DESIGN AND OPTIMIZATION OF ORAL BIOADHESIVE NANOCURCUMIN DELIVERY USING NOVEL HYDROPHILIC CARRIER FOR CANCER TREATMENT: AN ALTERNATIVE TO PARENTERAL CHEMOTHERAPY

INDIAN DRUGS ◽  
2016 ◽  
Vol 53 (08) ◽  
pp. 24-36
Author(s):  
P. N Kendre ◽  
◽  
P. D. Chaudhari
Keyword(s):  
Solid Dispersion ◽  
Tablet Formulation ◽  
Fickian Diffusion ◽  
Release Mechanism ◽  
Design And Optimization ◽  
Drug Release Mechanism ◽  
Zero Order Kinetics ◽  
Time Period ◽  
Two Factors ◽  
Central Composite Designs

Present study involves the design and optimization of oral bioadhesive delivery system of curcumin. Solid dispersion of curcumin was developed using novel hydrophilic carrier, Gelucire® 50/13, by melt granulation technique. Based on HPMC K 100 LV(X1) and carbopol 934P (X2), bio-adhesive tablets containing curcumin solid dispersion was developed by direct compression, using central composite designs for two factors at three levels. Tablet formulation was optimized for t50%, Rel24h and bioadhesive strength. The drug release mechanism was found to be by fickian diffusion, approaching zero-order kinetics. Average plasma uptake of curcumin was found to be 0.289μg/mL as compared to plain curcumin tablet formulation. The results were found highly significant (p<0.05). The swelling matrices behavior over the time period studied showed that the gelling layer thickness increases continuously. From this study, it may be concluded that the oral controlled bioadhesive curcumin delivery may be an alternative to parenteral chemotherapy.

Synthesis and Evaluation of Starch – Urea – Borate as Rate Controlling Matrix for Controlled Release

1970 ◽  
Vol 1 (2) ◽  
pp. 167-170
Author(s):  
Chowdary KPR ◽  
Murali Krishna MN
Keyword(s):  
Controlled Release ◽  
Release Rate ◽  
Guar Gum ◽  
Matrix Tablets ◽  
Fickian Diffusion ◽  
Release Mechanism ◽  
Drug Release Mechanism ◽  
Zero Order Kinetics ◽  
Diffusion Controlled ◽  
Controlled Release Tablets

The objective of the present investigation is to synthesize starch – urea – borate, a new starch based polymer and to evaluate its application in the design of controlled release matrix tablets of diclofenac and gliclazide. The release rate controlling efficiency of starch – urea – borate was also compared with that of known polymers. Starch – urea – borate (SUB) polymer was synthesized by gelatinization of starch in the presence of urea and borax. Matrix tablets of diclofenac (100 mg) and gliclazide (60 mg) were formulated employing starch – urea – borate polymer in different proportions of drug and polymer and the tablets were evaluated. With both diclofenac and gliclazide, release from the formulated matrix tablets was slow and spread over 24 h and depended on percent polymer in the tablet. Release was diffusion controlled and followed zero order kinetics. Non – fickian diffusion was the drug release mechanism from the formulated tablets. Diclofenac release from matrix tablets formulated employing 33 % SUB (DF3) and Gliclazide release from matrix tablets formulated employing 50 % SUB (GF4) was similar to that from the corresponding commercial SR tablets. Starch – urea – borate polymer was found suitable for the design of oral controlled release tablets of diclofenac and gliclazide. The order of increasing release rate controlling efficiency with various polymers was ethyl cellulose = guar gum > SUB > sodium CMC > HPMC. Starch – urea – borate is a better release rate controlling polymer than HPMC and sodium CMC for obtaining controlled release over    24 hours.

DESIGN AND CHARACTERIZATION OF ALFUZOSIN HCL GASTRORETENTIVE FLOATING MATRIX TABLETS EMPLOYING HPMC K 100M

INDIAN DRUGS ◽  
2018 ◽  
Vol 55 (11) ◽  
pp. 71-73
Author(s):  
Ch. Taraka Ramarao ◽  
◽  
J Vijaya Ratna ◽  
R. B. Srinivasa
Keyword(s):  
Drug Release ◽  
Dosage Forms ◽  
Matrix Tablets ◽  
Fickian Diffusion ◽  
Release Mechanism ◽  
Gastric Residence Time ◽  
Drug Release Mechanism ◽  
The Matrix ◽  
Gastro Retentive

The present investigation involves developing gastro retentive drug delivery systems (GFDDS) of alfuzosin HCl using HPMCK100M a is the matrixing agent and floating enhancer. Sodium bicarbonate in the acidic environment reacts with the acid and produces carbon dioxide. The gastro retentive tablets can be formulated to increase the gastric residence time and thereby increase the oral bioavailability. From the drug release study, it was concluded that the AFTB4 formula of HPMC K 100 M matrix tablets gives the controlled release up to 12 hours by showing increased release with floating lag time 24 seconds. Non – Fickian diffusion was the drug release mechanism from the matrix tablets formulated employing HPMC K 100 M. The matrix tablets (AFTB4) formulated employing 40 % HPMC K 100 M are best suited to be used for gastro retentive dosage form of alfuzosin HCl. Finally, it can be concluded that good candidates for the preparation of gastro retentive dosage forms due its gastric stability, gastric absorption and better bioavailability.

scholarly journals 5-Fluorouracil Release from Chitosan-Based Matrix.Experimental and Theoretical Aspects

2020 ◽  
Vol 57 (3) ◽  
pp. 180-188
Author(s):  
Roxana Iancu ◽  
Stefan Andrei Irimiciuc ◽  
Maricel Agop ◽  
Mihail Frasila ◽  
Maria-Alexandra Paun ◽  
...  
Keyword(s):  
Drug Release ◽  
Polarized Light ◽  
Crosslinking Density ◽  
Fickian Diffusion ◽  
Release Mechanism ◽  
Morphological Aspects ◽  
Drug Release Mechanism ◽  
The Matrix

A series of four drug release formulations based on 5-fluorouracil encapsulated into a chitosan-based matrix were prepared by in situ hydrogelation with 3,7-dimethyl-2,6-octadienal. The formulations were investigated from structural and morphological aspects by FTIR spectroscopy, polarized light microscopy and scanning electron microscopy. It was established that 5-fluorouracil was anchored into the matrix as crystals, whose dimension varied as a function of the crosslinking density. The in vitro drug release simulated into a media mimicking the physiological environment revealed a progressive release of the 5-fluorouracil, in close interdependence with the crosslinking density. In the context of Pharmacokinetics behavioral analysis, a new mathematical procedure for describing drug release dynamics in polymer-drug complex system is proposed. Assuming that the dynamics of polymer-drug system�s structural units take place on continuous and nondifferentiable curves (multifractal curves), we show that in a one-dimensional hydrodynamic formalism of multifractal variables the drug release mechanism (Fickian diffusion, non-Fickian diffusion, etc) are given through synchronous dynamics at a differentiable and non-differentiable scale resolutions. Finally, the model is confirmed by the empirical data.

scholarly journals Formulation and Evaluation of Gliclazide Solid Dispersions Incorporated Tablets for Controlled Drug Release

2020 ◽  
pp. 621-629
Author(s):  
Ramisetty Sunitha ◽  
Kothakota Venugopal ◽  
Suggala Venkata Satyanarayana
Keyword(s):  
Controlled Release ◽  
Drug Release ◽  
Solid Dispersion ◽  
Release Kinetics ◽  
Maximum Yield ◽  
Amorphous State ◽  
Tablet Formulation ◽  
Drug Dissolution ◽  
Fickian Diffusion ◽  
Drug Content

The current study deals with formulation and evaluation of gliclazide solid dispersion with HP β Cyclodextrin to enhance solubility and incorporate into tablet formulation for controlled release of gliclazide. Gliclazide solid dispersion (SD) prepared using varying ratios of HP β Cyclodextrin and evaluated. The optimized SD formulation incorporated into tablet by using hydroxypropyl cellulose, HPMC K 100M. The drug dissolution from tablet formulation analyzed and characterize. The formulation SD3 comprising of drug and polymer in 1:3 ratio displayed 43-fold increase in solubility when compared to pure drug. The formulation SD13 displayed maximum yield of 98.96% and maximum drug content of 99% chosen optimal for tablet formulation. FTIR studies revealed that there is no incompatibility between drug and polymers found. XRD studies revealed that the optimized solid dispersion formulation was found to be in amorphous state. Around 15 formulations of controlled release tablet blends evaluated for micrometric properties show that all the formulations posses’ good flow properties. Formulation F15 with maximum drug content of 99.99% and drug release of 99.96 % over 16h was chosen optimal and characterized. The release kinetics suggest that drug release followed zero order and release from tablets was anomalous non- fickian diffusion super case II transport. The results show that combination of solid dispersion and application of hydrophilic and hydrophobic polymers in matrix formation can facilitate better dissolution and absorption profile with greater patient compliance.

scholarly journals Formulation and invitro evaluation of oral extended release microspheres of aceclofenac using various natural polymers

2019 ◽  
Vol 1 (2) ◽  
pp. 58-66
Author(s):  
Syed abid ali ◽  
Syed mujtaba pasha ◽  
Omair sohail ahmed ◽  
Omer wasiq ◽  
Mohammed mukaram ◽  
...  
Keyword(s):  
Drug Release ◽  
Sodium Alginate ◽  
Oral Route ◽  
Aqueous System ◽  
Fickian Diffusion ◽  
Release Mechanism ◽  
Natural Polymers ◽  
Drug Release Mechanism ◽  
Microsphere Method

In the present work, bioadhesive microspheres of Aceclofenac using Sodium alginate along with Carbopol 934, Carbopol 971, HPMC K4M as copolymers were formulated to deliver Aceclofenac via oral route. The results of this investigation indicate that ionic cross-linking technique Ionotropic gelation method can be successfully employed to fabricate Aceclofenac microspheres. The technique provides characteristic advantage over conventional microsphere method, which involves an “all-aqueous” system, avoids residual solvents in microspheres. FT-IR spectra of the physical mixture revealed that the drug is compatible with the polymers and copolymers used. Micromeritic studies revealed that the mean particle size of the prepared microspheres was in the size range of 512-903µm and are suitable for bioadhesive microspheres for oral administration. The in-vitro mucoadhesive study demonstrated that microspheres of Aceclofenac using sodium alginate along with Carbopol934 as copolymer adhered to the mucus to a greater extent than the microspheres of Aceclofenac using sodium alginate along with Carbopol 971 and HPMC K4M as copolymers. The invitro drug release decreased with increase in the polymer and copolymer concentration. Analysis of drug release mechanism showed that the drug release from the formulations followed non-Fickian diffusion and the best fit model was found to be Korsmeyer-Peppas. Based on the results of evaluation tests formulation coded T4 was concluded as best formulation.

scholarly journals Doxycycline and Monocaprin In Situ Hydrogel: Effect on Stability, Mucoadhesion and Texture Analysis and In Vitro Release

Gels ◽  
2019 ◽  
Vol 5 (4) ◽  
pp. 47 ◽  
Author(s):  
Venu Gopal Reddy Patlolla ◽  
William Peter Holbrook ◽  
Sveinbjorn Gizurarson ◽  
Thordis Kristmundsdottir
Keyword(s):  
Drug Release ◽  
In Vitro Release ◽  
Fickian Diffusion ◽  
Release Time ◽  
Release Mechanism ◽  
Oral Diseases ◽  
Zero Order Kinetics ◽  
In Situ Hydrogel

The aim of this study was to develop a stable aqueous formulation containing a combination of doxycycline and monocaprin in clinically relevant concentrations. Increase in expression of Matrix metalloproteinases (MMPs) and microbial role in oral diseases is well established and the combination of above active ingredients could be potentially beneficial in treatment of oral mucosal conditions. The hydrogels containing different concentrations of doxycycline and monocaprin in the presence and absence of stabilizing excipients were developed and their stabilities were studied at 4 °C for up to 1 year. The drug–drug interaction was evaluated using Fourier-transform infrared spectroscopy (FTIR). The addition of monocaprin on doxycycline in situ hydrogel’s mucoadhesiveness, texture properties and drug release mechanism was studied. The addition of monocaprin negatively affected the doxycycline stability and was concentration dependent, whereas monocaprin was stable up to 1 year. Doxycycline did not interfere with the anti-Candidal activity of monocaprin. Furthermore, the presence of monocaprin significantly affected the formulation hardness, compressibility and adhesiveness. Monocaprin and doxycycline release followed zero order kinetics and the release mechanism was, by anomalous (non-Fickian) diffusion. The addition of monocaprin increased the drug release time and altered the release mechanism. It is possible to stabilize doxycycline in the presence of monocaprin up to 1 year at 4 °C.

Formulation Design and Optimization of Repaglinide Solid Dispersions by Central Composite Design

2018 ◽  
Vol 11 (6) ◽  
pp. 4337-4348
Author(s):  
Bhikshapathi D. V. R. N. ◽  
Srinivas I
Keyword(s):  
Central Composite Design ◽  
Dissolution Rate ◽  
Solid Dispersion ◽  
Solid Dispersions ◽  
Solvent Evaporation ◽  
Release Mechanism ◽  
Solvent Evaporation Method ◽  
Onset Of Action ◽  
Evaporation Method ◽  
Central Composite

Repaglinide is a pharmaceutical drug used for the treatment of type II diabetes mellitus, it is characterized with poor solubility which limits its absorption and dissolution rate and delays onset of action. In the present study, immediate release solid dispersion of repaglinide was formulated by solvent evaporation technique. Repaglinide solid dispersions were prepared using PEG 8000, Pluronic F 127 and Gelucire 44/14 by solvent evaporation method. A 3-factor, 3-level central composite design employed to study the effect of each independent variable on dependent variables. FTIR studies revealed that no drug excipient interaction takes place. From powder X-ray diffraction (p-XRD) and by scanning electron microscopy (SEM) studies it was evident that polymorphic form of repaglinide has been converted into an amorphous form from crystalline within the solid dispersion formulation. The correlation coefficient showed that the release profile followed Higuchi model anomalous behavior and hence release mechanism was indicative of diffusion. The obtained results suggested that developed solid dispersion by solvent evaporation method might be an efficacious approach for enhancing the solubility and dissolution rate of repaglinide.

3 (2) Factorial Design Assisted Crushed Puffed Rice-HPMC-Chitosan based Hydrodynamically Balanced System of Metoprolol Succinate

2020 ◽  
Vol 10 (3) ◽  
pp. 237-249
Author(s):  
Shashank Soni ◽  
Veerma Ram ◽  
Anurag Verma
Keyword(s):  
Drug Release ◽  
Factorial Design ◽  
Hydroxypropyl Methylcellulose ◽  
Batch Size ◽  
Metoprolol Succinate ◽  
Zero Order Kinetics ◽  
Two Factors ◽  
Puffed Rice ◽  
Model Drug

Introduction: Hydrodynamically balanced system (HBS) possesses prolonged and continuous delivery of the drug to the gastrointestinal tract which improves the rate and extent of medications that have a narrow absorption window. The objective of this work was to develop a Hydrodynamically Balanced System (HBS) of Metoprolol Succinate (MS) as a model drug for sustained stomach specific delivery. Materials and Methods: Experimental batches were designed according to 3(2) Taguchi factorial design. A total of 9 batches were prepared for batch size 100 capsules each. Formulations were prepared by physically blending MS with polymers followed by encapsulation into hard gelatin capsule shell of size 0. Polymers used were Low Molecular Weight Chitosan (LMWCH), Crushed Puffed Rice (CPR), and Hydroxypropyl Methylcellulose K15 M (HPMC K15M). Two factors used were buoyancy time (Y1) and time taken for 60% drug release (T60%; Y2). Results: The drug excipient interaction studies were performed by the thermal analysis method which depicts that no drug excipient interaction occurs. In vitro buoyancy studies and drug release studies revealed the efficacy of HBS to remain gastro retentive for a prolonged period and concurrently sustained the release of MS in highly acidic medium. All formulations followed zero-order kinetics. Conclusion: Developed HBS of MS with hydrogel-forming polymers could be an ideal delivery system for sustained stomach specific delivery and would be useful for the cardiac patients where the prolonged therapeutic action is required.

scholarly journals Development of Controlled-Release Carbamide Peroxide Loaded Nanoemulgel for Tooth Bleaching: In Vitro and Ex Vivo Studies

2021 ◽  
Vol 14 (2) ◽  
pp. 132
Author(s):  
Siriporn Okonogi ◽  
Adchareeya Kaewpinta ◽  
Sakornrat Khongkhunthian ◽  
Pisaisit Chaijareenont
Keyword(s):  
Drug Release ◽  
Solid Dispersion ◽  
Solid Dispersions ◽  
Tooth Bleaching ◽  
Polymer Mixture ◽  
Release Mechanism ◽  
Burst Release ◽  
Order Kinetic ◽  
Carbamide Peroxide ◽  
Periodontal Tissues

Burst release of carbamide peroxide (CP) from traditional hydrogels causes severe inflammation to periodontal tissues. The present study explores the development of a novel CP nanoemulgel (CP-NG), an oil-in-water nanoemulsion-based gel in which CP was loaded with a view to controlling CP release. CP solid dispersions were prepared, using white soft paraffin or polyvinylpyrrolidone-white soft paraffin mixture as a carrier, prior to formulating nanoemulsions. It was found that carrier type and the ratio of CP to carrier affected drug crystallinity. Nanoemulsions formulated from the optimized CP solid dispersions were used to prepare CP-NG. It was found that the ratio of drug to carrier in CP solid dispersions affected the particle size and zeta potential of the nanoemulsions as well as drug release behavior and tooth bleaching efficacy of CP-NG. Drug release from CP-NG followed a first-order kinetic reaction and the release mechanism was an anomalous transport. Drug release rate decreased with an increase in solid dispersion carriers. CP-NG obtained from the solid dispersion with a 1:1 ratio of CP to the polymer mixture is suitable for sustaining drug release with high tooth bleaching efficacy and without reduction of enamel microhardness. The developed CP-NG is a promising potential tooth bleaching formulation.

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