TY  - JOUR
AU  - Pesic, Nikola
AU  - Dapčević, Aleksandra
AU  - Ivkovic, Branka
AU  - Kachrimanis, Kyriakos
AU  - Mitric, Miodrag
AU  - Ibric, Svetlana
AU  - Medarevic, Đorđe
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4805
AB  - In this study, four low molecular weight (LMW) excipients, tryptophan (TRY), phenylalanine (PHE), lysine (LYS) and saccharin (SAC) were evaluated as co-formers to generate co-amorphous systems (CAMS) by ball milling with carvedilol (CRV). Mixtures of CRV and LMW excipient in 1:0.5, 1:1 and 1:2 drug:excipient molar ratios were ball milled and analysed by powder X-ray diffraction (PXRD), differential scanning calorimetry (DSC), Fourier transform (FT-IR) infrared spectroscopy and dissolution testing. CAMS were formed by milling of a mixture of CRV with TRY in 1:2 M ratio and SAC in 1:1 M ratio, while amorphization of only CRV was achieved in other mixtures with SAC. In other samples containing TRY and PHE, milling resulted in partial amorphization, while LYS was the least suitable excipient for the amorphization of CRV. Unexpectedly, the highest supersaturation of CRV was achieved from samples containing CRV and LYS in 1:1 and 1:2 M ratios, despite the absence of a significant reduction in CRV crystallinity upon milling of these samples. Increase of hydrophobic surface area caused by milling of samples with TRY and PHE and agglomeration during dissolution testing of samples containing SAC are likely causes of poor dissolution performance of mixtures containing fully or partially amorphous CRV.
T2  - International Journal of Pharmaceutics
T1  - Potential application of low molecular weight excipients for amorphization and dissolution enhancement of carvedilol
VL  - 608
DO  - 10.1016/j.ijpharm.2021.121033
ER  - 

@article{
author = "Pesic, Nikola and Dapčević, Aleksandra and Ivkovic, Branka and Kachrimanis, Kyriakos and Mitric, Miodrag and Ibric, Svetlana and Medarevic, Đorđe",
year = "2021",
abstract = "In this study, four low molecular weight (LMW) excipients, tryptophan (TRY), phenylalanine (PHE), lysine (LYS) and saccharin (SAC) were evaluated as co-formers to generate co-amorphous systems (CAMS) by ball milling with carvedilol (CRV). Mixtures of CRV and LMW excipient in 1:0.5, 1:1 and 1:2 drug:excipient molar ratios were ball milled and analysed by powder X-ray diffraction (PXRD), differential scanning calorimetry (DSC), Fourier transform (FT-IR) infrared spectroscopy and dissolution testing. CAMS were formed by milling of a mixture of CRV with TRY in 1:2 M ratio and SAC in 1:1 M ratio, while amorphization of only CRV was achieved in other mixtures with SAC. In other samples containing TRY and PHE, milling resulted in partial amorphization, while LYS was the least suitable excipient for the amorphization of CRV. Unexpectedly, the highest supersaturation of CRV was achieved from samples containing CRV and LYS in 1:1 and 1:2 M ratios, despite the absence of a significant reduction in CRV crystallinity upon milling of these samples. Increase of hydrophobic surface area caused by milling of samples with TRY and PHE and agglomeration during dissolution testing of samples containing SAC are likely causes of poor dissolution performance of mixtures containing fully or partially amorphous CRV.",
journal = "International Journal of Pharmaceutics",
title = "Potential application of low molecular weight excipients for amorphization and dissolution enhancement of carvedilol",
volume = "608",
doi = "10.1016/j.ijpharm.2021.121033"
}

Pesic, N., Dapčević, A., Ivkovic, B., Kachrimanis, K., Mitric, M., Ibric, S.,& Medarevic, Đ.. (2021). Potential application of low molecular weight excipients for amorphization and dissolution enhancement of carvedilol. in International Journal of Pharmaceutics, 608.
https://doi.org/10.1016/j.ijpharm.2021.121033

Pesic N, Dapčević A, Ivkovic B, Kachrimanis K, Mitric M, Ibric S, Medarevic Đ. Potential application of low molecular weight excipients for amorphization and dissolution enhancement of carvedilol. in International Journal of Pharmaceutics. 2021;608.
doi:10.1016/j.ijpharm.2021.121033 .

Pesic, Nikola, Dapčević, Aleksandra, Ivkovic, Branka, Kachrimanis, Kyriakos, Mitric, Miodrag, Ibric, Svetlana, Medarevic, Đorđe, "Potential application of low molecular weight excipients for amorphization and dissolution enhancement of carvedilol" in International Journal of Pharmaceutics, 608 (2021),
https://doi.org/10.1016/j.ijpharm.2021.121033 . .

TY  - JOUR
AU  - Milovanović, Stoja
AU  - Djuris, Jelena
AU  - Dapčević, Aleksandra
AU  - Lučić-Škorić, Marija
AU  - Medarevic, Đorđe
AU  - Pavlovic, Stefan M.
AU  - Ibric, Svetlana
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4959
AB  - This study investigates pharmaceutical polymers (Soluplus((R)), HPMCAS, and Eudragit((R)) E100) and supercritical CO2-assisted process for preparation of floating valsartan delivery systems. Tested process (at pressure of 30 MPa and temperature of 100 degrees C during 2 h) enabled preparation of stable porous valsartan formulations which was confirmed with FESEM and mercury intrusion porosimetry analysis. The bulk density of obtained formulations was lower than 550 kg/m(3). FTIR, DSC, and PXRD analysis indicated that there was no chemical interaction between the drug and polymers and that amorphous solid dispersions were obtained. Formulations with Soluplus((R)) and HPMCAS retained its buoyancy in 0.1 M HCl for longer than 24 h, while formulation with Eudragit((R)) E100 retained its buoyancy up to 2 h. Controlled valsartan release was influenced by solubility of polymers in the tested release medium, which was confirmed by UV/VIS spectroscopy. The obtained results provided framework for further development of floating drug delivery system using an environmental friendly process.
T2  - Journal of Polymer Research
T1  - Preparation of floating polymer-valsartan delivery systems using supercritical CO2
IS  - 3
VL  - 28
DO  - 10.1007/s10965-021-02440-1
ER  - 

@article{
author = "Milovanović, Stoja and Djuris, Jelena and Dapčević, Aleksandra and Lučić-Škorić, Marija and Medarevic, Đorđe and Pavlovic, Stefan M. and Ibric, Svetlana",
year = "2021",
abstract = "This study investigates pharmaceutical polymers (Soluplus((R)), HPMCAS, and Eudragit((R)) E100) and supercritical CO2-assisted process for preparation of floating valsartan delivery systems. Tested process (at pressure of 30 MPa and temperature of 100 degrees C during 2 h) enabled preparation of stable porous valsartan formulations which was confirmed with FESEM and mercury intrusion porosimetry analysis. The bulk density of obtained formulations was lower than 550 kg/m(3). FTIR, DSC, and PXRD analysis indicated that there was no chemical interaction between the drug and polymers and that amorphous solid dispersions were obtained. Formulations with Soluplus((R)) and HPMCAS retained its buoyancy in 0.1 M HCl for longer than 24 h, while formulation with Eudragit((R)) E100 retained its buoyancy up to 2 h. Controlled valsartan release was influenced by solubility of polymers in the tested release medium, which was confirmed by UV/VIS spectroscopy. The obtained results provided framework for further development of floating drug delivery system using an environmental friendly process.",
journal = "Journal of Polymer Research",
title = "Preparation of floating polymer-valsartan delivery systems using supercritical CO2",
number = "3",
volume = "28",
doi = "10.1007/s10965-021-02440-1"
}

Milovanović, S., Djuris, J., Dapčević, A., Lučić-Škorić, M., Medarevic, Đ., Pavlovic, S. M.,& Ibric, S.. (2021). Preparation of floating polymer-valsartan delivery systems using supercritical CO2. in Journal of Polymer Research, 28(3).
https://doi.org/10.1007/s10965-021-02440-1

Milovanović S, Djuris J, Dapčević A, Lučić-Škorić M, Medarevic Đ, Pavlovic SM, Ibric S. Preparation of floating polymer-valsartan delivery systems using supercritical CO2. in Journal of Polymer Research. 2021;28(3).
doi:10.1007/s10965-021-02440-1 .

Milovanović, Stoja, Djuris, Jelena, Dapčević, Aleksandra, Lučić-Škorić, Marija, Medarevic, Đorđe, Pavlovic, Stefan M., Ibric, Svetlana, "Preparation of floating polymer-valsartan delivery systems using supercritical CO2" in Journal of Polymer Research, 28, no. 3 (2021),
https://doi.org/10.1007/s10965-021-02440-1 . .

TY  - JOUR
AU  - Jovanović, Marija
AU  - Petrović, Miloš
AU  - Cvijic, Sandra
AU  - Tomić, Nataša
AU  - Stojanović, Dušica
AU  - Ibric, Svetlana
AU  - Uskoković, Petar
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4778
AB  - Gelatin-polyvinylpyrrolidone (PVP) and gelatin-poly(vinyl alcohol) (PVA) mucoadhesive buccal films loaded with propranolol hydrochloride (PRH) were prepared by semi-solid extrusion 3D printing. The aim of this study was to evaluate the effects of the synthetic polymers PVP and PVA on thermal and mechanical properties and drug release profiles of gelatin-based films. The Fourier-transform infrared spectroscopy showed that hydrogen bonding between gelatin and PVP formed during printing. In the other blend, neither the esterification of PVA nor gelatin occurred. Differential scanning calorimetry revealed the presence of partial helical structures. In line with these results, the mechanical properties and drug release profiles were different for each blend. Formulation with gelatin-PVP and PRH showed higher tensile strength, hardness, and adhesive strength but slower drug release than formulation with gelatin-PVA and PRH. The in silico population simulations indicated increased drug bioavailability and decreased inter-individual variations in the resulting pharmacokinetic profiles compared to immediate-release tablets. Moreover, the simulation results suggested that reduced PRH daily dosing can be achieved with prolonged-release buccal films, which improves patient compliance.
T2  - Pharmaceutics
T1  - 3D Printed Buccal Films for Prolonged-Release of Propranolol Hydrochloride: Development, Characterization and Bioavailability Prediction
IS  - 12
VL  - 13
DO  - 10.3390/pharmaceutics13122143
ER  - 

@article{
author = "Jovanović, Marija and Petrović, Miloš and Cvijic, Sandra and Tomić, Nataša and Stojanović, Dušica and Ibric, Svetlana and Uskoković, Petar",
year = "2021",
abstract = "Gelatin-polyvinylpyrrolidone (PVP) and gelatin-poly(vinyl alcohol) (PVA) mucoadhesive buccal films loaded with propranolol hydrochloride (PRH) were prepared by semi-solid extrusion 3D printing. The aim of this study was to evaluate the effects of the synthetic polymers PVP and PVA on thermal and mechanical properties and drug release profiles of gelatin-based films. The Fourier-transform infrared spectroscopy showed that hydrogen bonding between gelatin and PVP formed during printing. In the other blend, neither the esterification of PVA nor gelatin occurred. Differential scanning calorimetry revealed the presence of partial helical structures. In line with these results, the mechanical properties and drug release profiles were different for each blend. Formulation with gelatin-PVP and PRH showed higher tensile strength, hardness, and adhesive strength but slower drug release than formulation with gelatin-PVA and PRH. The in silico population simulations indicated increased drug bioavailability and decreased inter-individual variations in the resulting pharmacokinetic profiles compared to immediate-release tablets. Moreover, the simulation results suggested that reduced PRH daily dosing can be achieved with prolonged-release buccal films, which improves patient compliance.",
journal = "Pharmaceutics",
title = "3D Printed Buccal Films for Prolonged-Release of Propranolol Hydrochloride: Development, Characterization and Bioavailability Prediction",
number = "12",
volume = "13",
doi = "10.3390/pharmaceutics13122143"
}

Jovanović, M., Petrović, M., Cvijic, S., Tomić, N., Stojanović, D., Ibric, S.,& Uskoković, P.. (2021). 3D Printed Buccal Films for Prolonged-Release of Propranolol Hydrochloride: Development, Characterization and Bioavailability Prediction. in Pharmaceutics, 13(12).
https://doi.org/10.3390/pharmaceutics13122143

Jovanović M, Petrović M, Cvijic S, Tomić N, Stojanović D, Ibric S, Uskoković P. 3D Printed Buccal Films for Prolonged-Release of Propranolol Hydrochloride: Development, Characterization and Bioavailability Prediction. in Pharmaceutics. 2021;13(12).
doi:10.3390/pharmaceutics13122143 .

Jovanović, Marija, Petrović, Miloš, Cvijic, Sandra, Tomić, Nataša, Stojanović, Dušica, Ibric, Svetlana, Uskoković, Petar, "3D Printed Buccal Films for Prolonged-Release of Propranolol Hydrochloride: Development, Characterization and Bioavailability Prediction" in Pharmaceutics, 13, no. 12 (2021),
https://doi.org/10.3390/pharmaceutics13122143 . .

TY  - JOUR
AU  - Jovanović, Marija
AU  - Tomić, Nataša
AU  - Cvijic, Sandra
AU  - Stojanović, Dušica
AU  - Ibric, Svetlana
AU  - Uskoković, Petar
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4909
AB  - This study processes and characterizes propranolol hydrochloride/gelatin mucoadhesive buccal films. Two types of gelatin are used: Gelatin from porcine skin, type A (GA), and gelatin from bovine skin (GB). The influence of gelatin type on mechanical, mucoadhesive, and biopharmaceutical characteristics of buccal films is evaluated. Fourier-Transfer infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC) analysis show that GA with propranolol hydrochloride (PRH) in the film (GAP) formed a physical mixture, whereas GB with PRH (GBP) form a compound-complex. Results of mechanical testing (tensile test, hardness) revealed that GAP films exhibit higher elastic modulus, tensile strength, and hardness. A mucoahesion test shows that GBP has higher adhesion strength, while GAP shows higher work of adhesion. Both in vitro release study and in silico simulation indicated that processed films can provide effective drug transport through the buccal mucosa. In silico simulation shows improved bioavailability from buccal films, in comparison to the immediate-release tablets-indicating that the therapeutic drug dose can be markedly reduced.
T2  - Pharmaceutics
T1  - Mucoadhesive Gelatin Buccal Films with Propranolol Hydrochloride: Evaluation of Mechanical, Mucoadhesive, and Biopharmaceutical Properties
IS  - 2
VL  - 13
DO  - 10.3390/pharmaceutics13020273
ER  - 

@article{
author = "Jovanović, Marija and Tomić, Nataša and Cvijic, Sandra and Stojanović, Dušica and Ibric, Svetlana and Uskoković, Petar",
year = "2021",
abstract = "This study processes and characterizes propranolol hydrochloride/gelatin mucoadhesive buccal films. Two types of gelatin are used: Gelatin from porcine skin, type A (GA), and gelatin from bovine skin (GB). The influence of gelatin type on mechanical, mucoadhesive, and biopharmaceutical characteristics of buccal films is evaluated. Fourier-Transfer infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC) analysis show that GA with propranolol hydrochloride (PRH) in the film (GAP) formed a physical mixture, whereas GB with PRH (GBP) form a compound-complex. Results of mechanical testing (tensile test, hardness) revealed that GAP films exhibit higher elastic modulus, tensile strength, and hardness. A mucoahesion test shows that GBP has higher adhesion strength, while GAP shows higher work of adhesion. Both in vitro release study and in silico simulation indicated that processed films can provide effective drug transport through the buccal mucosa. In silico simulation shows improved bioavailability from buccal films, in comparison to the immediate-release tablets-indicating that the therapeutic drug dose can be markedly reduced.",
journal = "Pharmaceutics",
title = "Mucoadhesive Gelatin Buccal Films with Propranolol Hydrochloride: Evaluation of Mechanical, Mucoadhesive, and Biopharmaceutical Properties",
number = "2",
volume = "13",
doi = "10.3390/pharmaceutics13020273"
}

Jovanović, M., Tomić, N., Cvijic, S., Stojanović, D., Ibric, S.,& Uskoković, P.. (2021). Mucoadhesive Gelatin Buccal Films with Propranolol Hydrochloride: Evaluation of Mechanical, Mucoadhesive, and Biopharmaceutical Properties. in Pharmaceutics, 13(2).
https://doi.org/10.3390/pharmaceutics13020273

Jovanović M, Tomić N, Cvijic S, Stojanović D, Ibric S, Uskoković P. Mucoadhesive Gelatin Buccal Films with Propranolol Hydrochloride: Evaluation of Mechanical, Mucoadhesive, and Biopharmaceutical Properties. in Pharmaceutics. 2021;13(2).
doi:10.3390/pharmaceutics13020273 .

Jovanović, Marija, Tomić, Nataša, Cvijic, Sandra, Stojanović, Dušica, Ibric, Svetlana, Uskoković, Petar, "Mucoadhesive Gelatin Buccal Films with Propranolol Hydrochloride: Evaluation of Mechanical, Mucoadhesive, and Biopharmaceutical Properties" in Pharmaceutics, 13, no. 2 (2021),
https://doi.org/10.3390/pharmaceutics13020273 . .

TY  - JOUR
AU  - Krivokapic, Jovana
AU  - Ivanovic, Jasna
AU  - Krkobabic, Mirjana
AU  - Arsenijevic, Jelena
AU  - Ibric, Svetlana
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4921
AB  - The present study was aimed to investigate the feasibility of loading microcrystalline cellulose derived from the agricultural waste with poorly water-soluble drug by using supercritical carbon dioxide as impregnation medium. Operating parameters of supercritical impregnation process (pressure, temperature and time) were varied to in order to maximize loading of ibuprofen used as a model drug into microcrystalline cellulose. The efficiency of ibuprofen loading using supercritical impregnation and release kinetics studies of microcrystalline cellulose in two pharmaceutical forms, powder and tablets, were investigated. The highest amount of ibuprofen was impregnated in microcrystalline cellulose powder by using supercritical impregnation at 25 MPa and 40 degrees C for 24 h (9.43%). Increasing pressure in the range of 10 MPa-25 MPa and time from 2 h to 24 h favours loading of ibuprofen into microcrystalline cellulose. A higher loading efficiency at the same impregnation conditions was observed for powdered microcrystalline cellulose. Temperature change in range of 40-60 degrees C had negligible influence on loading efficiency. FT-IR spectroscopy analysis showed no evidence of chemical modification of microcrystalline cellulose after processing. In vitro drug release study showed that impregnated powder formulations released the total amount of ibuprofen immediately, while the impregnation of microcrystalline cellulose powder in the form of tablets led to the achievement of the sustained release profile.
T2  - Sustainable Chemistry and Pharmacy
T1  - Supercritical fluid impregnation of microcrystalline cellulose derived from the agricultural waste with ibuprofen
VL  - 21
DO  - 10.1016/j.scp.2021.100447
ER  - 

@article{
author = "Krivokapic, Jovana and Ivanovic, Jasna and Krkobabic, Mirjana and Arsenijevic, Jelena and Ibric, Svetlana",
year = "2021",
abstract = "The present study was aimed to investigate the feasibility of loading microcrystalline cellulose derived from the agricultural waste with poorly water-soluble drug by using supercritical carbon dioxide as impregnation medium. Operating parameters of supercritical impregnation process (pressure, temperature and time) were varied to in order to maximize loading of ibuprofen used as a model drug into microcrystalline cellulose. The efficiency of ibuprofen loading using supercritical impregnation and release kinetics studies of microcrystalline cellulose in two pharmaceutical forms, powder and tablets, were investigated. The highest amount of ibuprofen was impregnated in microcrystalline cellulose powder by using supercritical impregnation at 25 MPa and 40 degrees C for 24 h (9.43%). Increasing pressure in the range of 10 MPa-25 MPa and time from 2 h to 24 h favours loading of ibuprofen into microcrystalline cellulose. A higher loading efficiency at the same impregnation conditions was observed for powdered microcrystalline cellulose. Temperature change in range of 40-60 degrees C had negligible influence on loading efficiency. FT-IR spectroscopy analysis showed no evidence of chemical modification of microcrystalline cellulose after processing. In vitro drug release study showed that impregnated powder formulations released the total amount of ibuprofen immediately, while the impregnation of microcrystalline cellulose powder in the form of tablets led to the achievement of the sustained release profile.",
journal = "Sustainable Chemistry and Pharmacy",
title = "Supercritical fluid impregnation of microcrystalline cellulose derived from the agricultural waste with ibuprofen",
volume = "21",
doi = "10.1016/j.scp.2021.100447"
}

Krivokapic, J., Ivanovic, J., Krkobabic, M., Arsenijevic, J.,& Ibric, S.. (2021). Supercritical fluid impregnation of microcrystalline cellulose derived from the agricultural waste with ibuprofen. in Sustainable Chemistry and Pharmacy, 21.
https://doi.org/10.1016/j.scp.2021.100447

Krivokapic J, Ivanovic J, Krkobabic M, Arsenijevic J, Ibric S. Supercritical fluid impregnation of microcrystalline cellulose derived from the agricultural waste with ibuprofen. in Sustainable Chemistry and Pharmacy. 2021;21.
doi:10.1016/j.scp.2021.100447 .

Krivokapic, Jovana, Ivanovic, Jasna, Krkobabic, Mirjana, Arsenijevic, Jelena, Ibric, Svetlana, "Supercritical fluid impregnation of microcrystalline cellulose derived from the agricultural waste with ibuprofen" in Sustainable Chemistry and Pharmacy, 21 (2021),
https://doi.org/10.1016/j.scp.2021.100447 . .

TY  - JOUR
AU  - Djuris, Jelena
AU  - Milovanovic, Stoja
AU  - Medarevic, Djordje
AU  - Dobricic, Vladimir
AU  - Dapčević, Aleksandra
AU  - Ibric, Svetlana
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5030
AB  - Solid dispersions production is one of the substantial approaches for improvement of poor drug solubility. Additionally, supercritical fluid assisted method for preparation of solid dispersions can offer many advantages in comparison to the conventional melting or solvent-evaporation methods. Miscibility analysis provides valuable guidance for selection of the most appropriate polymeric carrier for dispersion of the drug of interest. In addition to the increased drug release rate, solid dispersions should have proper mechanical attributes in order to be successfully formulated in the final solid dosage form such as tablet. Therefore, several pharmaceutical grade polymers have been selected for development of BCS Class II drug carvedilol (CARV) solid dispersions. They were compared based on behavior in supercritical CO 2 and affinity towards CARV calculated from the miscibility analysis. By utilization of the supercritical CO 2 assisted method, solid dispersions of CARV with the selected (co)polymers (polyvinylpyrrolidone (PVP), hydroxypropyl methylcellulose (HPMC), Soluplus® and Eudragit®) were obtained. Properties of the prepared CARV-polymer dispersions were observed by the polarizing and scanning electron microscopy and analyzed by differential scanning calorimetry and Fourier transform infrared spectroscopy. CARV was additionally characterized by X-ray powder diffraction. Furthermore, in vitro dissolution studies and dynamic compaction analysis were performed on the selected samples of solid dispersions. Among the studied polymers, PVP and HPMC have been identified as polymers with the highest affinity towards CARV, based on the calculated δ p values. This has been also confirmed with the highest dissolution efficiency of CARV-PVP and CARV-HPMC solid dispersions. Solid state characterization indicated that CARV was dispersed either molecularly, or in the amorphous form, depending on interactions with each polymer. Determination of CARV-PVP and CARV-HPMC mechanical properties revealed that CARV-PVP solid dispersion has superior compactibility and tabletability. Therefore, CARV-PVP solid dispersion has been highlighted as the most appropriate for the further development of tablets as the final dosage form. Presented study provides an example for efficient approach for development of poorly soluble drug solid dispersion with satisfactory tableting properties.
PB  - Elsevier B.V.
T2  - International Journal of Pharmaceutics
T1  - Selection of the suitable polymer for supercritical fluid assisted preparation of carvedilol  solid dispersions
EP  - 200
SP  - 190
VL  - 554
DO  - 10.1016/j.ijpharm.2018.11.015
ER  - 

@article{
author = "Djuris, Jelena and Milovanovic, Stoja and Medarevic, Djordje and Dobricic, Vladimir and Dapčević, Aleksandra and Ibric, Svetlana",
year = "2019",
abstract = "Solid dispersions production is one of the substantial approaches for improvement of poor drug solubility. Additionally, supercritical fluid assisted method for preparation of solid dispersions can offer many advantages in comparison to the conventional melting or solvent-evaporation methods. Miscibility analysis provides valuable guidance for selection of the most appropriate polymeric carrier for dispersion of the drug of interest. In addition to the increased drug release rate, solid dispersions should have proper mechanical attributes in order to be successfully formulated in the final solid dosage form such as tablet. Therefore, several pharmaceutical grade polymers have been selected for development of BCS Class II drug carvedilol (CARV) solid dispersions. They were compared based on behavior in supercritical CO 2 and affinity towards CARV calculated from the miscibility analysis. By utilization of the supercritical CO 2 assisted method, solid dispersions of CARV with the selected (co)polymers (polyvinylpyrrolidone (PVP), hydroxypropyl methylcellulose (HPMC), Soluplus® and Eudragit®) were obtained. Properties of the prepared CARV-polymer dispersions were observed by the polarizing and scanning electron microscopy and analyzed by differential scanning calorimetry and Fourier transform infrared spectroscopy. CARV was additionally characterized by X-ray powder diffraction. Furthermore, in vitro dissolution studies and dynamic compaction analysis were performed on the selected samples of solid dispersions. Among the studied polymers, PVP and HPMC have been identified as polymers with the highest affinity towards CARV, based on the calculated δ p values. This has been also confirmed with the highest dissolution efficiency of CARV-PVP and CARV-HPMC solid dispersions. Solid state characterization indicated that CARV was dispersed either molecularly, or in the amorphous form, depending on interactions with each polymer. Determination of CARV-PVP and CARV-HPMC mechanical properties revealed that CARV-PVP solid dispersion has superior compactibility and tabletability. Therefore, CARV-PVP solid dispersion has been highlighted as the most appropriate for the further development of tablets as the final dosage form. Presented study provides an example for efficient approach for development of poorly soluble drug solid dispersion with satisfactory tableting properties.",
publisher = "Elsevier B.V.",
journal = "International Journal of Pharmaceutics",
title = "Selection of the suitable polymer for supercritical fluid assisted preparation of carvedilol  solid dispersions",
pages = "200-190",
volume = "554",
doi = "10.1016/j.ijpharm.2018.11.015"
}

Djuris, J., Milovanovic, S., Medarevic, D., Dobricic, V., Dapčević, A.,& Ibric, S.. (2019). Selection of the suitable polymer for supercritical fluid assisted preparation of carvedilol  solid dispersions. in International Journal of Pharmaceutics
Elsevier B.V.., 554, 190-200.
https://doi.org/10.1016/j.ijpharm.2018.11.015

Djuris J, Milovanovic S, Medarevic D, Dobricic V, Dapčević A, Ibric S. Selection of the suitable polymer for supercritical fluid assisted preparation of carvedilol  solid dispersions. in International Journal of Pharmaceutics. 2019;554:190-200.
doi:10.1016/j.ijpharm.2018.11.015 .

Djuris, Jelena, Milovanovic, Stoja, Medarevic, Djordje, Dobricic, Vladimir, Dapčević, Aleksandra, Ibric, Svetlana, "Selection of the suitable polymer for supercritical fluid assisted preparation of carvedilol  solid dispersions" in International Journal of Pharmaceutics, 554 (2019):190-200,
https://doi.org/10.1016/j.ijpharm.2018.11.015 . .