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Preparation of Polyacrylate Hollow Microspheres via Facile Spray Drying. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9020228] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Polyacrylate microspheres with a hollow structure were prepared by a facile spray drying method. The effects of spray drying process parameters, including inlet temperature, atomizer rotational speed, and feed speed, on the particle size, bulk density, and morphology of the resultant polyacrylate hollow microspheres were investigated and discussed. The mechanism for the formation of the polyacrylate hollow microspheres was proposed. This facile and scalable method for preparing hollow polymer microspheres is expected to be valuable to prepare various polymer hollow structures for widespread application.
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Rahamathulla M, Saisivam S, Gangadharappa HV. Development of Valsartan Floating Matrix Tablets Using Low Density Polypropylene Foam Powder: In vitro and In vivo Evaluation. AAPS PharmSciTech 2019; 20:35. [PMID: 30604045 DOI: 10.1208/s12249-018-1265-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Accepted: 11/26/2018] [Indexed: 11/30/2022] Open
Abstract
The main purpose of the study was to develop valsartan floating tablets (VFT) via non-effervescent technique using low density polypropylene foam powder, carbopol, and xanthan gum by direct compression. Before compression, the particulate powdered mixture was evaluated for pre-compression parameters. The prepared valsartan tablets were evaluated for post-compression parameters, swelling index, floating lag time, in vitro buoyancy studies, and in vitro and in vivo X-ray imaging studies in albino rabbits. The result of all formulations for pre- and post-compression parameters were within the limits of USP. FTIR and DSC studies revealed no interaction between the drug and polymers used. The prepared floating tablets had good swelling and floating capabilities for more than 12 h with zero floating lag time. The release of valsartan from optimized formulation NF-2 showed sustained release up to 12 h; which was found to be non-Fickian release. Moreover, the X-ray imaging of optimized formulation (NF-2) revealed that tablet was constantly floating in the stomach region of the rabbit, thereby indicating improved gastric retention time for more than 12 h. Consequently, all the findings and outcomes have showed that developed valsartan matrix tablets could be effectively used for floating drug delivery system.
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Desbrieres J, Peptu C, Ochiuz L, Savin C, Popa M, Vasiliu S. Application of Chitosan-Based Formulations in Controlled Drug Delivery. SUSTAINABLE AGRICULTURE REVIEWS 36 2019. [DOI: 10.1007/978-3-030-16581-9_7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Srivastava SK, Clergeaud G, Andresen TL, Boisen A. Micromotors for drug delivery in vivo: The road ahead. Adv Drug Deliv Rev 2019; 138:41-55. [PMID: 30236447 DOI: 10.1016/j.addr.2018.09.005] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 08/27/2018] [Accepted: 09/11/2018] [Indexed: 01/16/2023]
Abstract
Autonomously propelled/externally guided micromotors overcome current drug delivery challenges by providing (a) higher drug loading capacity, (b) localized delivery (less toxicity), (c) enhanced tissue penetration and (d) active maneuvering in vivo. These microscale drug delivery systems can exploit biological fluids, as well as exogenous stimuli, like light-NIR, ultrasound and magnetic fields (or a combination of these), towards propulsion/drug release. Ability of these wireless drug carriers towards localized targeting and controlled drug release, makes them a lucrative candidate for drug administration in complex microenvironments (like solid tumors or gastrointestinal tract). In this report, we discuss these microscale drug delivery systems for their therapeutic benefits under in vivo setting and provide a design-application rationale towards greater clinical significance. Also, a proof-of-concept depicting 'microbots-in-a-capsule' towards oral drug delivery has been discussed.
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Affiliation(s)
- Sarvesh Kumar Srivastava
- Center for Intelligent Drug Delivery and Sensing Using microcontainers and Nanomechanics (IDUN), Department of Micro- and Nanotechnology, Technical University of Denmark, Denmark.
| | - Gael Clergeaud
- Center for Nanomedicine and Theranostics, Department of Micro- and Nanotechnology, Technical University of Denmark, Denmark.
| | - Thomas L Andresen
- Center for Nanomedicine and Theranostics, Department of Micro- and Nanotechnology, Technical University of Denmark, Denmark
| | - Anja Boisen
- Center for Intelligent Drug Delivery and Sensing Using microcontainers and Nanomechanics (IDUN), Department of Micro- and Nanotechnology, Technical University of Denmark, Denmark
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Gooneh-Farahani S, Naimi-Jamal MR, Naghib SM. Stimuli-responsive graphene-incorporated multifunctional chitosan for drug delivery applications: a review. Expert Opin Drug Deliv 2018; 16:79-99. [PMID: 30514124 DOI: 10.1080/17425247.2019.1556257] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
INTRODUCTION Recently, the use of chitosan (CS) in the drug delivery has reached an acceptable maturity. Graphene-based drug delivery is also increasing rapidly due to its unique physical, mechanical, chemical, and electrical properties. Therefore, the combination of CS and graphene can provide a promising carrier for the loading and controlled release of therapeutic agents. AREAS COVERED In this review, we will outline the advantages of this new drug delivery system (DDS) in association with CS and graphene alone and will list the various forms of these carriers, which have been studied in recent years as DDSs. Finally, we will discuss the application of this hybrid composite in other fields. EXPERT OPINION The introducing the GO amends the mechanical characteristics of CS, which is a major problem in the use of CS-based carriers in drug delivery due to burst release in a CS-based controlled release system through the poor mechanical strength of CS. Many related research on this area are still not fully unstated and occasionally they seem inconsistent in spite of the intent to be complementary. Therefore, a sensitive review may be needed to understand the role of graphene in CS/graphene carriers for future drug delivery applications.
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Affiliation(s)
- Sahar Gooneh-Farahani
- a Research Laboratory of Green Organic Synthesis and Polymers, Chemistry Department , Iran University of Science and Technology (IUST) , Tehran , Iran
| | - M Reza Naimi-Jamal
- a Research Laboratory of Green Organic Synthesis and Polymers, Chemistry Department , Iran University of Science and Technology (IUST) , Tehran , Iran
| | - Seyed Morteza Naghib
- b Nanotechnology Department, School of New Technologies , Iran University of Science and Technology (IUST) , Tehran , Iran
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Shahba AAW, Alanazi FK, Abdel-Rahman SI. Stabilization benefits of single and multi-layer self-nanoemulsifying pellets: A poorly-water soluble model drug with hydrolytic susceptibility. PLoS One 2018; 13:e0198469. [PMID: 30024877 PMCID: PMC6053139 DOI: 10.1371/journal.pone.0198469] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Accepted: 05/18/2018] [Indexed: 11/19/2022] Open
Abstract
Solidified self-nanoemulsifying drug delivery systems (SNEDDS) offer strong option to enhance both drug aqueous solubility and stability. The current study was designed to evaluate the potential stabilization benefits of solidifying cinnarizine (CN) liquid SNEDDS into single and multi-layer self-nanoemulsifying pellets (SL-SNEP and ML-SNEP, respectively). The selected formulations were enrolled into accelerated, intermediate and long-term stability studies. The chemical stability was assessed based on the % of intact CN remaining in formulation. The physical stability was assessed by monitoring the in-vitro dissolution and physical appearance of the formulations. The degradation pathway of CN within lipid-based formulation was proposed to involve a hydroxylation reaction of CN molecule. The chemical stability study revealed significant CN degradation in liquid SNEDDS, SL-SNEP and ML-SNEP (lacking moisture-sealing) within all the storage conditions. In contrast, the moisture sealed ML-SNEP showed significant enhancement of CN chemical stability within the formulation. In particular, ML-SNEP coated with Kollicoat Smartseal 30D showed superior CN stabilization and no significant decrease in dissolution efficiency, at all the storage conditions. The observed stability enhancement is owing to the complete isolation between CN and SNEDDS layer as well as the effective moisture protection provided by Kollicoat Smartseal 30D. Hence, the degradation problem could be eradicated completely. The incorporation of silicon dioxide had an important role in the inhibition of pellet agglomeration upon storage. Accordingly, ML-SNEP coated with Kollicoat Smartseal 30D and/or silicon dioxide could be an excellent dosage form that combine dual enhancement of CN solubilization and stabilization.
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Affiliation(s)
- Ahmad Abdul-Wahhab Shahba
- Kayyali Chair for Pharmaceutical Industries, Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, Kingdom of Saudi Arabia
- * E-mail:
| | - Fars Kaed Alanazi
- Kayyali Chair for Pharmaceutical Industries, Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, Kingdom of Saudi Arabia
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Gupta R, Tripathi P, Bhardwaj P, Mahor A. Recent advances in gastro retentive drug delivery systems and its application on treatment of H. Pylori infections. ACTA ACUST UNITED AC 2018. [DOI: 10.15406/japlr.2018.07.00258] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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59
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Qin C, Wu M, Xu S, Wang X, Shi W, Dong Y, Yang L, He W, Han X, Yin L. Design and optimization of gastro-floating sustained-release tablet of pregabalin: In vitro and in vivo evaluation. Int J Pharm 2018; 545:37-44. [PMID: 29649518 DOI: 10.1016/j.ijpharm.2018.04.011] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 03/27/2018] [Accepted: 04/08/2018] [Indexed: 11/28/2022]
Abstract
Pregabalin is a promising drug for the treatment of neuropathic pain, a chronic disease affecting a large population needing long-term treatment. However, due to its short half-life, the commercial tablet has to be administered 2-3 times per day, with inconvenience for patient and fluctuations of plasma concentration. In this study, a gastro-floating drug delivery system of pregabalin was developed to prolong the gastric retention of drugs absorbed or act in stomach or upper gastrointestinal tract. First of all, it was proved that the drug was mainly absorbed in stomach and upper gastrointestinal tract. The final formulation was optimized in consideration of buoyancy and drug release profile. The gastro-floating tablet was prepared with hydroxypropyl methylcellulose (HPMC) as sustained-release matrix, lipophilic cetyl alcohol as floating-assistance agent and other excipients to achieve satisfying buoyancy and sustained release performance with mechanisms of diffusion and matrix erosion. Food exhibited significant effect on the pharmacokinetics of gastro-floating tablet and conventional capsule. Compared with conventional capsules, the relative bioavailability of gastro-floating tablet in fasted conditions or in fed conditions was only 62.47 ± 10.80% and 100.98 ± 17.25% respectively, even though the gastro-floating tablet obtained decreased Cmax and prolonged Tmax in fasted and fed conditions. Besides, good in vivo-in vitro correlation of the gastro-floating tablet was established. In summary, a gastro-floating tablet of pregabalin exhibiting desired buoyancy and release profiles was designed, and the tablet expressed significantly sustained-release behavior in fed conditions with good in vivo-in vitro correlation. The designed gastro-floating system is a promising choice for the patients to relieve neuropathic pain.
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Affiliation(s)
- Chao Qin
- Center for Research Development and Evolution of Pharmaceutical Excipients and Generic Drugs, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, PR China
| | - Mengmeng Wu
- Center for Research Development and Evolution of Pharmaceutical Excipients and Generic Drugs, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, PR China
| | - Siyuan Xu
- Center for Research Development and Evolution of Pharmaceutical Excipients and Generic Drugs, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, PR China
| | - Xiaowei Wang
- Center for Research Development and Evolution of Pharmaceutical Excipients and Generic Drugs, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, PR China
| | - Wenxing Shi
- Center for Research Development and Evolution of Pharmaceutical Excipients and Generic Drugs, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, PR China
| | - Yangyu Dong
- Center for Research Development and Evolution of Pharmaceutical Excipients and Generic Drugs, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, PR China
| | - Lei Yang
- Center for Research Development and Evolution of Pharmaceutical Excipients and Generic Drugs, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, PR China
| | - Wei He
- Center for Research Development and Evolution of Pharmaceutical Excipients and Generic Drugs, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, PR China
| | - Xiaopeng Han
- Center for Research Development and Evolution of Pharmaceutical Excipients and Generic Drugs, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, PR China.
| | - Lifang Yin
- Center for Research Development and Evolution of Pharmaceutical Excipients and Generic Drugs, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, PR China; State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, PR China.
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60
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Floating tablets of minocycline hydrochloride: Formulation, in-vitro evaluation and optimization. FUTURE JOURNAL OF PHARMACEUTICAL SCIENCES 2017. [DOI: 10.1016/j.fjps.2017.05.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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61
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Porwal A, Dwivedi H, Pathak K. Decades of research in drug targeting using gastroretentive drug delivery systems for antihypertensive therapy. BRAZ J PHARM SCI 2017. [DOI: 10.1590/s2175-97902017000300173] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- Amit Porwal
- Uttar Pradesh University of Medical Sciences, India
| | | | - Kamla Pathak
- Uttar Pradesh University of Medical Sciences, India
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62
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Famotidine microspheres reconstituted with floating in situ gel for stomach-specific delivery: Preparation and characterization. J Drug Deliv Sci Technol 2017. [DOI: 10.1016/j.jddst.2017.07.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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63
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El Nabarawi MA, Teaima MH, Abd El-Monem RA, El Nabarawy NA, Gaber DA. Formulation, release characteristics, and bioavailability study of gastroretentive floating matrix tablet and floating raft system of Mebeverine HCl. DRUG DESIGN DEVELOPMENT AND THERAPY 2017; 11:1081-1093. [PMID: 28435220 PMCID: PMC5388234 DOI: 10.2147/dddt.s131936] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
To prolong the residence time of dosage forms within the gastrointestinal tract until all drug is released at the desired rate is one of the real challenges for oral controlled-release drug delivery systems. This study was designed to develop a controlled-release floating matrix tablet and floating raft system of Mebeverine HCl (MbH) and evaluate different excipients for their floating behavior and in vitro controlled-release profiles. Oral pharmacokinetics of the optimum matrix tablet, raft system formula, and marketed Duspatalin® 200 mg retard as reference were studied in beagle dogs. The optimized tablet formula (FT-10) and raft system formula (FRS-11) were found to float within 34±5 sec and 15±7 sec, respectively, and both remain buoyant over a period of 12 h in simulated gastric fluid. FT-10 (Compritol/HPMC K100M 1:1) showed the slowest drug release among all prepared tablet formulations, releasing about 80.2% of MbH over 8 h. In contrast, FRS-11 (Sodium alginate 3%/HPMC K100M 1%/Precirol 2%) had the greatest retardation, providing sustained release of 82.1% within 8 h. Compared with the marketed MbH product, the Cmax of FT-10 was almost the same, while FRS-11 maximum concentration was higher. The tmax was 3.33, 2.167, and 3.0 h for marketed MbH product, FT-10, and FRS-11, respectively. In addition, the oral bioavailability experiment showed that the relative bioavailability of the MbH was 104.76 and 116.01% after oral administration of FT-10 and FRS-11, respectively, compared to marketed product. These results demonstrated that both controlled-released floating matrix tablet and raft system would be promising gastroretentive delivery systems for prolonging drug action.
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Affiliation(s)
- Mohamed A El Nabarawi
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Mahmoud H Teaima
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Rehab A Abd El-Monem
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Misr University for Science and Technology, 6th of October, Egypt
| | - Nagla A El Nabarawy
- National Egyptian Center of Environment and Toxicological Research (NECTER), Faculty of Medicine, Cairo University, Cairo, Egypt
| | - Dalia A Gaber
- Department of Quality Control, Holding Company for Biological Products and Vaccines, Cairo, Egypt
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Alginate-Based Composite Sponges as Gastroretentive Carriers for Curcumin-Loaded Self-Microemulsifying Drug Delivery Systems. Sci Pharm 2017; 85:scipharm85010011. [PMID: 28294964 PMCID: PMC5388148 DOI: 10.3390/scipharm85010011] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 03/08/2017] [Accepted: 03/08/2017] [Indexed: 12/01/2022] Open
Abstract
Alginate-based composite sponges were developed as carriers to prolong the gastric retention time and controlled release of curcumin-loaded self-microemulsifying drug delivery systems (Cur-SMEDDS). Liquid Cur-SMEDDS was incorporated into a solution made up of a mixture of polymers and converted into a solid form by freeze-drying. The ratio of alginate as the main polymer, adsorbent (colloidal silicon dioxide), and additional polymers—sodium carboxymethyl cellulose (SCMC), hydroxypropyl methylcellulose (HPMC)—was varied systematically to adjust the drug loading and entrapment efficiency, sponge buoyancy, and the release profile of Cur-SMEDDS. The optimum composite sponge was fabricated from a 4% alginate and 2% HPMC mixed solution. It immediately floated on simulated gastric fluid (SGF, pH 1.2) and remained buoyant over an 8 h period. The formulation exhibited an emulsion droplet size of approximately 30 nm and provided sustained release of Cur-SMEDDS in SGF, reaching 71% within 8 h compared with only 10% release from curcumin powder. This study demonstrates the potential of alginate-based composite sponges combined with self-microemulsifying formulations for gastroretention applications involving poorly soluble compounds.
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Abuhelwa AY, Williams DB, Upton RN, Foster DJ. Food, gastrointestinal pH, and models of oral drug absorption. Eur J Pharm Biopharm 2017; 112:234-248. [DOI: 10.1016/j.ejpb.2016.11.034] [Citation(s) in RCA: 97] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Revised: 11/27/2016] [Accepted: 11/29/2016] [Indexed: 12/14/2022]
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Van Den Abeele J, Rubbens J, Brouwers J, Augustijns P. The dynamic gastric environment and its impact on drug and formulation behaviour. Eur J Pharm Sci 2017; 96:207-231. [DOI: 10.1016/j.ejps.2016.08.060] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Revised: 08/30/2016] [Accepted: 08/30/2016] [Indexed: 02/08/2023]
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Pan Q, Lv Y, Williams GR, Tao L, Yang H, Li H, Zhu L. Lactobionic acid and carboxymethyl chitosan functionalized graphene oxide nanocomposites as targeted anticancer drug delivery systems. Carbohydr Polym 2016; 151:812-820. [DOI: 10.1016/j.carbpol.2016.06.024] [Citation(s) in RCA: 98] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Revised: 05/20/2016] [Accepted: 06/04/2016] [Indexed: 11/29/2022]
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68
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Diós P, Szigeti K, Budán F, Pócsik M, Veres DS, Máthé D, Pál S, Dévay A, Nagy S. Influence of barium sulfate X-ray imaging contrast material on properties of floating drug delivery tablets. Eur J Pharm Sci 2016; 95:46-53. [PMID: 27687639 DOI: 10.1016/j.ejps.2016.09.034] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2016] [Revised: 09/16/2016] [Accepted: 09/25/2016] [Indexed: 11/27/2022]
Abstract
The objective of the study was to reveal the influence of necessarily added barium sulfate (BaSO4) X-ray contrast material on floating drug delivery tablets. Based on literature survey, a chosen floating tablet composition was determined containing HPMC and carbopol 943P as matrix polymers. One-factor factorial design with five levels was created for evaluation of BaSO4 (X1) effects on experimental parameters of tablets including: floating lag time, total floating time, swelling-, erosion-, dissolution-, release kinetics parameters and X-ray detected volume changes of tablets. Applied concentrations of BaSO4 were between 0 and 20.0% resulting in remarkable alteration of experimental parameters related especially to flotation. Drastic deterioration of floating lag time and total floating time could be observed above 15.0% BaSO4. Furthermore, BaSO4 showed to increase the integrity of tablet matrix by reducing eroding properties. A novel evaluation of dissolutions from floating drug delivery systems was introduced, which could assess the quantity of drug dissolved from dosage form in floating state. In the cases of tablets containing 20.0% BaSO4, only the 40% of total API amount could be dissolved in floating state. In vitro fine resolution X-ray CT imagings were performed to study the volume change and the voxel distributions as a function of HU attenuations by histogram analysis of the images. X-ray detected relative volume change results did not show significant difference between samples. After 24h, all tablets containing BaSO4 could be segmented, which highlighted the fact that enough BaSO4 remained in the tablets for their identification.
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Affiliation(s)
- Péter Diós
- Institute of Pharmaceutical Technology and Biopharmacy, University of Pécs, Rókus str. 2, H-7624 Pécs, Hungary.
| | - Krisztián Szigeti
- Department of Biophysics and Radiation Biology, Semmelweis University, Tűzoltó utca 37-47, H-1094 Budapest, Hungary
| | - Ferenc Budán
- CROmed Translational Research Centers, Baross str. 91-95, H-1047 Budapest, Hungary; Department of Public Health Medicine, University of Pécs, Szigeti str. 12, H-7624 Pécs, Hungary
| | - Márta Pócsik
- CROmed Translational Research Centers, Baross str. 91-95, H-1047 Budapest, Hungary
| | - Dániel S Veres
- Department of Biophysics and Radiation Biology, Semmelweis University, Tűzoltó utca 37-47, H-1094 Budapest, Hungary
| | - Domokos Máthé
- Department of Biophysics and Radiation Biology, Semmelweis University, Tűzoltó utca 37-47, H-1094 Budapest, Hungary; CROmed Translational Research Centers, Baross str. 91-95, H-1047 Budapest, Hungary
| | - Szilárd Pál
- Institute of Pharmaceutical Technology and Biopharmacy, University of Pécs, Rókus str. 2, H-7624 Pécs, Hungary
| | - Attila Dévay
- Institute of Pharmaceutical Technology and Biopharmacy, University of Pécs, Rókus str. 2, H-7624 Pécs, Hungary
| | - Sándor Nagy
- Institute of Pharmaceutical Technology and Biopharmacy, University of Pécs, Rókus str. 2, H-7624 Pécs, Hungary
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69
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Ma PJ, Gao GJ, Chang HG, Shen FZ, Hui L, Jin BZ. Prolonged and Floating Drug Delivery System of Gabapentin for Effective Management of Pain in Spinal Cord Injury. INT J PHARMACOL 2016. [DOI: 10.3923/ijp.2016.435.439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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70
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Choudhary S, Jain A, Amin MCIM, Mishra V, Agrawal GP, Kesharwani P. Stomach specific polymeric low density microballoons as a vector for extended delivery of rabeprazole and amoxicillin for treatment of peptic ulcer. Colloids Surf B Biointerfaces 2016; 141:268-277. [DOI: 10.1016/j.colsurfb.2016.01.048] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2015] [Revised: 12/20/2015] [Accepted: 01/26/2016] [Indexed: 12/18/2022]
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71
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Verma A, Dubey J, Hegde RR, Rastogi V, Pandit JK. Helicobacter pylori: past, current and future treatment strategies with gastroretentive drug delivery systems. J Drug Target 2016; 24:897-915. [DOI: 10.3109/1061186x.2016.1171326] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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72
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Quality by design approach for development and optimization of Quetiapine Fumarate effervescent floating matrix tablets for improved oral bioavailability. JOURNAL OF PHARMACEUTICAL INVESTIGATION 2016. [DOI: 10.1007/s40005-016-0232-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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73
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Patil H, Tiwari RV, Repka MA. Recent advancements in mucoadhesive floating drug delivery systems: A mini-review. J Drug Deliv Sci Technol 2016. [DOI: 10.1016/j.jddst.2015.12.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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74
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Zhao Q, Gao B, Ma L, Lian J, Deng L, Chen J. Innovative intragastric ascaridole floating tablets: Development, optimization, and in vitro–in vivo evaluation. Int J Pharm 2015; 496:432-9. [DOI: 10.1016/j.ijpharm.2015.10.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 09/19/2015] [Accepted: 10/03/2015] [Indexed: 11/24/2022]
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75
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Vo AQ, Feng X, Morott JT, Pimparade MB, Tiwari RV, Zhang F, Repka MA. A novel floating controlled release drug delivery system prepared by hot-melt extrusion. Eur J Pharm Biopharm 2015; 98:108-21. [PMID: 26643801 DOI: 10.1016/j.ejpb.2015.11.015] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Revised: 10/19/2015] [Accepted: 11/23/2015] [Indexed: 11/16/2022]
Abstract
Floating dosage forms are an important formulation strategy for drugs with a narrow absorption window and low intestinal solubility, and for localized gastric treatment. Novel floating pellets were prepared using the hot-melt extrusion (HME) technology. Uniformly foamed strands were created by liquid injection pumping and screw configuration modification. The ammonio methacrylate copolymer (Eudragit® RSPO) foaming structure was formed by a liquid-vapor phase transition inside the strand upon die exiting resulting from the sudden decrease in external pressure, vaporizing the liquid ethanol and vacating the extruded material. This generated uniform vacuous regions in the extrudate. The pellets' internal structure was investigated using scanning electron microscopy (SEM). The formulation constituents' and processing parameters' effects on the drug release profiles, floating force, and the pellets' micromeritic properties were evaluated by design of experiments: all formulations showed zero lag time and excellent floating strength, indicating immediate-floating pellet formation. The pellets' drug release profiles were controlled by multiple independent variables at different time points (⩽ 24 h). Drug loading significantly affected drug release within the first hour, the hydroxypropyl methylcellulose (HPMC) content thereafter. Understanding the variables' effects on the formulations allows for the tailoring of this delivery system to obtain various drug release profiles.
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Affiliation(s)
- Anh Q Vo
- Department of Pharmaceutics and Drug Delivery, School of Pharmacy, The University of Mississippi, University, MS 38677, USA
| | - Xin Feng
- Department of Pharmaceutics and Drug Delivery, School of Pharmacy, The University of Mississippi, University, MS 38677, USA
| | - Joseph T Morott
- Department of Pharmaceutics and Drug Delivery, School of Pharmacy, The University of Mississippi, University, MS 38677, USA
| | - Manjeet B Pimparade
- Department of Pharmaceutics and Drug Delivery, School of Pharmacy, The University of Mississippi, University, MS 38677, USA
| | - Roshan V Tiwari
- Department of Pharmaceutics and Drug Delivery, School of Pharmacy, The University of Mississippi, University, MS 38677, USA
| | - Feng Zhang
- College of Pharmacy, The University of Texas at Austin, Austin, TX 78712, USA
| | - Michael A Repka
- Department of Pharmaceutics and Drug Delivery, School of Pharmacy, The University of Mississippi, University, MS 38677, USA; Pii Center for Pharmaceutical Technology, The University of Mississippi, University, MS 38677, USA.
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Gastroretentive carrier systems in the delivery of therapeutic actives: an updated patent review. Pharm Pat Anal 2015; 4:453-74. [PMID: 26580994 DOI: 10.4155/ppa.15.34] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Gastroretentive drug-delivery systems have the potential to prolong the gastric retention time and provide controlled/sustained release of a drug at the absorption site, thereby improving the bioavailability. Advantageous features include reduction in dose, side effects and dosing frequency. Research inputs have led to exploration of novel gastroretentive systems. The present review explores various patents issued on gastroretentive drug delivery on the basis of the therapeutic category of drugs. It traces US, EP and WIPO patents issued in the last 10 years. Various patents have revealed that gastrocarriers can effectively enhance therapeutic activity of a drug. Drugs acting on the CNS have been prominently investigated, followed by antimicrobials and locally acting drugs. Areas of future research can be drugs acting on the cardiovascular system.
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77
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Razavi M, Karimian H, Yeong CH, Chung LY, Nyamathulla S, Noordin MI. Gamma scintigraphic evaluation of floating gastroretentive tablets of metformin HCl using a combination of three natural polymers in rabbits. DRUG DESIGN DEVELOPMENT AND THERAPY 2015; 9:4373-86. [PMID: 26273196 PMCID: PMC4532171 DOI: 10.2147/dddt.s86263] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The present research was aimed at formulating a metformin HCl sustained-release formulation from a combination of polymers, using the wet granulation technique. A total of 16 formulations (F1–F16) were produced using different combinations of the gel-forming polymers: tamarind kernel powder, salep (palmate tubers of Orchis morio), and xanthan. Post-compression studies showed that there were no interactions between the active drug and the polymers. Results of in vitro drug-release studies indicated that the F10 formulation which contained 5 mg of tamarind kernel powder, 33.33 mg of xanthan, and 61.67 mg of salep could sustain a 95% release in 12 hours. The results also showed that F2 had a 55% similarity factor with the commercial formulation (C-ER), and the release kinetics were explained with zero order and Higuchi models. The in vivo study was performed in New Zealand White rabbits by gamma scintigraphy; the F10 formulation was radiolabeled using samarium (III) oxide (153Sm2O3) to trace transit of the tablets in the gastrointestinal tract. The in vivo data supported the retention of F10 formulation in the gastric region for 12 hours. In conclusion, the use of a combination of polymers in this study helped to develop an optimal gastroretentive drug-delivery system with improved bioavailability, swelling, and floating characteristics.
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Affiliation(s)
- Mahboubeh Razavi
- Department of Pharmacy, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Hamed Karimian
- Department of Pharmacy, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Chai Hong Yeong
- Department of Biomedical Imaging and University Malaya Research Imaging Centre, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Lip Yong Chung
- Department of Pharmacy, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Shaik Nyamathulla
- Department of Pharmacy, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Mohamed Ibrahim Noordin
- Department of Pharmacy, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia ; Center for Natural Products and Drug Discovery (CENAR), Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
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78
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Abouelatta SM, Aboelwafa AA, Khalil RM, El-Gazayerly ON. Utilization of ionotropic gelation technique for bioavailability enhancement of cinnarizine: in-vitro optimization and in-vivo performance in human. Drug Deliv 2015; 23:2736-2746. [PMID: 26165421 DOI: 10.3109/10717544.2015.1064187] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Gastro retentive drug delivery system techniques were adopted to deliver drugs having narrow absorption window from a particular site in the GIT. Therefore, gastro retentive dosage forms were retained in the stomach, thus improving absorption and bioavailability would be improved consequently. In this study, cinnarizine (CNZ) was employed as the model drug. CNZ is a poorly soluble basic drug, suffering from low and erratic bioavailability. This is attributed to its pH-dependant solubility (highly soluble at pH < 4). CNZ is characterized by short half-life (3-6 h). Accordingly, floating CNZ emulsion gel calcium pectinate beads were developed. A mixture design was employed to study the effect of the percent of LM pectin (A), the percent of GMO (B) and the percent of Labrafac Lipophile (C) simultaneously on the percent of drug released and loaded. The optimized floating CNZ emulsion gel calcium pectinate beads and Stugeron® (the marketed reference product) were compared through a pharmacokinetic study carried on healthy human volunteers. Fortunately, simple floating CNZ emulsion gel calcium pectinate beads were prepared with zero-order release profile for 12 h. A promising in-vivo CNZ controlled release dosage form with higher bioavailability, when compared to once daily administration of Stugeron® tablets was achieved.
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Affiliation(s)
- Samar M Abouelatta
- a Department of Pharmaceutics, Faculty of Pharmacy , Ahram Canadian University , Cairo , Egypt
| | - Ahmed A Aboelwafa
- b Department of Pharmaceutics, Faculty of Pharmacy , Cairo University , Cairo , Egypt , and
| | - Rawia M Khalil
- c National Research Centre (NRC), Pharmaceutical Technology , Dokki , Cairo , Egypt
| | - Omaima N El-Gazayerly
- b Department of Pharmaceutics, Faculty of Pharmacy , Cairo University , Cairo , Egypt , and
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79
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Kanwar N, Kumar R, Sarwal A, Sinha VR. Preparation and evaluation of floating tablets of pregabalin. Drug Dev Ind Pharm 2015; 42:654-60. [PMID: 26146770 DOI: 10.3109/03639045.2015.1062895] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Floating tablets of pregabalin were prepared using different concentrations of the gums (xanthan gum and guar gum), Carbopol 974P NF and HPMC K100. Optimized formulations were studied for physical tests, floating time, swelling behavior, in vitro release studies and stability studies. In vitro drug release was higher for tablet batches containing guar and xanthan gum as compared to the batches containing Carbopol 974P NF. Tablet batches were subjected to stability studies and evaluated by different parameters (drug release, drug content, FTIR and DSC studies). The optimized tablet batch was selected for in vivo pharmacodynamic studies (PTZ induced seizures). The results obtained showed that the onset of jerks and clonus were delayed and extensor phase was abolished with time in treated groups. A significant difference (p > 0.05) was observed in control and treated group behavior indicating an excellent activity of the formulation for a longer period (>12 h).
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Affiliation(s)
| | | | | | - V R Sinha
- a UIPS, Panjab University , Chandigarh , India
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81
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In-vitro and in-vivo evaluation of repaglinide loaded floating microspheres prepared from different viscosity grades of HPMC polymer. Saudi Pharm J 2015; 23:675-82. [PMID: 26702263 PMCID: PMC4669415 DOI: 10.1016/j.jsps.2015.02.013] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2015] [Accepted: 02/20/2015] [Indexed: 11/30/2022] Open
Abstract
During the study repaglinide encapsulated floating microspheres were formulated and characterized for enhancing residence time of drug in git and thereby increasing its bioavailability. Floating microspheres of ethylcellulose (EC) and hydroxypropyl methyl cellulose (HPMC) (5 and 100 cps) were prepared by emulsion solvent diffusion technique. During process optimization various parameters were studied such as: drug: polymer ratio, polymer ratio, concentration of emulsifier and stirring speed. Selected optimized formulations were studied for SEM, entrapment, floating behavior, drug release and kinetics. In-vivo floating ability (X-ray) study and in-vivo antidiabetic activity were performed on alloxan induced diabetic rats. Microspheres prepared with different viscosity grade HPMC were spherical shaped with smooth surface. Size of microspheres was in the range of 181.1–248 μm. Good entrapment and buoyancy were observed for 12 h. X-ray image showed that optimized formulation remained buoyant for more than 6 h. Optimized formulation treated group shows significant (p < 0.01) reduction in blood glucose level as compared to pure drug treated group. Repaglinide loaded floating microspheres expected to give new choice for safe, economical and increased bioavailable formulation for effective management of NIDDM.
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82
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83
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Kaushik AY, Tiwari AK, Gaur A. Role of excipients and polymeric advancements in preparation of floating drug delivery systems. Int J Pharm Investig 2015; 5:1-12. [PMID: 25599027 PMCID: PMC4286829 DOI: 10.4103/2230-973x.147219] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Since decade or two, the development of floating drug delivery systems becomes a significant and novel tool as having low density than gastric content. There are various advanced polymers including chitosan, eudragit, etc., and excipients such as; pore forming agent, surfactants, etc. All of them are discussed briefly, and results are concluded from various reputed researches. We have discussed all natural and synthetic systems with their effect on the release and other parameters which are essential for the floating formulation development.
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Affiliation(s)
- Avinash Y Kaushik
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Jaipur National University, Jaipur, India
| | - Ajay K Tiwari
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Jaipur National University, Jaipur, India
| | - Ajay Gaur
- Department of Pharmaceutics, Lachoo Memorial College of Science and Technology, Jodhpur, Rajasthan, India
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84
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Kriangkrai W, Puttipipatkhachorn S, Sriamornsak P, Pongjanyakul T, Sungthongjeen S. Impact of anti-tacking agents on properties of gas-entrapped membrane and effervescent floating tablets. AAPS PharmSciTech 2014; 15:1357-69. [PMID: 24927669 DOI: 10.1208/s12249-014-0161-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Accepted: 05/22/2014] [Indexed: 11/30/2022] Open
Abstract
Tackiness caused by the gas-entrapped membrane (Eudragit(®)RL 30D) was usually observed during storage of the effervescent floating tablets, leading to failure in floatation and sustained release. In this work, common anti-tacking agents (glyceryl monostearate (GMS) and talc) were used to solve this tackiness problem. The impact of anti-tacking agent on the properties of free films and corresponding floating tablets was investigated. GMS was more effective than talc in reducing tackiness of the film. Addition and increasing amount of anti-tacking agents lowered the film mechanical strength, but the coating films were still strong and flexible enough to resist the generated gas pressure inside the floating tablet. Wettability and water vapor permeability of the film decreased with increasing level of anti-tacking agents as a result of their hydrophobicity. No interaction between anti-tacking agents and polymer was observed as confirmed by Fourier transform infrared spectroscopy, powder X-ray diffractometry, and differential scanning calorimetry studies. Increasing amount of anti-tacking agents decreased time to float and tended to retard drug release of the floating tablets. Floating properties and drug release were also influenced by type of anti-tacking agents. The obtained floating tablets still possessed good floating properties and controlled drug release even though anti-tacking agent had some effects. The results demonstrated that the tackiness problem of the floating tablets could be solved by incorporating anti-tacking agent into the gas-entrapped membrane.
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85
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Sharma OP, Shah MV, Parikh DC, Mehta TA. Formulation optimization of gastroretentive drug delivery system for allopurinol using experimental design. Expert Opin Drug Deliv 2014; 12:513-24. [DOI: 10.1517/17425247.2014.944861] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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86
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He W, Li Y, Zhang R, Wu Z, Yin L. Gastro-floating bilayer tablets for the sustained release of metformin and immediate release of pioglitazone: preparation and in vitro/in vivo evaluation. Int J Pharm 2014; 476:223-31. [PMID: 25283698 DOI: 10.1016/j.ijpharm.2014.09.056] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Revised: 09/17/2014] [Accepted: 09/29/2014] [Indexed: 11/15/2022]
Abstract
Owing to the complementary mechanisms of action of metformin hydrochloride (MH) and pioglitazone hydrochloride (PG), combination therapy for type 2 diabetes mellitus using the two drugs is highly desired; on the other hand, MH is not well absorbed in lower gastrointestinal tract and has a short half-life, therefore compromising the therapeutic effects. Herein, the present study was to develop gastro-floating bilayer matrix tablets in which the two drugs were incorporated into two separate layers, aiming at sustaining MH release with enhanced absorption and achieving immediate release of PG. The tablets of the optimized formulation floated on the test medium for more than 24 h with 5 min of floating lag time, and sustained MH release for 12 h via a diffusion-dependent manner; and complete release of PG within 5 min were achieved. Moreover, a steady plasma concentration of MH with a 1.5-fold increase in bioavailability, decreased C(max) and reduced T(max) was obtained, and the in vivo behavior of PG was similar to the marked product. Summarily, sustained MH release with improved absorption and immediate release of PG were obtained simultaneously using the gastro-floating bilayer tablet, allowing strengthened combination therapy for diabetes mellitus.
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Affiliation(s)
- Wei He
- State Key Laboratory of Natural Medicines, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, PR China
| | - Yongji Li
- State Key Laboratory of Natural Medicines, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, PR China
| | - Rao Zhang
- State Key Laboratory of Natural Medicines, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, PR China
| | - Zhannan Wu
- State Key Laboratory of Natural Medicines, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, PR China
| | - Lifang Yin
- State Key Laboratory of Natural Medicines, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, PR China.
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87
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Malik R, Garg T, Goyal AK, Rath G. Polymeric nanofibers: targeted gastro-retentive drug delivery systems. J Drug Target 2014; 23:109-24. [DOI: 10.3109/1061186x.2014.965715] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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88
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Razavi M, Nyamathulla S, Karimian H, Noordin MI. Novel swellable polymer of orchidaceae family for gastroretentive drug delivery of famotidine. DRUG DESIGN DEVELOPMENT AND THERAPY 2014; 8:1315-29. [PMID: 25246773 PMCID: PMC4166908 DOI: 10.2147/dddt.s68517] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study aimed to develop hydrophilic, gastroretentive matrix tablets of famotidine with good floating and swelling properties. A novel gastroretentive drug delivery formulation was designed using salep, also known as salepi, a flour obtained from grinding dried palmate tubers of Orchis morio var mascula (Orchidaceae family). The main polysaccharide content of salep is glucomannan, highly soluble in cold and hot water, which forms a viscous solution. Salep was characterized for physicochemical properties, thermal stability, chemical interaction, and surface morphology using X-ray diffraction analysis, differential scanning calorimetry, Fourier transform infrared spectroscopy, and scanning electron microscopy. Ten different formulations (S1–S10) were prepared using famotidine to salep ratios from 1:0.5 to 1:5. Results demonstrated that all formulations were able to sustain the drug release for more than 24 hours. The S5 formulation, with a famotidine to salep ratio of 1:2.5, had the shortest floating lag time of 35 seconds and 100% drug release within 24 hours. The dissolution data were fitted into popular mathematical models to assess the mechanism of drug release. S5 showed Zero order release (R=0.9746) with Higuchi diffusion (R=0.9428). We conclude that salep, a novel polymer, can be used in controlled release formulations to sustain release for 24 hours, due to inherent swelling and gelling properties.
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Affiliation(s)
- Mahboubeh Razavi
- Department of Pharmacy, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Shaik Nyamathulla
- Department of Pharmacy, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia ; Center for Natural Products and Drug Discovery, Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - Hamed Karimian
- Department of Pharmacy, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Mohamed Ibrahim Noordin
- Department of Pharmacy, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia ; Center for Natural Products and Drug Discovery, Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
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89
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Razavi M, Nyamathulla S, Karimian H, Moghadamtousi SZ, Noordin MI. Hydrogel polysaccharides of tamarind and xanthan to formulate hydrodynamically balanced matrix tablets of famotidine. Molecules 2014; 19:13909-31. [PMID: 25197930 PMCID: PMC6271721 DOI: 10.3390/molecules190913909] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2014] [Revised: 08/25/2014] [Accepted: 08/28/2014] [Indexed: 11/18/2022] Open
Abstract
The gastroretentive dosage form of famotidine was modified using tamarind seed powders to prolong the gastric retention time. Tamarind seeds were used in two different forms having different swelling and gelling properties: with husk (TSP) or without husk (TKP). TKP (TKP1 to TKP 6) and TSP (TSP1 to TSP 6) series were prepared using tamarind powder:xanthan in the ratios of 5:0, 4:1, 3:2, 2:3, 1:4, 0:5, respectively. The matrix tablets were prepared by the wet granulation method and evaluated for pharmacopoeial requirements. TKP2 was the optimum formulation as it had a short floating lag time (FLT < 30 s) and more than 98.5% drug release in 12 h. The dissolution data were fitted to popular mathematical models to assess the mechanism of drug release, and the optimum formulation showed a predominant first order release and diffusion mechanism. It was concluded that the TKP2 prepared using tamarind kernel powder:xanthan (4:1) was the optimum formulation with shortest floating lag time and more than 90% release in the determined period of time.
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Affiliation(s)
- Mahboubeh Razavi
- Department of Pharmacy, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia.
| | - Shaik Nyamathulla
- Department of Pharmacy, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia.
| | - Hamed Karimian
- Department of Pharmacy, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia.
| | - Soheil Zorofchian Moghadamtousi
- Biomolecular Research Group, Biochemistry Program, Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia.
| | - Mohamed Ibrahim Noordin
- Department of Pharmacy, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia.
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90
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Kim YC, Edelhauser HF, Prausnitz MR. Particle-stabilized emulsion droplets for gravity-mediated targeting in the posterior segment of the eye. Adv Healthc Mater 2014; 3:1272-82. [PMID: 24652782 DOI: 10.1002/adhm.201300696] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2013] [Revised: 02/12/2014] [Indexed: 02/02/2023]
Abstract
This study tests the hypothesis that high-density particle-stabilized emulsion droplets (PEDs) can be designed to use gravity to target specific locations in the eye via suprachoroidal space injection. PEDs contain a core of high-density perfluorodecalin measuring ≤35 μm in diameter surrounded and stabilized by fluorescein-tagged, polystyrene nanoparticles that simulate polymeric drug carriers. A hollow microneedle infuses PEDs into the suprachoroidal space of rabbit eyes in vivo, which are later dissected and imaged to quantify distribution of fluorescent nanoparticles within the suprachoroidal space. With cornea oriented upward, such that gravity should move PEDs toward the back of the eye, up to 50% of nanoparticles are in the most posterior quadrant near the macula immediately after injection and 5 d later. With cornea oriented downward, to promote PED movement toward the front of the eye, approximately 60% of injected nanoparticles are targeted to the most anterior quadrant of the posterior segment near ciliary body. Injection of approximately neutral-density particles of the same size shows approximately equal distribution throughout the posterior segment. This study demonstrates for the first time that high-density PEDs can be used to deliver nanoparticles to specific locations in the back of the eye, including targeted delivery to the macula.
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Affiliation(s)
- Yoo C. Kim
- School of Chemical and Biomolecular Engineering; Georgia Institute of Technology; 311 Ferst Drive NW Atlanta GA 30332 USA
| | - Henry F. Edelhauser
- Department of Ophthalmology; Emory University School of Medicine; 1365 Clifton Rd NE Atlanta GA 30322 USA
| | - Mark R. Prausnitz
- School of Chemical and Biomolecular Engineering; Georgia Institute of Technology; 311 Ferst Drive NW Atlanta GA 30332 USA
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91
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Eisenächer F, Garbacz G, Mäder K. Physiological relevant in vitro evaluation of polymer coats for gastroretentive floating tablets. Eur J Pharm Biopharm 2014; 88:778-86. [PMID: 25086221 DOI: 10.1016/j.ejpb.2014.07.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Revised: 07/17/2014] [Accepted: 07/21/2014] [Indexed: 12/27/2022]
Abstract
Gastroretentive drug delivery systems are retained in the stomach for a sufficient time interval, releasing the drug in a controlled manner. According to literature, the floating principle is the most frequently used formulation approach for gastric retention. However, many publications lack information of the floating forces, the impact of different pH-values and almost no information exist concerning the resistance of the floating performance against physiological relevant stress. Therefore, we evaluated the performance of CO2-generating floating bilayer (drug and floating layer) tablets with respect to robustness, drug release profile, pH dependence and floating behaviour. Bilayer tablets were coated with a flexible and water permeable, but CO2-retaining polymer film of either polyvinyl acetate or ammonio-methacrylate copolymer type A. Metformin-HCl was used as a relevant model drug due to its dose-dependent and saturable absorption from the proximal part of the small intestine. To mimic physiological relevant mechanical stress conditions, recently developed dissolution stress tests with pulsed pressures were applied in addition to release studies according to the pharmacopeia. Bilayer tablets coated with polyvinyl acetate showed short floating lag times, reasonable floating strength values, floating durations of more than 24h in simulated gastric fluid and a robust and pH independent release of Metformin-HCl. Tablets coated with ammonio-methacrylate copolymer type A showed a higher permeability for the active ingredient combined with a decreased robustness of the inflated tablets. Both polymers can be used for balloon-like floating devices. The appropriate polymer has to be chosen dependent from the properties of the active ingredient and requested application of the delivery device. Furthermore, the dissolution stress test analysis is able to indicate possible safety issues of gastroretentive formulations as well as to characterise the robustness of formulation principles towards mechanical stresses of bio-relevant intensity.
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Affiliation(s)
- Friederike Eisenächer
- Institute of Pharmacy, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
| | | | - Karsten Mäder
- Institute of Pharmacy, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany.
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92
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Awasthi R, Kulkarni GT. Decades of research in drug targeting to the upper gastrointestinal tract using gastroretention technologies: where do we stand? Drug Deliv 2014; 23:378-94. [PMID: 25026414 DOI: 10.3109/10717544.2014.936535] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
A major constraint in oral controlled release drug delivery is that not all the drug candidates are absorbed uniformly throughout the gastrointestinal tract (GIT). Drugs having "absorption window" are absorbed in a particular portion of GIT only or are absorbed to a different extent in various segments of the GIT. Thus, only the drug released in the region preceding and in close vicinity to the absorption window is available for absorption. The drug must be released from the dosage form in solution form; otherwise, it is generally not absorbed. Hence, much research has been dedicated to the development of gastroretentive drug delivery systems that may optimize the bioavailability and subsequent therapeutic efficacy of such drugs, as these systems have unique properties to bypass the gastric emptying process. These systems show excellent in vitro results but fail to give desirable in vivo performance. During the last 2-3 decades, researchers from the academia and industries are giving considerable importance in this field. Unfortunately, till date, few so-called gastroretentive dosage forms have been brought to the market in spite of numerous academic publications. The manuscript considers strategies that are commonly used in the development of gastroretentive drug delivery systems with a special attention on various parameters, which needs to be monitored during formulation development.
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Affiliation(s)
- Rajendra Awasthi
- a Department of Pharmaceutical Science, Research and Development Cell , Jawaharlal Nehru Technological University , Kukatpally, Hyderabad , Andhra Pradesh , India .,b Department of Pharmaceutics , Laureate Institute of Pharmacy , Kathog, Tehsil, Dehra, District Kangra , Himachal Pradesh , India , and
| | - Giriraj T Kulkarni
- c School of Pharmaceutical Science , ITM University , Gwaliar , Madhya Pradesh , India
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93
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Eberle VA, Schoelkopf J, Gane PA, Alles R, Huwyler J, Puchkov M. Floating gastroretentive drug delivery systems: Comparison of experimental and simulated dissolution profiles and floatation behavior. Eur J Pharm Sci 2014; 58:34-43. [DOI: 10.1016/j.ejps.2014.03.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Revised: 01/17/2014] [Accepted: 03/10/2014] [Indexed: 10/25/2022]
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94
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Gaikwad VD, Yadav VD, Gaikwad MD. Novel sustained release and swellable gastroretentive dosage form for ciprofloxacin hydrochloride. Int J Pharm Investig 2014; 4:88-92. [PMID: 25006553 PMCID: PMC4083538 DOI: 10.4103/2230-973x.133057] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
INTRODUCTION The present study aims at developing a gastroretentive swellable and floating matrix tablet formulation of ciprofloxacin hydrochloride (HCl) for the effective treatment of infections caused by susceptible organisms. Ciprofloxacin HCl is a fluoroquinoline antibiotic drug. Ciprofloxacin HCl is more stable in acidic medium and it has a narrow absorption window which is sited at the stomach and proximal portions of the small intestine, so it covers the required criteria for selection of drug for gastroretentive dosage form. MATERIALS AND METHODS Ciprofloxacin HCl gastroretentive tablets were formulated by using direct compression method and different grades of hydroxypropyl methylcellulose as suspending and stabilizing agent (polymer), sodium starch glycolate (SSG), crospovidone as disintegrates, sodium bicarbonate as alkalizing agent and magnesium stearate as lubricant. RESULTS The tablets were evaluated for post compression parameters. All the parameters were within the pharmacopoeial limits. CONCLUSION The in vitro dissolution studies showed that the drug release was fast in formulations F2, F4 and F6 containing SSG as super disintegrant when compared with all other formulations. In SEM study of F2 formulation shows maximum swelling and porosity observed after 12 h. Hence, formulation F2 shows the best formulation among the six formulations containing different binders and super disintegrants.
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Affiliation(s)
- Vinay Dhananjay Gaikwad
- Department of Pharmaceutics, Arvind Gavali College of Pharmacy, Jaitapur, Satara, Maharashtra, India
| | - Vishal Dadasaheb Yadav
- Department of Pharmaceutics, Arvind Gavali College of Pharmacy, Jaitapur, Satara, Maharashtra, India
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95
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Jain A, Pandey V, Ganeshpurkar A, Dubey N, Bansal D. Formulation and characterization of floating microballoons of Nizatidine for effective treatment of gastric ulcers in murine model. Drug Deliv 2014; 22:306-11. [DOI: 10.3109/10717544.2014.891273] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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96
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Malakar J, Datta PK, Purakayastha SD, Dey S, Nayak AK. Floating capsules containing alginate-based beads of salbutamol sulfate: In vitro–in vivo evaluations. Int J Biol Macromol 2014; 64:181-9. [DOI: 10.1016/j.ijbiomac.2013.11.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2013] [Revised: 10/21/2013] [Accepted: 11/22/2013] [Indexed: 10/25/2022]
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97
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Patil SH, Talele GS. Natural gum as mucoadhesive controlled release carriers: evaluation of cefpodoxime proxetil by D-optimal design technique. Drug Deliv 2014; 21:118-29. [PMID: 24032629 DOI: 10.3109/10717544.2013.834416] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The present study deals with the development of mucoadhesive controlled release tablets of Cefpodoxime Proxetil to increase the gastric residence time and thus prolong drug release, reduce dosing frequency and improve oral bioavailability. Tablets were prepared using sodium alginate and karaya gum, a natural polymer, with a synthetic polymer hydroxypropylmethylcellulose (K100LV) and Karaya gum with HPMC K100LV in various ratios to optimize the drug release profile using D-Optimal technique. Pre- and post-compression parameters of tablets prepared with various formulations (S1-S9, C1-C9) were evaluated. The FTIR and DSC studies revealed that no physiochemical interaction between excipients and drug. The formulation S7 showed prolonged drug release, and the mechanism of drug release from the optimized formulation was confirmed using the Korsmeyer-Peppas model to be non-Fickian release transport and n value was found 0.605 indicating both diffusion and erosion mechanism from these natural gums. The optimized formulation showed mucoadhesive strength >35 g. An in vivo study was performed on rabbits using an X-ray imaging technique. The radiological evidence suggests that the tablets adheres (more than 10 hours) to a rabbit's stomach. No significant changes were found in the physical appearance, drug content, mucoadhesive study and in vitro dissolution pattern after storage at 40 °C/75% relative humidity for 3 months.
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Affiliation(s)
- Satish H Patil
- Department of Pharmaceutics, R.C. Patel Institute of Pharmaceutical Education and Research , Shirpur (M.S), Maharashtra , India and
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98
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Radwan MA, Abou El Ela AESF, Hassan MA, El-Maraghy DA. Pharmacokinetics and analgesic effect of ketorolac floating delivery system. Drug Deliv 2014; 22:320-7. [PMID: 24512312 DOI: 10.3109/10717544.2014.883189] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVES The efficacy of ketorolac tromethamine (KT) floating alginate beads as a drug delivery system for better control of KT release was investigated. The formulation with the highest drug loading, entrapment efficiency, swelling, buoyancy, and in vitro release would be selected for further in vivo analgesic effect in the mice and pharmacokinetics study in rats compared to the tablet dosage form. METHODS KT floating alginate beads were prepared by extrusion congealing technique. KT in plasma samples was analyzed using a UPLC MS/MS assay. RESULTS The percentage yield, drug loading and encapsulation efficiency were increased proportionally with the hydroxypropylmethyl cellulose (HPMC) polymer amount in the KT floating beads. A reverse relationship was observed between HPMC amount in the beads and the KT in vitro release rate. F3-floating beads were selected, due to its better in vitro results (continued floating for >8 h) than others. A longer analgesic effect was observed for F3 in fed mice as compared to the tablets. After F3 administration to rats, the Cmax (2.2 ± 0.3 µg/ml) was achieved at ∼2 h and the decline in KT concentration was slower. F3 showed a significant increase in the AUC (1.89 fold) in rats as compared to the tablets. CONCLUSION KT was successfully formulated as floating beads with prolonged in vitro release extended to a better in vivo characteristic with higher bioavailability in rats. KT in floating beads shows a superior analgesic effect over tablets, especially in fed mice.
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Affiliation(s)
- Mahasen A Radwan
- Department of Pharmaceutical Practice, College of Pharmacy, Princess Nourah bint Abdulrahman University , Riyadh , Saudi Arabia
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99
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Patil S, Talele GS. Gastroretentive mucoadhesive tablet of lafutidine for controlled release and enhanced bioavailability. Drug Deliv 2014; 22:312-9. [PMID: 24471787 DOI: 10.3109/10717544.2013.877099] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Lafutidine a newly developed histamine H2-receptor antagonist having biological half-life of 1.92 ± 0.94 h due to its selective absorption from upper part of gastrointestinal tract the development of mucoadhesive sustained release drug delivery system is recommended in order to enhance the bioavailability. A mucoadhesive tablets was developed using the natural polymer, sodium alginate, xanthan gum and karaya gum. Mucoadhesion is a complex phenomenon which involves wetting, adsorption and interpenetration of polymer chains. The prepared tablets of various formulations were evaluated for a total mucoadhesion time, buoyancy lag time and percentage drug released. The formulation with xanthan gum showed better results. Thus, it may be useful for prolonged drug release in stomach to improve the bioavailability and reduced dosing frequency. Non-fickians release transport was confirmed as the drug release mechanism from the optimized formulation by Korsmeyer-Peppas. The optimized formulation (B3) showed a mucoadhesive strength >35 g. In vivo study was performed using rabbits by X-ray imaging technique. Radiological evidences suggest that, a formulated tablet was well adhered for >10 h in rabbit's stomach. Optimized lafutidine mucoadhesive tablets showed no significant change in physical appearance, drug content, mucoadhesive properties and in vitro dissolution pattern after storage at 40 °C temperature 75 ± 5% relative humidity for 3 months.
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Affiliation(s)
- Satish Patil
- Alkem Research Centre , Mumbai, Maharashtra , India and
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100
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Huang J, Li W, Li Y, Luo C, Zeng Y, Xu Y, Zhou J. Generation of uniform polymer eccentric and core-centered hollow microcapsules for ultrasound-regulated drug release. J Mater Chem B 2014; 2:6848-6854. [DOI: 10.1039/c4tb01050g] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Uniform polydimethylsiloxane microcapsules with eccentric and core-centered internal hollow structures show controlled-release behaviour for site-specific drug delivery under ultrasound regulation.
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Affiliation(s)
- Jingxian Huang
- Biomedical Engineering Department
- School of Engineering
- Sun Yat-sen University
- Guangzhou 510006, China
| | - Wanbo Li
- Biomedical Engineering Department
- School of Engineering
- Sun Yat-sen University
- Guangzhou 510006, China
| | - Yan Li
- Biomedical Engineering Department
- School of Engineering
- Sun Yat-sen University
- Guangzhou 510006, China
| | - Chongdai Luo
- Biomedical Engineering Department
- School of Engineering
- Sun Yat-sen University
- Guangzhou 510006, China
| | - Yecheng Zeng
- School of Pharmaceutical Science
- Sun Yat-sen University
- Guangzhou 510006, China
| | - Yuehong Xu
- School of Pharmaceutical Science
- Sun Yat-sen University
- Guangzhou 510006, China
| | - Jianhua Zhou
- Biomedical Engineering Department
- School of Engineering
- Sun Yat-sen University
- Guangzhou 510006, China
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