Modulation of Drug Crystallization and Molecular Interactions by Additives in Solid Dispersions for Improving Drug Bioavailability

2019 ◽  
Vol 25 (18) ◽  
pp. 2099-2107 ◽  
Author(s):  
Phuong H.L. Tran ◽  
Wei Duan ◽  
Beom-Jin Lee ◽  
Thao T.D. Tran
Keyword(s):  
Solid Dispersion ◽  
Solid Dispersions ◽  
Water Soluble ◽  
Drug Dissolution ◽  
Drug Bioavailability ◽  
Poorly Water Soluble Drugs ◽  
Water Soluble Drugs ◽  
Potential Applications ◽  
Poorly Water Soluble ◽  
The Right

Background:: An increase in poorly water-soluble drugs makes the design of drug delivery systems challenging. Methods:: Currently, a number of prospective solid dispersions have been investigated with potential applications for delivering a variety of poorly water-soluble drugs. A number of traditional solid dispersions and modifiedsolid dispersions offer attractive advantages in the fabrication, design and development of those drugs for effective therapeutics. Results:: Although traditional solid dispersions can produce a higher release rate, resulting in higher bioavailability compared to conventional dosage forms, this method is not always a promising approach. Modified-solid dispersion has demonstrated both the ability of its polymers to transform drug crystals into amorphous forms and molecular interactivity, thereby improving drug dissolution rate and bioavailability, especially with tough drugs. However, the classification of modified-solid dispersion, which guides the selection of the right strategy in solid dispersion preparation, remains ill-defined. Conclusions:: This review focused on effective strategies in using additives in solid dispersion for improving drug bioavailability.

scholarly journals Insoluble Polymers in Solid Dispersions for Improving Bioavailability of Poorly Water-Soluble Drugs

Polymers ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 1679
Author(s):  
Thao T.D. Tran ◽  
Phuong H.L. Tran
Keyword(s):  
Solid Dispersion ◽  
Solid Dispersions ◽  
Water Soluble ◽  
Dissolution Enhancement ◽  
Formulation Development ◽  
Poorly Water Soluble Drugs ◽  
Water Soluble Drugs ◽  
Poorly Water Soluble ◽  
Insoluble Polymers

In recent decades, solid dispersions have been demonstrated as an effective approach for improving the bioavailability of poorly water-soluble drugs, as have solid dispersion techniques that include the application of nanotechnology. Many studies have reported on the ability to change drug crystallinity and molecular interactions to enhance the dissolution rate of solid dispersions using hydrophilic carriers. However, numerous studies have indicated that insoluble carriers are also promising excipients in solid dispersions. In this report, an overview of solid dispersion strategies involving insoluble carriers has been provided. In addition to the role of solubility and dissolution enhancement, the perspectives of the use of these polymers in controlled release solid dispersions have been classified and discussed. Moreover, the compatibility between methods and carriers and between drug and carrier is mentioned. In general, this report on solid dispersions using insoluble carriers could provide a specific approach and/or a selection of these polymers for further formulation development and clinical applications.

scholarly journals NOVEL APPLICATION OF MIXED HYDROTROPIC SOLUBILIZATION TECHNIQUE IN THE FORMULATION AND EVALUATION OF SOLID DISPERSION OF FLUPIRTINE MALEATE

2018 ◽  
Vol 8 (5) ◽  
pp. 481-488
Author(s):  
Nisha Kumari Yadav ◽  
Tripti Shukla ◽  
Neeraj Upmanyu ◽  
Sharad Prakash Pandey ◽  
Mohammad Azaz Khan
Keyword(s):  
Particle Size ◽  
Solid Dispersion ◽  
Sodium Benzoate ◽  
Oral Bioavailability ◽  
Solid Dispersions ◽  
Water Soluble ◽  
Poorly Water Soluble Drugs ◽  
Water Soluble Drugs ◽  
Evaporation Technique ◽  
Poorly Water Soluble

Flupirtine is an amino pyridine derivative that functions as a centrally acting non-opioid, non-steroidal analgesic. It is a selective neuronal potassium channel opener that also has NMDA receptor antagonist properties. Its muscle relaxant properties make it popular for back pain and other orthopedics uses. In the present investigation, recently developed mixed hydrotropic solid dispersion technology precludes the use of organic solvent and also decreases the individual concentration of hydrotropic agents, simultaneously decreasing their toxic potential. Mixed-hydrotropic solubilisation technique is the experience to increase the solubility of poorly water soluble drugs in the aqueous solution containing blends of hydrotropic agents, which may give synergistic enhancement effect on solubility of poorly water-soluble drugs and to reduce concentrations of each individual hydrotropic agent to minimize their toxic effects due to high concentration of hydrotropic agents. The Flupirtine loaded solid dispersion was prepared by a solvent evaporation technique using sodium benzoate and a niacinamide hydrotropic mixture. The prepared solid dispersions were valuated regarding their solubility, mean particle size, in-vitro drug release. The prepared solid dispersions were found very stable (chemically). The superior dissolution rate due to its reduced particle size may have contributed to the increased oral bioavailability. This study demonstrated that mixed-solvency may be an alternative approach for poorly soluble drugs to improve their solubility and oral bioavailability. Keywords: Flupirtine, Solid dispersion, Mixed-hydrotropic solubilisation, Solvent evaporation technique, Sodium benzoate, Niacinamide

Surface Solid Dispersion – A Review

2013 ◽  
Vol 6 (1) ◽  
pp. 1915-1925
Author(s):  
Sadhna Khatry ◽  
Neha Sood ◽  
Sandeep Arora
Keyword(s):  
Dissolution Rate ◽  
Solid Dispersion ◽  
Solid Dispersions ◽  
High Surface ◽  
High Surface Area ◽  
Water Soluble ◽  
Poorly Water Soluble Drugs ◽  
Water Soluble Drugs ◽  
Insoluble Drugs ◽  
Poorly Water Soluble

Preparation of an effective formulation of poorly water-soluble drugs is a key challenge in pharmaceutical technology. Dissolution rate and solubility are the rate- limiting steps for increasing the bioavailability of poorly water‐soluble drugs. Solid dispersion is an efficient technique for improving dissolution rate and subsequently, the bioavailability of poorly water‐soluble drugs. Surface sSolid dDispersion is a novel technique of solid dispersion for dispersing one or more active ingredients on a water insoluble carrier of high surface area in order to achieve increased dissolution rates and bioavailability of insoluble drugs. The Vvarious polymers used in this technique are Avicel, Crosspovidone, sSodium starch glycolate, pPregelatinized starch, Cab-o-sil, Ac-di-sol, KyronT-314, Primojel and pPotato sStarch. This article reviews the various methods of preparation and characterization of surface solid dispersion and compiles some of the drugs formulated as surface solid dispersions. Some of the practical aspects to be considered for preparing surface solid dispersion are selection of a suitable carrier and method of preparation of surface solid dispersion.

Nano-sized Solid Dispersions for Improving the Bioavailability of Poorly Water-soluble Drugs

2020 ◽  
Vol 26 (38) ◽  
pp. 4917-4924
Author(s):  
Phuong H.L. Tran ◽  
Thao T.D. Tran
Keyword(s):  
Release Rate ◽  
Solid Dispersions ◽  
Amorphous State ◽  
Water Soluble ◽  
Drug Bioavailability ◽  
Poorly Water Soluble Drugs ◽  
High Drug ◽  
Water Soluble Drugs ◽  
Poorly Water Soluble

It has been well established that solid dispersions have a high potential to increase the release rate of poorly water-soluble drugs, resulting in high drug bioavailability. Solid dispersions have been vigorously investigated with various practical approaches in recent decades. Improvements in wettability, molecular interactions and drugs being held in an amorphous state in solid dispersions are the main mechanisms underlying the high drug release rate. Moreover, the synergistic effect of incorporating nanotechnology in solid dispersions is expected to lead to an advanced drug delivery system for poorly water-soluble drugs. However, to date, there is still a lack of reviews providing outlooks on the nano-sized solid dispersions that have been substantially investigated for improving the bioavailability of poorly water-soluble drugs. In the current review, we aim to overview key advantages and approaches for producing nano-sized solid dispersions. The classification of key strategies in developing nano-sized solid dispersions will advance the creation of even more efficient solid dispersions, which will translate into clinical studies.

It is Possible to Achieve Tablets with Good Tabletability from Solid Dispersions – the Case of the High Dose Drug Gemfibrozil

2020 ◽  
Vol 17 ◽  
Author(s):  
Eduarda Rocha Bigogno ◽  
Luciano Soares ◽  
Matheus Henrique Ruela Mews ◽  
Melissa Zétola ◽  
Giovana Carolina Bazzo ◽  
...  
Keyword(s):  
Drug Release ◽  
Dissolution Rate ◽  
Solid Dispersions ◽  
Water Soluble ◽  
Drug Dissolution ◽  
Dissolution Enhancement ◽  
Poorly Water Soluble Drugs ◽  
Water Soluble Drugs ◽  
Croscarmellose Sodium ◽  
Poorly Water Soluble

Background: Solid dispersions (SDs) have been extensively used to increase dissolution of poorly water-soluble drugs. However, there are few studies exploring SDs properties that must be considered during tablet development, like tabletability. Poorly water-soluble drugs with poor compression properties and high therapeutic doses, like gemfibrozil, are an additional challenge in the production of SDs-based tablets. Objective: This study evaluates the applicability of SDs to improve both tabletability and dissolution rate of gemfibrozil. A SD-based tablet formulation was also proposed. Method: SDs were prepared by ball milling, using hydroxypropyl methylcellulose (HPMC) as carrier, according to a 23 factorial design. The formulation variables were: gemfibrozil:HPMC ratio, milling speed, and milling time. The response in the factorial analysis was the tensile strength of the compacted SDs. Dissolution rate and solid-state characterization of SDs were also performed. Results: SDs showed simultaneous drug dissolution enhancement and improved tabletability when compared to corresponding physical mixtures and gemfibrozil. The main variable influencing drug dissolution and tabletability was the gemfibrozil:HPMC ratio. Tablets containing gemfibrozil-HPMC-SD (1:0.250 w/w) and croscarmellose sodium showed fast and complete drug release while those containing the same SD and sodium starch glycolate exhibited poor drug release due to their prolonged disintegration time. Conclusion: SDs proved to be effective for simultaneously improving tabletability and dissolution profile of gemfibrozil. Tablets containing gemfibrozil-HPMC-SD and croscarmellose sodium as disintegrating agent showed improved drug release and good mechanical strength, demonstrating the potential of HPMC-based SDs to simultaneously overcome the poor dissolution and tabletability properties of this drug.

scholarly journals Preparation of solid dispersion of rutin by spay drying

2019 ◽  
Vol 35 (2) ◽  
Author(s):  
Nguyen Van Khanh ◽  
Ta Thi Thu ◽  
Hoang Anh Tuan
Keyword(s):  
Spray Drying ◽  
Solid Dispersion ◽  
Flow Rate ◽  
Solid Dispersions ◽  
Tween 80 ◽  
Water Soluble ◽  
Poorly Water Soluble Drugs ◽  
Water Soluble Drugs ◽  
Poorly Water Soluble ◽  
Pvp K30

Abstract: The poor solubility of rutin leads to poor bioavailability. The present study is aimed to increase the solubility and bioavailability of rutin using solid dispersion technique. The solid dispersions of rutin were prepared by spray-dried method using β-CD, HPMC E6, HPMC E15, PVP K30, SLS, poloxamer 188 and Tween 80 as carriers. The interaction of rutin with the carriers was evaluated by using methods such as dissolved measurement, Fourier-transformation infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), and X-ray diffraction (XRD). The optimization of formulation was carried out by using Central Composite Face design. Independent variables include PVP K30/rutin ratio, Tween 80/rutin ratio, inlet air temperature, and feed flow rate. Dependent variables are the dissolution and product yield. The optimized preparation conditions for rutin solid dispersions were obtained as PVP K30: rutin at a ratio of 5.77, Tween 80: rutin at a ratio of 0.14, inlet temperature of 110.05, flow rate of 1370.9 ml per hour. The results of this study indicate that the solid dispersion of rutin increases significantly the dissolution of rutin in comparison with rutin. The results of the DSC and XRD studies prove the state transition of rutin from crystalline to amorphous. Keywords Rutin, solid dispersion, spray drying, PVP K30, dissolution. References [1] Beatriz Gullón, Thelmo A. Lú-Chau, María Teresa Moreira, Juan M. Lema, Gemman Eibes, Rutin: A review on extraction, identification and purification methods, biological activities and approaches to enhance its bioavailability, Trends in Food Science & Technology 67 (2017) 220-235. https://doi.org/10.1016/j.tifs.2017.07.008.[2] Carla Aparecida Pedriali, Adjaci Uchoa Fernandes, Leandra de Cássia Bernusso, Bronislaw Polakiewicz, The synthesis of a water-soluble derivative of rutin as an antiradical agent, Química Nova 31(8) (2008) 2147-2151. http://dx.doi.org/10.1590/S0100-40422008000800039.[3] Chiou, Win Loung, Riegelman, Sidney, Pharmaceutical applications of solid dispersion systems, Journal of pharmaceutical sciences 60(9) (1971) 1281-1302. https://doi.org/10.1002/jps.2600600902.[4] Xingwang Zhang, Huijie Xing,Yue Zhao, Zhiguo Ma, Pharmaceutical Dispersion Techniques for Dissolution and Bioavailability Enhancement of Poorly Water-Soluble Drugs, Pharmaceutics 10(3) (2018) 1-33. https://doi.org/10.3390/pharmaceutics10030074.[5] Ladan Akbarpour Nikghalb, Gurinder Singh, Gaurav Singh, Kimia Fazaeli Kahkeshan, Solid Dispersion: Methods and Polymers to increase the solubility of poorly soluble drugs, Journal of Applied Pharmaceutical Science 2(10) (2012) 170-175. https://doi.org/10.7324/JAPS.2012.2103.[6] Amrit Paudel, Zelalem Ayenew Worku, Joke Meeus, Sandra Guns, Guy Van den Mooter, Manufacturing of solid dispersions of poorly water soluble drugs by spray drying: formulation and process considerations, International Journal of Pharmaceutics 453(1) (2013) 253-284. https://doi.org/10.1016/j.ijpharm.2012.07.015.[7] P.B. Dalvi, A.B. Gerange, R. IngaleP, Solid dispersion: strategy to enhance solubility, Journal of Drug Delivery & Therapeutics 5(2) (2015) 20-28. https://doi.org/10.22270/jddt.v5i2.1060.[8] Chau Le Ngoc Vo, Chulhun Park, Beom Jin Lee, Current trends and future perspectives of solid dispersions containing poorly water-soluble drugs. European Journal of Pharmaceutics and Biopharmaceutics 85(3) (2013) 799-813. https://doi.org/10.1016/j.ejpb.2013.09.007.[9] I.V. Koval’skii, I.I. Krasnyuk, I.I. Krasnyuk, O.I. Nikulina, A.V. Belyatskaya, Yu. Ya. Kharitonov, N.B. Fel’dman, S.V. Lutsenko, V.V. Grikh, Studies of the Solubility of Rutin from Solid Dispersions, Pharmaceutical Chemistry Journal 47(11) (2014) 612-615. https://doi.org/10.1007/s11094-014-1020-z.  

scholarly journals SOLID DISPERSION - A NOVEL APPROACH FOR BIOAVAILABILITY ENHANCEMENT OF POORLY WATER-SOLUBLE DRUGS IN SOLID ORAL DOSAGE FORMS

2019 ◽  
pp. 17-26
Author(s):  
PURNACHANDRA REDDY GUNTAKA ◽  
SRINIVAS LANKALAPALLI
Keyword(s):  
Solid Dispersion ◽  
Solid Dispersions ◽  
Water Soluble ◽  
Oral Dosage ◽  
Bioavailability Enhancement ◽  
Poorly Water Soluble Drugs ◽  
Novel Approach ◽  
New Chemical Entities ◽  
Water Soluble Drugs ◽  
Poorly Water Soluble

Enhancement of the bioavailability of poorly water-soluble drugs is a challenging task in drug development. Currently 40% of new chemical entities are discovered as poorly water-soluble drugs. Solid dispersion is one of the best technology for improving solubility, dissolution rate, and bioavailability. Solid dispersion techniques are more useful for enhancing drug solubility for a combination of drug and inert carrier to improve wettability, reduced particle size, and converting amorphous particles. This article reviews various advantages, methods of solid dispersions, carriers used in solid dispersion, characterization, and marketed products.

Fast-dissolving Solid Dispersions for the Controlled Release of Poorly Water-soluble Drugs

2020 ◽  
Vol 26 ◽  
Author(s):  
Phuong H.L. Tran ◽  
Beom-Jin Lee ◽  
Thao T.D. Tran
Keyword(s):  
Drug Delivery ◽  
Controlled Release ◽  
Oral Drug Delivery ◽  
Solid Dispersions ◽  
Water Soluble ◽  
Drug Dissolution ◽  
Oral Drug ◽  
Poorly Water Soluble Drugs ◽  
Water Soluble Drugs ◽  
Poorly Water Soluble

: Solid dispersions offer many advantages for oral drug delivery of poorly water-soluble drugs over other systems, including an increase in drug solubility and drug dissolution. The improvement of drug absorption and higher bioavailability of active pharmaceutical ingredients in the gastrointestinal tract have been reported in various studies. In certain circumstances, a rapid pharmacological effect is required for patients. Fast-dissolving solid dispersions provide an ideal formulation in such cases. This report will provide an overview of current studies on fast-dissolving solid dispersions, including not only solid dispersion powders with fast dissolution rates but also specific does forms for the controlled release of poorly water-soluble drugs. Specifically, the applications of fast-dissolving solid dispersions will be described in every specific case. Moreover, pharmaceutical approaches and the utilization of polymers will be summarized. The classification and analysis of fast-dissolving solid dispersions could provide insight into strategies and potential applications in future drug delivery developments.

scholarly journals Spray Congealing: An Emerging Technology to Prepare Solid Dispersions with Enhanced Oral Bioavailability of Poorly Water Soluble Drugs

Molecules ◽  
2019 ◽  
Vol 24 (19) ◽  
pp. 3471 ◽  
Author(s):  
Serena Bertoni ◽  
Beatrice Albertini ◽  
Nadia Passerini
Keyword(s):  
Oral Bioavailability ◽  
Solid Dispersions ◽  
Emerging Technology ◽  
Water Soluble ◽  
Oral Drug ◽  
Dissolution Enhancement ◽  
Drug Bioavailability ◽  
Poorly Water Soluble Drugs ◽  
Water Soluble Drugs ◽  
Poorly Water Soluble

The low and variable oral bioavailability of poorly water soluble drugs remains a major concern for the pharmaceutical industry. Spray congealing is an emerging technology for the production of solid dispersion to enhance the bioavailability of poorly soluble drugs by using low-melting hydrophilic excipients. The main advantages are the absence of solvents and the possibility to obtain spherical free-flowing microparticles (MPs) by a relatively inexpensive, simple, and one-step process. This review aims to fully describe the composition, structure, physico-chemical properties, and characterization techniques of spray congealed-formulations. Moreover, the influence of these properties on the MPs performance in terms of solubility and dissolution enhancement are examined. Following, an overview of the different spray congealed systems developed to increase the oral drug bioavailability is provided, with a focus on the mechanisms underpinning the bioavailability enhancement. Finally, this work gives specific insights on the main factors to be considered for the rational formulation, manufacturing, and characterization of spray congealed solid dispersions.

ENHANCED DISSOLUTION OF A POORLY WATER-SOLUBLE DRUG BY SOLID DISPERSIONS (SOLVENT EVAPORATION) TECHNIQUE

INDIAN DRUGS ◽  
2013 ◽  
Vol 50 (06) ◽  
pp. 13-19
Author(s):  
R. O Sonawane ◽  
◽  
S. Nayak ◽  
M. D. Chaudhari ◽  
V. V. Pande
Keyword(s):  
Solid Dispersion ◽  
Solid Dispersions ◽  
Solvent Evaporation ◽  
Water Soluble ◽  
Differential Scanning Calorimetric ◽  
Maximum Enhancement ◽  
Enhanced Dissolution ◽  
Water Soluble Drugs ◽  
Fusion Methods ◽  
Poorly Water Soluble

The poorly water soluble drugs tend to have low bioavailability and this can be improved by several methods. Solid dispersion is a promising formulation approach to improve solubility and dissolution and ultimately oral bioavailability of these drugs. The aim of this study was to prepare and characterize solid dispersion of anti-diabetic glimepiride, a BCS class II drug, with the hydrophilic carrier PVP K30 by solvent evaporation and microwave induced fusion methods. Scanning electron microscopy (SEM), X–ray powder diffractometry (XRD) and differential scanning calorimetric (DSC) were used to evaluate the physical state of the drug. The solid dispersions were also evaluated for drug content, solubility and dissolution studies. Solid dispersions prepared by solvent evaporation method were showed maximum enhancement of solubility and dissolution in comparison to that prepared by other method.

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