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Jin C, Wu F, Hong Y, Shen L, Lin X, Zhao L, Feng Y. Updates on applications of low-viscosity grade Hydroxypropyl methylcellulose in coprocessing for improvement of physical properties of pharmaceutical powders. Carbohydr Polym 2023; 311:120731. [PMID: 37028868 DOI: 10.1016/j.carbpol.2023.120731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2022] [Revised: 02/05/2023] [Accepted: 02/17/2023] [Indexed: 03/03/2023]
Abstract
Hydroxypropyl methylcellulose (HPMC) is an important polymeric excipient. Its versatility in terms of molecular weights and viscosity grades is the basis for its wide and successful application in the pharmaceutical industry. Low viscosity grades of HPMC (like E3 and E5) have been used as physical modifiers for pharmaceutical powders in recent years due to their unique physicochemical and biological properties (e.g., low surface tension, high Tg, strong hydrogen bonding ability, etc.). Such modification is the co-processing of HPMC with a drug/excipient to create composite particles (CPs) for the purpose of providing synergistic effects of functional improvement as well as of masking undesirable properties of the powder (e.g., flowability, compressibility, compactibility, solubility, stability, etc.). Therefore, given its irreplaceability and tremendous opportunities for future developments, this review summarized and updated studies on improving the functional properties of drugs and/or excipients by forming CPs with low-viscosity HPMC, analyzed and exploited the improvement mechanisms (e.g., improved surface properties, increased polarity, hydrogen bonding, etc.) for the further development of novel co-processed pharmaceutical powders containing HPMC. It also provides an outlook on the future applications of HPMC, aiming to provide a reference on the crucial role of HPMC in various areas for interested readers.
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Ouyang H, Ang SJ, Lee ZY, Hiew TN, Heng PWS, Chan LW. Effect of drug load and lipid-wax blends on drug release and stability from spray-congealed microparticles. Pharm Dev Technol 2022; 27:1069-1082. [PMID: 36422997 DOI: 10.1080/10837450.2022.2152048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
This study was designed to evaluate paraffin wax as a potential controlled release matrix for spray congealing and its impact on drug release and stability of the microparticles. Paraffin wax can form a hydrophobic barrier to moisture and reduce drug degradation besides retarding drug release in the gastrointestinal tract. More hydrophilic lipid-based additives can be incorporated to modulate the drug release through the paraffin wax barrier. This study reports the findings of lipid-wax formulations at preserving the stability of moisture-sensitive drugs in spray-congealed microparticles. Aspirin-loaded microparticles formulated with different drug loads, lipid additives, and lipid:wax ratios were produced by spray congealing. Stearic acid (SA), cetyl alcohol (CA), and cetyl ester (CE) were the lipid additives studied. The microparticles were evaluated for yield, encapsulation efficiency, particle size, drug stability, and release. CE exhibited the greatest effect on increasing drug release, followed by CA and SA. Dissolution profiles showed the best fit to Weibull kinetic model. The degree of drug degradation was low, with CA imparting the least protective effect, followed by SA and CE. Paraffin wax is useful for preserving the stability of moisture-sensitive aspirin and retarding its release from spray-congealed microparticles. The addition of lipid additives modulated drug release without compromising drug stability.
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Affiliation(s)
- Hongyi Ouyang
- GEA-NUS Pharmaceutical Processing Research Laboratory, Department of Pharmacy, National University of Singapore, Singapore, Singapore
| | - Soon Jun Ang
- GEA-NUS Pharmaceutical Processing Research Laboratory, Department of Pharmacy, National University of Singapore, Singapore, Singapore
| | - Zong Yang Lee
- GEA-NUS Pharmaceutical Processing Research Laboratory, Department of Pharmacy, National University of Singapore, Singapore, Singapore
| | - Tze Ning Hiew
- GEA-NUS Pharmaceutical Processing Research Laboratory, Department of Pharmacy, National University of Singapore, Singapore, Singapore
| | - Paul Wan Sia Heng
- GEA-NUS Pharmaceutical Processing Research Laboratory, Department of Pharmacy, National University of Singapore, Singapore, Singapore
| | - Lai Wah Chan
- GEA-NUS Pharmaceutical Processing Research Laboratory, Department of Pharmacy, National University of Singapore, Singapore, Singapore
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da Rocha NP, Barbosa EJ, Barros de Araujo GL, Bou-Chacra NA. Innovative drug delivery systems for leprosy treatment. Indian J Dermatol Venereol Leprol 2022; 88:1-6. [PMID: 35434984 DOI: 10.25259/ijdvl_1119_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Accepted: 01/01/2022] [Indexed: 11/04/2022]
Affiliation(s)
- Nataly Paredes da Rocha
- Faculty of Pharmaceutical Sciences, University of São Paulo, Prof. Lineu Prestes Avenue, São Paulo, SP, Brazil
| | - Eduardo José Barbosa
- Faculty of Pharmaceutical Sciences, University of São Paulo, Prof. Lineu Prestes Avenue, São Paulo, SP, Brazil
| | | | - Nádia Araci Bou-Chacra
- Faculty of Pharmaceutical Sciences, University of São Paulo, Prof. Lineu Prestes Avenue, São Paulo, SP, Brazil
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Adami LE, Freitas OD, Figueiredo FATD, Ferreira MP, Macedo AP, Couto ROD, Pedrazzi V. Needle-free anesthesia: clinical efficacy of a mucoadhesive patch for atraumatic anesthesia in dental procedures. Braz Oral Res 2021; 35:e131. [PMID: 34932660 DOI: 10.1590/1807-3107bor-2021.vol35.0131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 06/02/2021] [Indexed: 11/22/2022] Open
Abstract
This study showcases the clinical efficacy of mucoadhesive patches designed for the buccal delivery of lidocaine and prilocaine hydrochlorides (1:1, 30 mg/patch). Such patches were developed for needle-free pre-operative local anesthesia in dentistry, aiming at mitigating the use of infiltrative anesthesia for medium-complexity clinical procedures. The patches were manufactured encompassing drug-release, mucoadhesive and backing layers, all prepared through film casting using biocompatible materials. Fifty-eight (n = 58) adult patients (65% women and 35% men) were randomly selected and included in a one-arm open clinical prospective cohort study. The average age of the subjects was of 50 years. The majority (59%) of the subjects, mostly women (82%), reported needle-phobia or anxiety due to dental procedures, which was assessed through a questionnaire approved by the ethical council for human use in research. The patches were positioned in the gingival region of the teeth involved in the procedure (86% on the maxillary and 14% on the mandibular bone). Two anesthetic patches were applied on each patient: one in the vestibular region and another in the palate/lingual portion, and these patches remained attached to the placement sites throughout the procedures. Concerning the dental procedures performed, 40% were cavity preparations and dental restorations of medium cavities; 29% staple facilities; 10% gingival retractions; 9% subgingival scrapings; 3% gingivalplasties; 3% supragingival preparations; 3% occlusal adjustments; and 2% subgingival preparations. In 90% of the cases, it was not necessary to complement with conventional infiltrative local anesthesia during the procedures. Patients did not report any discomfort or side effect during or after the administration of the patches. Among the cases in which there was the need for complementation, 50% were cavity preparations and dental restorations; 33% supragingival preparations; and 17% gingivoplasties. The complementary anesthesia volume was of 0.63 ± 0.23 mL and women corresponded to 83% of the participants who needed such intervention. Furthermore, in most cases, the patch was capable of initiating the anesthesia within a short time frame (5 minutes) and reaching the maximum anesthetic effect within 15 and 25 min, lasting at least 50 min. Undesirable side effects were not reported either 2 h after the administration or within the 6-month follow-up. Therefore, the anesthetic patches developed provide needle-free, painless, safe, and patient/dentist-friendly advances in performing routine medium-complexity dental procedures.
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Affiliation(s)
- Larisse Eduardo Adami
- Universidade de São Paulo - USP, School of Dentistry of Ribeirao Preto, Department of Dental Materials and Prosthodontics, Ribeirão Preto, SP, Brazil
| | - Osvaldo de Freitas
- Universidade de São Paulo - USP, School of Pharmaceutical Sciences of Ribeirao Preto, Department of Pharmaceutical Sciences, Ribeirão Preto, SP, Brazil
| | | | - Maíra Peres Ferreira
- Universidade de São Paulo - USP, School of Pharmaceutical Sciences of Ribeirao Preto, Department of Pharmaceutical Sciences, Ribeirão Preto, SP, Brazil
| | - Ana Paula Macedo
- Universidade de São Paulo - USP, School of Dentistry of Ribeirao Preto, Department of Dental Materials and Prosthodontics, Ribeirão Preto, SP, Brazil
| | - Renê Oliveira do Couto
- Universidade Federal de São João del-Rei - UFSJ, "Dona Lindu" Midwest Campus, Divinopolis, MG, Brazil
| | - Vinicius Pedrazzi
- Universidade de São Paulo - USP, School of Dentistry of Ribeirao Preto, Department of Dental Materials and Prosthodontics, Ribeirão Preto, SP, Brazil
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Strenzke G, Dürr R, Bück A, Tsotsas E. Influence of operating parameters on process behavior and product quality in continuous spray fluidized bed agglomeration. POWDER TECHNOL 2020. [DOI: 10.1016/j.powtec.2020.07.083] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Bertoni S, Albertini B, Passerini N. Spray Congealing: An Emerging Technology to Prepare Solid Dispersions with Enhanced Oral Bioavailability of Poorly Water Soluble Drugs. Molecules 2019; 24:E3471. [PMID: 31557815 PMCID: PMC6804277 DOI: 10.3390/molecules24193471] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Revised: 09/23/2019] [Accepted: 09/24/2019] [Indexed: 12/17/2022] Open
Abstract
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.
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Affiliation(s)
- Serena Bertoni
- Department of Pharmacy and BioTechnology, University of Bologna, Via S. Donato 19/2, 40127 Bologna, Italy.
| | - Beatrice Albertini
- Department of Pharmacy and BioTechnology, University of Bologna, Via S. Donato 19/2, 40127 Bologna, Italy.
| | - Nadia Passerini
- Department of Pharmacy and BioTechnology, University of Bologna, Via S. Donato 19/2, 40127 Bologna, Italy.
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Abstract
Spray congealing is a low cost, simple and versatile method to produce microparticles without the use of organic or aqueous solvent. This review provides a detailed picture of the pharmaceutical applications of this technology, with an overview of the spray-congealed-based drug-delivery systems. First, the basic principles and equipment of spray congealing technology are presented. Then, representative examples of the drug-delivery systems are examined and critically discussed. Emphasis is given on the role of formulation variables, together with practical considerations for formulation design. In addition, the current status of the industrial applications of this technology within the pharmaceutical field is examined. The final part points out benefits, limitations and future perspectives of this technology in drug delivery.
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Fu J, Yin H, Yu X, Xie C, Jiang H, Jin Y, Sheng F. Combination of 3D printing technologies and compressed tablets for preparation of riboflavin floating tablet-in-device (TiD) systems. Int J Pharm 2018; 549:370-379. [PMID: 30107218 DOI: 10.1016/j.ijpharm.2018.08.011] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2018] [Revised: 08/06/2018] [Accepted: 08/08/2018] [Indexed: 10/28/2022]
Abstract
Gastric floating tablets are a multifunctional dosage form with the merits of long-term gastric retention, sustained release and improved bioavailability though floating time and sustained release are usually not satisfied. Here we designed a novel gastric floating system by combining compressed tablets with 3D printed devices, wherein a riboflavin tablet was filled into a device. The table-filled device can be called a tablet-in-device (TiD) system. Commercial poly(lactic acid) filaments were used for fused deposition modeling (FDM) 3D printing of the body and cap of the device. Four types of TiD systems were prepared. The basic structures of them involved non-net, centrally symmetric double-net (including a peripheral sealed air-filled chamber and a centric net-on-both-sides chamber), single-net (including a sealed air-filled chamber on the top side and a net-on-one-side chamber on the bottom side), and eccentric double-net (including an eccentric net-on-both-sides chamber and an air-filled chamber). They were exquisitely designed after precise calculations of every chamber parameters according to the buoyant principle. All of them showed good floating ability, although only the latter two TiD systems were selected due to appropriate drug release. Compressed riboflavin tablets, consisting of riboflavin, lactose, hydroxypropyl methylcellulose (HPMC) and magnesium stearate, were prepared with the direct compaction method. All the tablets showed rapid drug release though the release was highly hindered by the devices in the TiD systems due to the barrier effect of devices and the tablet slurry formation. The single-net and double-net TiD systems achieved the cumulative release of 41% and 62% at 72 h, respectively, along with simultaneously well floating. In vivo long-term (>72 h) gastric floating function of TiD systems was further demonstrated on the rabbit models by the CT investigation. TiD systems are appropriate for oral administration of drugs with super long-term floating and controlled release in the gastric route.
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Affiliation(s)
- Junhui Fu
- Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, 27 Taiping Road, Beijing 100850, China; Pharmaceutical College of Henan University, Kaifeng 475004, China
| | - Hui Yin
- Department of Radiology, 307 Hospital, PLA, 8 East Street, Beijing 100071, China; Department of Radiology, Clinical College of 307th Hospital of PLA, Anhui Medical University, Beijing 10071, China
| | - Xiang Yu
- Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, 27 Taiping Road, Beijing 100850, China; School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, China
| | - Cong Xie
- Department of Radiology, 307 Hospital, PLA, 8 East Street, Beijing 100071, China
| | - Heliu Jiang
- Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, 27 Taiping Road, Beijing 100850, China
| | - Yiguang Jin
- Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, 27 Taiping Road, Beijing 100850, China; Pharmaceutical College of Henan University, Kaifeng 475004, China; School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, China.
| | - Fugeng Sheng
- Department of Radiology, 307 Hospital, PLA, 8 East Street, Beijing 100071, China; Department of Radiology, Clinical College of 307th Hospital of PLA, Anhui Medical University, Beijing 10071, China.
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Ouyang H, Zheng AY, Heng PWS, Chan LW. Effect of Lipid Additives and Drug on the Rheological Properties of Molten Paraffin Wax, Degree of Surface Drug Coating, and Drug Release in Spray-Congealed Microparticles. Pharmaceutics 2018; 10:E75. [PMID: 29949920 PMCID: PMC6160941 DOI: 10.3390/pharmaceutics10030075] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 06/19/2018] [Accepted: 06/20/2018] [Indexed: 11/17/2022] Open
Abstract
Paraffin wax is potentially useful for producing spray-congealed drug-loaded microparticles with sustained-release and taste-masking properties. To date, there is little information about the effects of blending lipids with paraffin wax on the melt viscosity. In addition, drug particles may not be entirely coated by the paraffin wax matrix. In this study, drug-loaded paraffin wax microparticles were produced by spray-congealing, and the effects of lipid additives on the microparticle production were investigated. The influence of lipid additives (stearic acid, cetyl alcohol, or cetyl esters) and drug (paracetamol) on the rheological properties of paraffin wax were elucidated. Fourier transform-infrared spectroscopy was conducted to investigate the interactions between the blend constituents. Selected formulations were spray-congealed, and the microparticles produced were characterized for their size, drug content, degree of surface drug coating, and drug release. The viscosity of wax-lipid blends was found to be mostly lower than the weighted viscosity when interactions occurred between the blend constituents. Molten paraffin wax exhibited Newtonian flow, which was transformed to plastic flow by paracetamol and pseudoplastic flow by the lipid additive. The viscosity was decreased with lipid added. Compared to plain wax, wax-lipid blends produced smaller spray-congealed microparticles. Drug content remained high. Degree of surface drug coating and drug release were also higher. The lipid additives altered the rheological properties and hydrophobicity of the melt and are useful for modifying the microparticle properties.
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Affiliation(s)
- Hongyi Ouyang
- GEA-NUS Pharmaceutical Processing Research Laboratory, Department of Pharmacy, National University of Singapore, 18 Science Drive 4, Singapore 117543, Singapore.
| | - Audrey Yi Zheng
- GEA-NUS Pharmaceutical Processing Research Laboratory, Department of Pharmacy, National University of Singapore, 18 Science Drive 4, Singapore 117543, Singapore.
| | - Paul Wan Sia Heng
- GEA-NUS Pharmaceutical Processing Research Laboratory, Department of Pharmacy, National University of Singapore, 18 Science Drive 4, Singapore 117543, Singapore.
| | - Lai Wah Chan
- GEA-NUS Pharmaceutical Processing Research Laboratory, Department of Pharmacy, National University of Singapore, 18 Science Drive 4, Singapore 117543, Singapore.
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Smyth HDC. Recent advances in solid dispersions and the formulation of poorly absorbed drugs. Drug Dev Ind Pharm 2016; 42:351-2. [DOI: 10.3109/03639045.2016.1147716] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Hugh D. C. Smyth
- Division of Pharmaceutics, College of Pharmacy, University of Texas at Austin, Austin, TX, USA
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