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Wang Z, Cui X, Famulari A, Martí-Rujas J, Kariuki BM, Guo F. Solid-state stability of Z′ < 1 and Z′ = 2 polymorphs of N, N, N′, N′-tetrabenzylethylenediamine: a combined experimental and theoretical study. CrystEngComm 2022. [DOI: 10.1039/d2ce01174c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reported polymorphism in a highly flexible ligand gives a structure that is considered as a “crystal on the way” belonging to a metastable phase.
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Affiliation(s)
- Zhen Wang
- College of Chemistry, Liaoning University, Shenyang 110036, China
| | - Xiaoxiao Cui
- College of Chemistry, Liaoning University, Shenyang 110036, China
| | - Antonino Famulari
- Dipartimento di Chimica Materiali e Ingegneria Chimica. “Giulio Natta”, Politecnico di Milano, Via L. Mancinelli 7, 20131 Milan, Italy
- INSTM Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali, 50121, Florence, Italy
| | - Javier Martí-Rujas
- Dipartimento di Chimica Materiali e Ingegneria Chimica. “Giulio Natta”, Politecnico di Milano, Via L. Mancinelli 7, 20131 Milan, Italy
- Center for Nano Science and Technology@Polimi, Istituto Italiano di Tecnologia, Via Pascoli 70/3, 20133 Milano, Italy
| | - Benson M. Kariuki
- School of chemistry, Cardiff University, Main Building, Park place, Cardiff CF10 3AT, Wales, UK
| | - Fang Guo
- College of Chemistry, Liaoning University, Shenyang 110036, China
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Wang Z, Han X, Chen R, Li J, Gao J, Zhang H, Liu N, Gao X, Zheng A. Innovative color jet 3D printing of levetiracetam personalized paediatric preparations. Asian J Pharm Sci 2021; 16:374-386. [PMID: 34276825 PMCID: PMC8261256 DOI: 10.1016/j.ajps.2021.02.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2020] [Revised: 01/18/2021] [Accepted: 02/03/2021] [Indexed: 11/27/2022] Open
Abstract
3D printing is a promising technology used in the fabrication of complex oral dosage delivery pharmaceuticals. This study first reports an innovative color jet 3D printing (CJ-3DP) technology to produce colorful cartoon levetiracetam pediatric preparations with high accuracy and reproducibility. For this study, the ideal printing ink consisted of 40% (v/v) isopropanol aqueous solution containing 0.05% (w/w) polyvinylpyrrolidone and 4% (w/w) glycerin, which was satisfied with scale-up of the production. The external and internal spatial structures of the tablets were designed to control the appearance and release, and cartoon tablets with admirable appearances and immediate release characteristics were printed. The dosage model showed a good linear relationship between the model volume and the tablet strength (r > 0.999), which proved the potential of personalized administration. The surface roughness indicated that the appearance of the CJ-3DP tablets was significantly better than the first listed 3D printed drug (SpritamⓇ). Moreover, the scanning electron microscopy and porosity results further showed that the tablets have a structure of loose interior and tight exterior, which could ensure good mechanical properties and rapid dispersion characteristics simultaneously. In conclusion, the innovative CJ-3DP technology can be used to fabricate personalized pediatric preparations for improved compliance. Due to the stable formulation and fabrication process, this technology has the potential in scale-up production.
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Affiliation(s)
- Zengming Wang
- Department of Pharmaceutics, Institute of Pharmacology and Toxicology of Academy of Military Medical Sciences, Beijing 100850, China
| | - Xiaolu Han
- Department of Pharmaceutics, Institute of Pharmacology and Toxicology of Academy of Military Medical Sciences, Beijing 100850, China
| | - Ruxin Chen
- Department of Pharmaceutics, Institute of Pharmacology and Toxicology of Academy of Military Medical Sciences, Beijing 100850, China.,College of Pharmaceutical Sciences, Key Laboratory of Pharmaceutical Quality Control of Hebei Province, Institute of Life Science and Green Development, Hebei University, Baoding 071002, China
| | - Jingru Li
- Department of Pharmaceutics, Institute of Pharmacology and Toxicology of Academy of Military Medical Sciences, Beijing 100850, China.,School of Pharmacy, Xuzhou Medical University, Xuzhou 221000, China
| | - Jing Gao
- Department of Pharmaceutics, Institute of Pharmacology and Toxicology of Academy of Military Medical Sciences, Beijing 100850, China
| | - Hui Zhang
- Department of Pharmaceutics, Institute of Pharmacology and Toxicology of Academy of Military Medical Sciences, Beijing 100850, China
| | - Nan Liu
- Department of Pharmaceutics, Institute of Pharmacology and Toxicology of Academy of Military Medical Sciences, Beijing 100850, China
| | - Xiang Gao
- Department of Pharmaceutics, Institute of Pharmacology and Toxicology of Academy of Military Medical Sciences, Beijing 100850, China
| | - Aiping Zheng
- Department of Pharmaceutics, Institute of Pharmacology and Toxicology of Academy of Military Medical Sciences, Beijing 100850, China
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Bebiano SS, ter Horst JH, Oswald ID. Effect of Chirality on the Compression of 2-(2-Oxo-1-pyrrolidinyl)butyramide: A Tale of Two Crystals. CRYSTAL GROWTH & DESIGN 2020; 20:6731-6744. [PMID: 33071676 PMCID: PMC7552093 DOI: 10.1021/acs.cgd.0c00871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 08/25/2020] [Indexed: 06/11/2023]
Abstract
Understanding polymorphism in chiral systems for drug manufacturing is essential to avoid undesired therapeutic effects. Generally, polymorphism is studied through changes in temperature and solution concentration. A less common approach is the application of pressure. The goal of this work is to investigate the effect of pressure on levetiracetam (pure enantiomer) and etiracetam (racemic compound). Anisotropic compressions of levetiracetam and etiracetam are observed to 5.26 and 6.29 GPa, respectively. The most compressible direction for both was identified to be perpendicular to the layers of the structure. Raman spectroscopy and an analysis of intermolecular interactions suggest subtle phase transitions in levetiracetam (∼2 GPa) and etiracetam (∼1.5 GPa). The stability of etiracetam increases with respect to levetiracetam on compression; hence, the chiral resolution of this system is unfavorable using pressure. This work contributes to the ongoing efforts in understanding the stability of chiral systems.
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Affiliation(s)
- Suse S. Bebiano
- Strathclyde
Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, U.K.
- EPSRC
Centre for Innovative Manufacturing in Continuous Manufacturing and
Crystallisation, Technology Innovation Centre,
University of Strathclyde, 99 George Street, Glasgow G1 1RD, U.K.
| | - Joop H. ter Horst
- Strathclyde
Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, U.K.
- EPSRC
Centre for Innovative Manufacturing in Continuous Manufacturing and
Crystallisation, Technology Innovation Centre,
University of Strathclyde, 99 George Street, Glasgow G1 1RD, U.K.
| | - Iain D.H. Oswald
- Strathclyde
Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, U.K.
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Naiserová M, Kubová K, Vysloužil J, Pavloková S, Vetchý D, Urbanová M, Brus J, Vysloužil J, Kulich P. Investigation of Dissolution Behavior HPMC/Eudragit ®/Magnesium Aluminometasilicate Oral Matrices Based on NMR Solid-State Spectroscopy and Dynamic Characteristics of Gel Layer. AAPS PharmSciTech 2018; 19:681-692. [PMID: 28971441 DOI: 10.1208/s12249-017-0870-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Accepted: 08/24/2017] [Indexed: 12/11/2022] Open
Abstract
Burst drug release is often considered a negative phenomenon resulting in unexpected toxicity or tissue irritation. Optimal release of a highly soluble active pharmaceutical ingredient (API) from hypromellose (HPMC) matrices is technologically impossible; therefore, a combination of polymers is required for burst effect reduction. Promising variant could be seen in combination of HPMC and insoluble Eudragits® as water dispersions. These can be applied only on API/insoluble filler mixture as over-wetting prevention. The main hurdle is a limited water absorption capacity (WAC) of filler. Therefore, the object of this study was to investigate the dissolution behavior of levetiracetam from HPMC/Eudragit®NE matrices using magnesium aluminometasilicate (Neusilin® US2) as filler with excellent WAC. Part of this study was also to assess influence of thermal treatment on quality parameters of matrices. The use of Neusilin® allowed the application of Eudragit® dispersion to API/Neusilin® mixture in one step during high-shear wet granulation. HPMC was added extragranularly. Obtained matrices were investigated for qualitative characteristics, NMR solid-state spectroscopy (ssNMR), gel layer dynamic parameters, SEM, and principal component analysis (PCA). Decrease in burst effect (max. of 33.6%) and dissolution rate, increase in fitting to zero-order kinetics, and paradoxical reduction in gel layer thickness were observed with rising Eudragit® NE concentration. The explanation was done by ssNMR, which clearly showed a significant reduction of the API particle size (150-500 nm) in granules as effect of surfactant present in dispersion in dependence on Eudragit®NE amount. This change in API particle size resulted in a significantly larger interface between these two entities. Based on ANOVA and PCA, thermal treatment was not revealed as a useful procedure for this system.
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