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pH measurement and phosphate determination in pharmaceutical eye drops for eye diseases by digital image analysis. Microchem J 2021. [DOI: 10.1016/j.microc.2020.105854] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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2
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Ponnusamy C, Sugumaran A, Krishnaswami V, Kandasamy R, Natesan S. Design and development of artemisinin and dexamethasone loaded topical nanodispersion for the effective treatment of age-related macular degeneration. IET Nanobiotechnol 2019; 13:868-874. [PMID: 31625529 DOI: 10.1049/iet-nbt.2019.0130] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Age-related macular degeneration (AMD) is a disease affecting the macula by the new blood vessels formation. AMD is widely treated with a combination of anti-angiogenic and anti-vascular endothelial growth factor (VEGF) agents. The topical administration of nanodispersions showed enhanced ocular residence time with controlled and prolonged drug delivery to the disease site at the back of the eye. In the present study we developed and characterized nanodispersion containing anti-angiogenic (artemisinin) and anti-VEGF agent (dexamethasone) for the topical ocular administration in order to obtain a required drug concentration in the posterior part of the eye. The nanodispersions were prepared with varying concentration of polymer, polyvinyl pyrrolidone K90 and polymeric surfactant, Poloxamer 407. The nanodispersions were found to be smooth and spherical in shape with a size range of 12-26 nm. In-vitro drug release studies showed the 90-101% of artemisinin and 55-103% of dexamethasone release from the nanodispersions. The blank formulation with a high concentration of polymer and polymeric surfactant showed an acceptable level of haemolysis and DNA damage. The chorioallantoic membrane assay suggested that the nanodispersion possess good anti-angiogenic effect. Hence the formulated artemisinin and dexamethasone nanodispersion may have the great potential for the AMD treatment.
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Affiliation(s)
- Chandrasekar Ponnusamy
- Department of Pharmaceutical Technology, Bharathidasan Institute of Technology, Anna University, Tiruchirappalli, Tamilnadu, India
| | - Abimanyu Sugumaran
- Department of Pharmaceutics, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur, Tamilnadu, India
| | - Venkateshwaran Krishnaswami
- Department of Pharmaceutical Technology, Bharathidasan Institute of Technology, Anna University, Tiruchirappalli, Tamilnadu, India
| | - Ruckmani Kandasamy
- Department of Pharmaceutical Technology, Bharathidasan Institute of Technology, Anna University, Tiruchirappalli, Tamilnadu, India
| | - Subramanian Natesan
- Department of Pharmaceutical Technology, Bharathidasan Institute of Technology, Anna University, Tiruchirappalli, Tamilnadu, India.
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3
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Razzaq SN, Ashfaq M, Khan IU, Mariam I, Razzaq SS, Azeem W. Simultaneous determination of dexamethasone and moxifloxacin in pharmaceutical formulations using stability indicating HPLC method. ARAB J CHEM 2017. [DOI: 10.1016/j.arabjc.2014.11.016] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Razzaq SN, Ashfaq M, Khan IU, Mariam I, Razzaq SS, Mustafa G, Zubair M. Stability indicating RP-HPLC method for simultaneous determination of gatifloxacin and dexamethasone in binary combination. BRAZ J PHARM SCI 2017. [DOI: 10.1590/s2175-97902017000115177] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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5
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Ummiti K, Vakkala S, Panuganti V, Annarapu MR. ISOLATION, IDENTIFICATION, AND CHARACTERIZATION OF 17-OXO DEXAMETHASONE, AN OXIDATIVE DEGRADATION IMPURITY OF DEXAMETHASONE USING FLASH CHROMATOGRAPHY AND NMR/HRMS/IR. J LIQ CHROMATOGR R T 2014. [DOI: 10.1080/10826076.2013.836712] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Kumarswamy Ummiti
- a Generics-Analytical Research and Development , IPDO-Innovation Plaza, Dr. Reddy's Laboratories Limited , Hyderabad , India
| | - Sudhakar Vakkala
- a Generics-Analytical Research and Development , IPDO-Innovation Plaza, Dr. Reddy's Laboratories Limited , Hyderabad , India
| | - Venkatesh Panuganti
- a Generics-Analytical Research and Development , IPDO-Innovation Plaza, Dr. Reddy's Laboratories Limited , Hyderabad , India
| | - Malleswara Reddy Annarapu
- a Generics-Analytical Research and Development , IPDO-Innovation Plaza, Dr. Reddy's Laboratories Limited , Hyderabad , India
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Li L, Ma P, Wei J, Qian K, Tao L. LC-ESI-MS method for the determination of dexamethasone acetate in skin of nude mouse. J Chromatogr B Analyt Technol Biomed Life Sci 2013; 933:44-9. [DOI: 10.1016/j.jchromb.2013.06.024] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Revised: 06/11/2013] [Accepted: 06/13/2013] [Indexed: 10/26/2022]
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7
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Razzaq SN, Ashfaq M, Mariam I, Khan IU, Razzaq SS. Simultaneous RP-HPLC determination of sparfloxacin and dexamethasone in pharmaceutical formulations. BRAZ J PHARM SCI 2013. [DOI: 10.1590/s1984-82502013000200012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The present study describes the development and subsequent validation of simple and accurate stability indicating RP-HPLC method for the determination of sparfloxacin and dexamethasone in pharmaceutical formulations in the presence of their stress-induced degradation products. Both the drugs and their stress-induced degradation products were separated within 10 minutes using C8 column and mixture of methanol and 0.02 M phosphate buffer pH 3.0 (60:40 v/v, respectively) as mobile phase at 270 nm using diode array detector. Regression analysis showed linearity in the range of 15-105 µg/mL for sparfloxacin and 5-35 µg/mL for dexamethasone. All the analytes were adequately resolved with acceptable tailing. Peak purity of the two drugs was also greater than 0.9999, showing no co-elution peaks. The developed method was applied for simultaneous determination of sparfloxacin and dexamethasone in pharmaceutical formulations for stability studies.
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Heda AA, Kathiriya JM, Gadade DD, Puranik PK. Development and Validation of RP-HPLC Method for Simultaneous Determination of Granisetron and Dexamethasone. Indian J Pharm Sci 2012; 73:696-9. [PMID: 23112409 PMCID: PMC3480760 DOI: 10.4103/0250-474x.100255] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2010] [Revised: 11/28/2011] [Accepted: 12/05/2011] [Indexed: 11/17/2022] Open
Abstract
A new simple, selective, rapid, precise and accurate reverse phase HPLC method has been developed for simultaneous estimation of granisetron and dexamethasone. The method was developed using CPS Hypersil CN column (250×4.6 mm I.D.) with a mobile phase consisting of acetonitrile:buffer (100 mM Triethylamine adjusted to pH 3.0 with o-phosphoric acid) in ratio of 25:75 at a flow rate of 2 ml/min. Detection was carried out at 242 nm. The developed method was evaluated for various system suitability parameters and validated for linearity, accuracy, precision, LOD, LOQ as per ICH guidelines. It was also evaluated for bench top stability and freeze/thaw stability. The proposed method can be used for the estimation of these drugs in their combined dosage forms.
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Affiliation(s)
- A A Heda
- Department of Pharmaceutics, Government College of Pharmacy, Osmanpura, Vedant Road, Aurangabad-431 005, India
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Elshaer A, Hanson P, Worthington T, Lambert P, Mohammed AR. Preparation and characterization of amino acids-based trimethoprim salts. Pharmaceutics 2012; 4:179-96. [PMID: 24300187 PMCID: PMC3834905 DOI: 10.3390/pharmaceutics4010179] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2012] [Revised: 02/08/2012] [Accepted: 02/08/2012] [Indexed: 11/16/2022] Open
Abstract
Trimethoprim (TMP) is a dihydrofolate reductase (DHFR) inhibitor which prevents the conversion of dihydrofolic acid into tetrahydrofolic acid, resulting in the depletion of the latter and leading to bacterial death. Oral bioavailability of TMP is hindered by both its low solubility and low permeability. This study aims to prepare novel salts of TMP using anionic amino acids; aspartic and glutamic acid as counter ions in order to improve solubility and dissolution. TMP salts were prepared by lyophilisation and characterized using FT-IR spectroscopy, proton nuclear magnetic resonance (1HNMR), Differential Scanning Calorimetry (DSC) and Thermogravimetric analysis (TGA). Both the amino acids formed salts with TMP in a 1:1 molar ratio and showed a 280 fold improvement in solubility. Investigation of the microbiological activity of the prepared salts against TMP sensitive Escherichia coli showed that the new salts not only retained antibacterial activity but also exhibited higher zone of inhibition which was attributed to improved physicochemical characters such as higher solubility and dissolution. The results are an important finding that could potentially impact on faster onset of antibacterial activity and reduced therapeutic dose when administered to patients. Studies are underway investigating the effect of ion-pairing TMP with amino acids on the permeability profile of the drug.
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Affiliation(s)
- Amr Elshaer
- Aston Pharmacy School, Aston University, Aston Triangle, Birmingham B4 7ET, UK.
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Oliveira TMB, Ribeiro FWP, Soares JE, de Lima-Neto P, Correia AN. Square-wave adsorptive voltammetry of dexamethasone: Redox mechanism, kinetic properties, and electroanalytical determinations in multicomponent formulations. Anal Biochem 2011; 413:148-56. [DOI: 10.1016/j.ab.2011.02.033] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2010] [Revised: 02/15/2011] [Accepted: 02/21/2011] [Indexed: 11/25/2022]
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ZHOU Z, YE J, CHEN L, MA A, ZOU F. Simultaneous Determination of Ropivacaine, Bupivacaine and Dexamethasone in Biodegradable PLGA Microspheres by High Performance Liquid Chromatography. YAKUGAKU ZASSHI 2010; 130:1061-8. [DOI: 10.1248/yakushi.130.1061] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Zhifeng ZHOU
- School of Public Health and Tropical Medicine, Southern Medical University
| | - Jufeng YE
- School of Public Health and Tropical Medicine, Southern Medical University
| | - Lingyun CHEN
- School of Public Health and Tropical Medicine, Southern Medical University
| | - Ande MA
- School of Public Health and Tropical Medicine, Southern Medical University
| | - Fei ZOU
- School of Public Health and Tropical Medicine, Southern Medical University
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Zhang J, Liu M, Jin H, Deng L, Xing J, Dong A. In vitro enhancement of lactate esters on the percutaneous penetration of drugs with different lipophilicity. AAPS PharmSciTech 2010; 11:894-903. [PMID: 20496018 PMCID: PMC2902310 DOI: 10.1208/s12249-010-9449-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2009] [Accepted: 04/30/2010] [Indexed: 11/30/2022] Open
Abstract
Lactate esters are widely used as food additives, perfume materials, medicine additives, and personal care products. The objective of this work was to investigate the effect of a series of lactate esters as penetration enhancers on the in vitro skin permeation of four drugs with different physicochemical properties, including ibuprofen, salicylic acid, dexamethasone and 5-fluorouracil. The saturated donor solutions of the evaluated drugs in propylene glycol were used in order to keep a constant driving force with maximum thermodynamic activity. The permeability coefficient (K(p)), skin concentration of drugs (SC), and lag time (T), as well as the enhancement ratios for K(p) and SC were recorded. All results indicated that lactate esters can exert a significant influence on the transdermal delivery of the model drugs and there is a structure-activity relationship between the tested lactate esters and their enhancement effects. The results also suggested that the lactate esters with the chain length of fatty alcohol moieties of 10-12 are more effective enhancers. Furthermore, the enhancement effect of lactate esters increases with a decrease of the drug lipophilicity, which suggests that they may be more efficient at enhancing the penetration of hydrophilic drugs than lipophilic drugs. The influence of the concentration of lactate esters was evaluated and the optimal concentration is in the range of 5-10 wt.%. In sum, lactate esters as a penetration enhancer for some drugs are of interest for transdermal administration when the safety of penetration enhancers is a prime consideration.
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Affiliation(s)
- Jianhua Zhang
- />School of Materials Science and Engineering, Tianjin University, 300072 Tianjin, China
| | - Mei Liu
- />School of Chemical Engineering and Technology, Tianjin University, 300072 Tianjin, China
| | - Hongjian Jin
- />School of Chemical Engineering and Technology, Tianjin University, 300072 Tianjin, China
| | - Liandong Deng
- />School of Chemical Engineering and Technology, Tianjin University, 300072 Tianjin, China
| | - Jinfeng Xing
- />School of Chemical Engineering and Technology, Tianjin University, 300072 Tianjin, China
| | - Anjie Dong
- />School of Materials Science and Engineering, Tianjin University, 300072 Tianjin, China
- />School of Chemical Engineering and Technology, Tianjin University, 300072 Tianjin, China
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Simultaneous determination of 11 drugs belonging to four different groups in human urine samples by reversed-phase high-performance liquid chromatography method. Anal Chim Acta 2006. [DOI: 10.1016/j.aca.2006.04.002] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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14
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Abstract
The development during the last 15 years and the state-of-the-art in the analysis of bulk steroid hormone drugs and hormone-like structures and pharmaceutical formulations made thereof are summarized. Other steroids (sterols, bile acids, cardiac glycosides, vitamins D) as well as biological-clinical aspects and pharmacokinetic and metabolic studies are excluded from this review. The state-of-the-art is summarized based on comparisons of monographs in the latest editions of the European Pharmacopoeia, United States Pharmacopoeia and the Japanese Pharmacopoeia. This is followed by sections dealing with new developments in the methodology for the fields of spectroscopic and spectrophotometric, chromatographic, electrophoretic and hyphenated techniques as well electroanalytical methods. The review is terminated by two problem-oriented sections: examples on impurity and degradation profiling as well as enantiomeric analysis.
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Affiliation(s)
- Sándor Görög
- Gedeon Richter Ltd., POB 27, H-1475 Budapest, Hungary.
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