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Sun Y, Østergaard J. Application of UV Imaging in Formulation Development. Pharm Res 2016; 34:929-940. [PMID: 27766463 DOI: 10.1007/s11095-016-2047-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Accepted: 10/03/2016] [Indexed: 12/18/2022]
Abstract
Efficient drug delivery is dependent on the drug substance dissolving in the body fluids, being released from dosage forms and transported to the site of action. A fundamental understanding of the interplay between the physicochemical properties of the active compound and pharmaceutical excipients defining formulation behavior after exposure to the aqueous environments and pharmaceutical performance is critical in pharmaceutical development, manufacturing and quality control of drugs. UV imaging has been explored as a tool for qualitative and quantitative characterization of drug dissolution and release with the characteristic feature of providing real-time visualization of the solution phase drug transport in the vicinity of the formulation. Events occurring during drug dissolution and release, such as polymer swelling, drug precipitation/recrystallization, or solvent-mediated phase transitions related to the structural properties of the drug substance or formulation can be monitored. UV imaging is a non-intrusive and simple-to-operate analytical technique which holds potential for providing a mechanistic foundation for formulation development. This review aims to cover applications of UV imaging in the early and late phase pharmaceutical development with a special focus on the relation between structural properties and performance. Potential areas of future advancement and application are also discussed.
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Affiliation(s)
- Yu Sun
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100, Copenhagen Ø, Denmark
| | - Jesper Østergaard
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100, Copenhagen Ø, Denmark.
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2
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Svanbäck S, Ehlers H, Antikainen O, Yliruusi J. High-Speed Intrinsic Dissolution Rate in One Minute Using the Single-Particle Intrinsic Dissolution Rate Method. Anal Chem 2015; 87:11058-64. [PMID: 26439135 DOI: 10.1021/acs.analchem.5b03067] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Intrinsic dissolution rate (IDR) has traditionally been determined from a constant surface area of a substance. Here we present an optofluidic single-particle intrinsic dissolution rate (SIDR) method, by means of which real-time determination of IDR from continuously changing effective surface areas of dissolving individual microparticles, is possible. The changing surface area of the individual microparticles is characterized through continuous random orientation 3D particle morphology characterization during the dissolution process. Using noninvasive optical monitoring and nonspecific image analysis, we determined IDRs of a diverse set of substances from individual pure-substance microparticles (14-747 μg) with an average relative standard deviation of 9.4%. A linear fit between SIDR and literature equilibrium solubility values (R(2) = 0.999) was achieved and kinetic solubility equivalent SIDRs were obtained, for all substances, in as little as 1 min. Such miniaturized methods could become valuable tools in drug discovery, by providing resource sparing higher quality data acquisition means to replace current high-throughput solubility methods.
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Affiliation(s)
- Sami Svanbäck
- Division of Pharmaceutical Chemistry and Technology, University of Helsinki , P.O. Box 56, FI-00014 Helsinki, Finland
| | - Henrik Ehlers
- Division of Pharmaceutical Chemistry and Technology, University of Helsinki , P.O. Box 56, FI-00014 Helsinki, Finland
| | - Osmo Antikainen
- Division of Pharmaceutical Chemistry and Technology, University of Helsinki , P.O. Box 56, FI-00014 Helsinki, Finland
| | - Jouko Yliruusi
- Division of Pharmaceutical Chemistry and Technology, University of Helsinki , P.O. Box 56, FI-00014 Helsinki, Finland
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3
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Kinnear SL, McKelvey K, Snowden ME, Peruffo M, Colburn AW, Unwin PR. Dual-barrel conductance micropipet as a new approach to the study of ionic crystal dissolution kinetics. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:15565-72. [PMID: 24224979 DOI: 10.1021/la403630u] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
A new approach to the study of ionic crystal dissolution kinetics is described, based on the use of a dual-barrel theta conductance micropipet. The solution in the pipet is undersaturated with respect to the crystal of interest, and when the meniscus at the end of the micropipet makes contact with a selected region of the crystal surface, dissolution occurs causing the solution composition to change. This is observed, with better than 1 ms time resolution, as a change in the ion conductance current, measured across a potential bias between an electrode in each barrel of the pipet. Key attributes of this new technique are: (i) dissolution can be targeted at a single crystal surface; (ii) multiple measurements can be made quickly and easily by moving the pipet to a new location on the surface; (iii) materials with a wide range of kinetics and solubilities are open to study because the duration of dissolution is controlled by the meniscus contact time; (iv) fast kinetics are readily amenable to study because of the intrinsically high mass transport rates within tapered micropipets; (v) the experimental geometry is well-defined, permitting finite element method modeling to allow quantitative analysis of experimental data. Herein, we study the dissolution of NaCl as an example system, with dissolution induced for just a few milliseconds, and estimate a first-order heterogeneous rate constant of 7.5 (±2.5) × 10(-5) cm s(-1) (equivalent surface dissolution flux ca. 0.5 μmol cm(-2) s(-1) into a completely undersaturated solution). Ionic crystals form a huge class of materials whose dissolution properties are of considerable interest, and we thus anticipate that this new localized microscale surface approach will have considerable applicability in the future.
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Affiliation(s)
- Sophie L Kinnear
- Department of Chemistry and ‡MOAC Doctoral Training Centre, University of Warwick , Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
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Fussell A, Garbacik E, Offerhaus H, Kleinebudde P, Strachan C. In situ dissolution analysis using coherent anti-Stokes Raman scattering (CARS) and hyperspectral CARS microscopy. Eur J Pharm Biopharm 2013; 85:1141-7. [DOI: 10.1016/j.ejpb.2013.08.012] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2013] [Revised: 07/31/2013] [Accepted: 08/20/2013] [Indexed: 11/16/2022]
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Qiao N, Wang K, Schlindwein W, Davies A, Li M. In situ monitoring of carbamazepine-nicotinamide cocrystal intrinsic dissolution behaviour. Eur J Pharm Biopharm 2012; 83:415-26. [PMID: 23159709 DOI: 10.1016/j.ejpb.2012.10.005] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2012] [Revised: 10/17/2012] [Accepted: 10/21/2012] [Indexed: 10/27/2022]
Abstract
Cocrystals have shown huge potential to improve the dissolution rate and absorption of a poorly water soluble drug. However, solution mediated phase transformation of cocrystals could greatly reduce the enhancement of its apparent solubility and dissolution rate. The aim of this study is to gain a deep understanding of the phase transition behaviour of cocrystals during dissolution and to investigate the improvement of dissolution rate. Dissolution and transformation behaviour of carbamazepine-nicotinamide (CBZ-NIC) cocrystal, physical mixture and different forms of carbamazepine: form I (CBZ I), form III (CBZ III) and dihydrate (CBZ DH) were studied by different in situ techniques of UV imaging and Raman spectroscopy. It has been found that compared with CBZ III and I, the rate of intrinsic dissolution rate (IDR) of CBZ-NIC cocrystal decreases slowly during dissolution, indicating the rate of crystallisation of CBZ DH from the solution is slow. In situ solid-state characterisation has shown the evolution of conversion of CBZ-NIC cocrystal and polymorphs to its dihydrate form. The study has shown that in situ UV imaging and Raman spectroscopy with a complementary technique of SEM can provide an in depth understanding during dissolution of cocrystals.
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Affiliation(s)
- Ning Qiao
- School of Pharmacy, De Montfort University, Leicester, UK
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Gordon S, Naelapää K, Rantanen J, Selen A, Müllertz A, Østergaard J. Real-time dissolution behavior of furosemide in biorelevant media as determined by UV imaging. Pharm Dev Technol 2012; 18:1407-16. [PMID: 23136844 DOI: 10.3109/10837450.2012.737808] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The potential of UV imaging as a new small scale flow-through dissolution testing platform and its ability to incorporate biorelevant media was tested. Furosemide was utilized as a model poorly soluble drug, and dissolution media simulating conditions in the small intestine (5/1.25 mM and 40/10 mM bile salt/phospholipid, pH 6.5) together with corresponding blank buffer were employed. Dissolution rates as a function of flow rate (0.2-1.0 mL/min) were determined directly from UV images, and by analysis of collected effluent using UV spectrophotometry. A good agreement in dissolution rates was observed, however repeatability of data based on measurement of collected effluent was superior to that obtained by UV imaging in the utilized prototypic flow cell. Both methods indicated that biorelevant media did not markedly increase the dissolution rate of furosemide as compared to buffer. Qualitatively, UV images indicated that uncontrolled swelling/precipitation of furosemide on the compact surface was occurring in some samples. In situ Raman spectroscopy together with X-ray diffraction analysis confirmed that the observations were not due to a solid form transformation of furosemide. The presented results highlight the complementary features of the utilized techniques and, in particular, the detailed information related to dissolution behavior which can be achieved by UV imaging.
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Affiliation(s)
- Sarah Gordon
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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A new cocrystal and salts of itraconazole: Comparison of solid-state properties, stability and dissolution behavior. Int J Pharm 2012; 436:403-9. [DOI: 10.1016/j.ijpharm.2012.06.045] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2012] [Revised: 06/14/2012] [Accepted: 06/20/2012] [Indexed: 11/23/2022]
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Boetker JP, Savolainen M, Koradia V, Tian F, Rades T, Müllertz A, Cornett C, Rantanen J, Østergaard J. Insights into the early dissolution events of amlodipine using UV imaging and Raman spectroscopy. Mol Pharm 2011; 8:1372-80. [PMID: 21634435 DOI: 10.1021/mp200205z] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Traditional dissolution testing determines drug release to the bulk, but does not enable an understanding of the events happening close to the surface of a solid or a tablet. UV imaging is a new imaging approach that can be used to study the dissolution behavior of chemical compounds. The UV imaging instrumentation offers recording of absorbance maps with a high spatial and temporal resolution which facilitates the abundant collection of information regarding the evolving solution concentrations. In this study, UV imaging was used to visualize the dissolution behavior of amlodipine besylate (amorphous and dihydrate forms) and amlodipine free base. The dissolution of amlodipine besylate was faster from the amorphous form than from the crystalline forms. The UV imaging investigations suggested that a solvent mediated phase transformation occurred for the amorphous amlodipine besylate and the amlodipine free base samples. Raman spectroscopy was used to confirm and probe the changes at the solid surface occurring upon contact with the dissolution media and verified the recrystallization of the amorphous form to the monohydrate. The combination of UV imaging and Raman spectroscopy is an efficient tool to obtain a deeper insight into the early events of the dissolution process.
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Affiliation(s)
- Johan P Boetker
- Department of Pharmaceutics and Analytical Chemistry, Faculty of Pharmaceutical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
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Chieng N, Rades T, Aaltonen J. An overview of recent studies on the analysis of pharmaceutical polymorphs. J Pharm Biomed Anal 2011; 55:618-44. [DOI: 10.1016/j.jpba.2010.12.020] [Citation(s) in RCA: 204] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2010] [Revised: 12/11/2010] [Accepted: 12/15/2010] [Indexed: 11/26/2022]
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Heinz A, Strachan CJ, Gordon KC, Rades T. Analysis of solid-state transformations of pharmaceutical compounds using vibrational spectroscopy. J Pharm Pharmacol 2010. [DOI: 10.1211/jpp.61.08.0001] [Citation(s) in RCA: 159] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Abstract
Objectives
Solid-state transformations may occur during any stage of pharmaceutical processing and upon storage of a solid dosage form. Early detection and quantification of these transformations during the manufacture of solid dosage forms is important since the physical form of an active pharmaceutical ingredient can significantly influence its processing behaviour, including powder flow and compressibility, and biopharmaceutical properties such as solubility, dissolution rate and bioavailability.
Key findings
Vibrational spectroscopic techniques such as infrared, near-infrared, Raman and, most recently, terahertz pulsed spectroscopy have become popular for solidstate analysis since they are fast and non-destructive and allow solid-state changes to be probed at the molecular level. In particular, Raman and near-infrared spectroscopy, which require no sample preparation, are now commonly used coupled to fibreoptic probes and are able to characterise solid-state conversions in-line. Traditionally, uni- or bivariate approaches have been used to analyse spectroscopic data sets; however, recently the simultaneous detection of several solid-state forms has been increasingly performed using multivariate approaches where even overlapping spectral bands can be analysed.
Summary
This review discusses the applications of different vibrational spectroscopic techniques to detect and monitor solid-state transformations possible for crystalline polymorphs, hydrates and amorphous forms of pharmaceutical compounds. In this context, the theoretical basis of solid-state transformations and vibrational spectroscopy and common experimental approaches are described, including recent methods of data analysis.
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Affiliation(s)
- Andrea Heinz
- School of Pharmacy, University of Otago, New Zealand
| | - Clare J Strachan
- School of Pharmacy, University of Otago, New Zealand
- Centre for Drug Research, Faculty of Pharmacy, University of Helsinki, Finland
| | - Keith C Gordon
- Department of Chemistry, University of Otago, New Zealand
| | - Thomas Rades
- School of Pharmacy, University of Otago, New Zealand
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Lehto P, Aaltonen J, Tenho M, Rantanen J, Hirvonen J, Tanninen VP, Peltonen L. Solvent-Mediated Solid Phase Transformations of cArbamazepine: Effects of Simulated Intestinal Fluid and Fasted State Simulated Intestinal Fluid. J Pharm Sci 2009; 98:985-96. [DOI: 10.1002/jps.21490] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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