higher drug release profiles due to increased wetting property and surface area of the drug available for dissolution was obtained in case of liquisolid compacts. Among all formulations, liquisolid system prepared by propylene glycol was considered as best formulation which release drug up to 98% in 60 minutes and in comparison to marketed formulation, optimized formulation showed better dissolution profile.Conclusion: It can be concluded that liquisolid compact technique could be a promising strategy in improving the dissolution of poor water soluble drugs.

Formulation and Evaluation of Extended Release Trihexyphenidyl Hydrochloride Hard Gelatin Capsules

2011 ◽  
Vol 4 (1) ◽  
pp. 1359-1367
Author(s):  
Madhusudan Rao Y ◽  
Vinay Kumar K ◽  
Jagan Mohan S ◽  
Kiran Kumar V
Keyword(s):  
Drug Release ◽  
Extended Release ◽  
In Vitro Release ◽  
Content Uniformity ◽  
Drug Release Profile ◽  
Coupled Diffusion ◽  
Weight Variation ◽  
Release Studies ◽  
Release Profiles

This work aims at investigating different types and levels of hydrophilic high molecular weight matrix agents, (including HPMC K15M, Metalose-60 SH, Metalose-65 SH and Metalose-90SH-SR), hydrophobic diluent (Talc) and formulation methods (Non-aqueous granulation and direct filling by simple mere mixture) in an attempt to formulate hard gelatin extended release matrix capsules containing Trihexyphenidyl HCl (Benzhexol). The drug release from all the extended release matrix capsules show polymer as well as talc concentration dependent retardation affect. The Metalose 90SH-SR concentration was optimized to approximately 27% w/w of total capsule net content weight. The hydrophobic diluent’s talc concentration was optimized and the useful concentration was approximately 17.45% w/w of the total net capsule content weight. The lactose concentration was also optimized and the effective concentration was found to be approximately 48.36% w/w. The prepared hard gelatin extended release capsules were evaluated for weight variation, Average net content, locked length, content uniformity, assay (drug content) and in-vitro drug release studies. From the in-vitro release studies of the prepared formulations, one formula was optimized from each method. All the formulations showed linear release profiles and extended the release of trihexyphenidyl HCl (Benzhexol) over 10 –12 h. The release profiles of extended release matrix capsules of trihexyphenidyl HCl (THP HCl) from the selected formulations were close to zero order and follow diffusion dependent release. The prepared extended release matrix capsules of trihexyphenidyl HCl (Benzhexol) produced from the optimized formulations ‘NAG-M90SH-SR-5 and DB M90SH-SR-4’ complied with the USP XXVII specifications. The difference factor (f1) and similarity factor (f2) was calculated for all these formulations and found to the below 15 and above 50. Irrespective of the formulation method type and its procedure, the prepared hydrophilic extended release matrix capsules showed non-Fickian anomalous transport (coupled diffusion in the hydrated matrix and polymer relaxation) as the values of release exponent (n) are in between 0.50 and 0.89. Finally it was clear that it is possible to design a formulation with any of the above two methods giving the desired drug release profile suggesting that nonaqueous granulation, Direct filling were good methods for preparing extended release matrix capsules of trihexyphenidyl HCl (Benzhexol).

DESIGN AND CHARACTERIZATION OF ACECLOFENAC FAST DISSOLVING TABLETS USING SUPER DISINTEGRATING AGENTS

INDIAN DRUGS ◽  
2014 ◽  
Vol 51 (01) ◽  
pp. 34-40
Author(s):  
V.L Narasaiah ◽  
◽  
Ch. Praneetha ◽  
P Mallika ◽  
K. Pullamma ◽  
...  
Keyword(s):  
Drug Release ◽  
In Vitro Release ◽  
In Vitro Dissolution ◽  
Wet Granulation ◽  
Content Uniformity ◽  
Disintegration Time ◽  
First Order ◽  
Drug Content ◽  
Weight Variation

The aim of this project was to develop fast dissolving tablets (FDT) of aceclofenac by wet granulation using super disintegrating agents such as cross carmellose sodium (CCS), Crospovidone (CP) and sodium starch glycolate (SSG) were formulated and evaluated. The tablets evaluated for thickness, hardness, friability weight variation, drug content, water absorption ratio, wetting time, disintegration time and in vitro dissolution studies. The in vitro release studies were conducted in pH 7.4 phosphate buffer. Different release models like zero order, first order, Higuchi and Korsmeyer-Peppas were applied to in vitro drug release data in order to evaluate drug release mechanisms and kinetics. The formulation ‘F4’ showed satisfactory physico-chemical properties and drug content uniformity. The formulation ‘F4’ follows first order kinetics and the mechanism of drug release was governed by Higuchi. The ‘n’ value showed between <0.5, it was followed that Fickian transport. The FTIR studies were conducted and it shows that there is no interaction between drug and excipients.

scholarly journals FORMULATION AND EVALUATION OF METOCLOPRAMIDE HCL RECTAL SUPPOSITORIES

2019 ◽  
Author(s):  
Deborah Ejiogu Chioma ◽  
Felix Sunday Yusuf
Keyword(s):  
Drug Release ◽  
Release Kinetics ◽  
Diffusion Mechanism ◽  
In Vitro Release ◽  
Content Uniformity ◽  
Disintegration Time ◽  
Weight Variation ◽  
Rectal Suppositories ◽  
Vitro Release

Metoclopramide hydrochloride is a dopamine receptor antagonist, used mostly for stomach and esophageal problems as it is a prokinetic agent. The aim of the present study was to design and evaluate the suppositories of Metoclopramide HCl.  Six different, rectal suppositories were developed by fusion (pour-moulding) method by employing various hydrophilic and hydrophobic polymeric bases like gelatin, PEG-400 and hydrogenated vegetable oil using propylene glycol as plasticizer and beeswax as hardening agent.  Metoclopramide HCl suppositories were evaluated for appearance, weight variation, drug content uniformity, liquefaction time and temperature, micro-melting range, disintegration and in-vitro release study.  The in-vitro release rate data was evaluated statistically and was found that from all the formulations the drug release is by diffusion mechanism. Optimum formulation of batch S1 has shown 83.427% Metoclopramide HCl in a study of 2 hrs. These drug release results are supported by the disintegration time of suppositories. Lesser the disintegration time faster the drug release. All formulations has shown zero, first and Higuchi release kinetics. The result suggests that the Metoclopramide HCl suppositories can be prepared by employing hydrophilic and hydrophobic polymers.

scholarly journals FORMULATION AND EVALUATION OF DUAL-LAYERED OSMOTIC PUMP CONTROLLED-RELEASE TABLETS OF CEFIXIME

2021 ◽  
Vol 12 (6) ◽  
pp. 7-19
Author(s):  
Rahul Tyagi ◽  
Pankaj Kumar Sharma ◽  
Dilip Kumar Gupta
Keyword(s):  
Controlled Release ◽  
Drug Release ◽  
In Vitro Release ◽  
Zero Order ◽  
Release Kinetic ◽  
Content Uniformity ◽  
Release Formulation ◽  
Weight Variation ◽  
Core Tablet

Background: This study aims to formulate, optimize and evaluate the osmotic tablet of cefixime. It improves the site specification and provides the controlled release of drug once – a – day through this drug delivery system. Cefixime assumes a significant part in dissolvability restricts other than dissolvable sort. It might increase the bioavailability of drugs by the preparation of the osmotic tablet. Method: The forming core tablet does a formulation of Controlled Porosity Osmotic Tablets (CP1 – CP9) using an ingredient like sodium chloride, PVP K30, Microcrystalline cellulose various ratios. The coating of the core tablet is done by Cellulose Acetate, PEG 400, with statistical ratios. Result: On depending upon the various evaluation parameters like hardness, diameter, friability, weight variation, content uniformity, In vitro release, CP9 formulation gave better consequence. The percentage of drug release is >95%. The optimized CP9 batch showed a maximum correlation of 0.992 with a zero-order drug release kinetic model. Conclusion: A controlled release formulation of cefixime based on osmotic technology, were developed. The release from the developed formulation was independent of pH and agitational intensity of the release media; the formulation fitted well into zero-order kinetics, indicating the release to be drug load independent. Drug release was directly proportional to the initial pore level but inversely related to the membrane weight. The release was inversely associated with the release media's osmotic pressure, confirming osmotic pumping as the central mechanism of release.

Fenofibrate Solid Dispersion for Improving Oral Bioavailability: Preparation, and Characterization and in vivo Evaluation

2020 ◽  
Vol 13 (5) ◽  
pp. 5102-5109
Author(s):  
Venu Madhav K ◽  
Somnath De ◽  
Chandra Shekar Bonagiri ◽  
Sridhar Babu Gummadi
Keyword(s):  
Oral Bioavailability ◽  
Oral Delivery ◽  
Solid Dispersions ◽  
In Vitro Release ◽  
Aqueous Solubility ◽  
Water Soluble ◽  
Scanning Calorimetry ◽  
In Vivo Evaluation

Fenofibrate (FN) is used in the treatment of hypercholesterolemia. It shows poor dissolution and poor oral bioavailability after oral administration due to high liphophilicity and low aqueous solubility. Hence, solid dispersions (SDs) of FN (FN-SDs) were develop that might enhance the dissolution and subsequently oral bioavailability. FN-SDs were prepared by solvent casting method using different carriers (PEG 4000, PEG 6000, β cyclodextrin and HP β cyclodextrin) in different proportions (0.25%, 0.5%, 0.75% and 1% w/v). FN-SDs were evaluated solubility, assay and in vitro release studies for the optimization of SD formulation. Differential scanning calorimetry (DSC), powder X-ray diffraction (PXRD) and scanning electron microscopy (SEM) analysis was performed for crystalline and morphology analysis, respectively. Further, optimized FN-SD formulation evaluated for pharmacokinetic performance in Wistar rats, in vivo in comparison with FN suspension.  From the results, FN-SD3 and FN-SD6 have showed 102.9 ±1.3% and 105.5±3.1% drug release, respectively in 2 h. DSC and PXRD studies revealed that conversion of crystalline to amorphous nature of FN from FT-SD formulation. SEM studies revealed the change in the orientation of FN when incorporated in SDs. The oral bioavailability FN-SD3 and FN-SD6 formulations exhibited 2.5-folds and 3.1-folds improvement when compared to FN suspension as control. Overall, SD of FN could be considered as an alternative dosage form for the enhancement of oral delivery of poorly water-soluble FN.

Formulation and Evaluation of Orally Disintegrating Tablets of Lamotrigine

2015 ◽  
Vol 8 (2) ◽  
pp. 2881-2888
Author(s):  
Sudarshan Singh ◽  
S S Shyale ◽  
P Karade
Keyword(s):  
Drug Release ◽  
Water Soluble ◽  
In Vitro Dissolution ◽  
Disintegration Time ◽  
Orally Disintegrating Tablet ◽  
Drug Content ◽  
Weight Variation ◽  
Wetting Time ◽  
Croscarmellose Sodium

The aim of this study was to design orally disintegrating tablet (ODT) of Lamotrigine. It is an Antiepileptic drug which is widely used in epilepsy. It is also used in simple and complex partial seizures and secondary generalized tonic-clonic seizures. It is poorly water soluble drug (0.46 mg/ml). Thus, an attempt was made to enhance the water solubility by complexation with β-cyclodextrin (1:1 molar ratios). The orally disintegrating tablet of lamotrigine was prepared by direct compression method using different concentration of superdisintegrants such as Sodium starch glycollate, croscarmellose sodium by sublimating agent such as camphor. The formulations were evaluated for weight variation, hardness, friability, drug content, wetting time, in vitro disintegration time and in vitro dissolution studies. The prepared tablets were characterized by Fourier transform infrared spectroscopy and differential scanning calorimetry. The disintegration time for the complexed tablets prepared by different concentration of superdisintegrants was found to be in range of 32.54 ± 0.50 to 55.12 ± 0.57 sec and wetting time of the formulations was found to be in range of 28.47 ± 0.67 to 52.19 ± 0.72 sec. All the formulation showed almost 100 percent of drug release within 15 min. Among all the formulation F6 and F7 prepared with 18% croscarmellose sodium and camphor shows faster drug release, respectively 10 min, F6 gives good result for disintegration time, drug release, wetting time and friability. Further formulations were subjected to stability testing for 30 days at temperature of 40 ± 5 ºC/75 ± 5 %RH. Tablets showed no appreciable changes with respect to physical appearance, drug content, disintegration time and dissolution profiles. Results were statistically analyzed by one-way ANOVA at a p < 0.05. It was found that, the data at any point of time are significant at p < 0.05.

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