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A Simple and Validated Stability Indicating HPLC Method for Simultaneous Quantification of Brimonidine, Timolol and Benzalkonium Chloride in Anti-Glaucoma Ophthalmic Formulations
Corresponding Author(s) : A. Krishnamanjari Pawar
Asian Journal of Chemistry,
Vol. 35 No. 1 (2023): Vol 35 Issue 1
Abstract
The combined dosage form of brimonidine, timolol and benzalkonium chloride is prescribed for lowering intraocular pressure in patients with ocular hypertension. As no analytical HPLC method reported for the estimation of brimonidine, timolol and benzalkonium chloride together in ophthalmic formulations, the present study was aimed to fulfill the gap identified in literature. The separation of analytes was achieved on Cosmosil C18 (250 × 4.6 mm; 5 μ id) as stationary phase, pH 4.3 acetate buffer and methanol in 30:70 (v/v) as mobile phase at 1.0 mL/min and UV detection at 227 nm. In this condition, well resolved, retained peaks were identified at 3.11 min for brimonidine, 4.86 min for timolol and 5.57 min for benzalkonium chloride. The method reports 0.5, 1.25 and 0.0125 μg/mL, respectively for brimonidine, timolol and benzalkonium chloride as LOD, which proves that the method have enough sensitivity levels for the detection analytes in samples. The method passes all the validation parameters as per the guidelines proved that the method was valid. The method shows less % degradation in various stress studies such as acidic, base, peroxide, thermal and UV light conditions and can effectively separate various stress degradation compounds and confirms the stability indicating nature of the method. The method applicability was assessed by analyzing the drug content in Combigan® ophthalmic drops and method reports the assay of 98.92%, 99.36% and 98.46% for brimonidine, timolol and benzalkonium chloride, respectively. Based on the results, it can be concluded that the method can adequately suitable for the separation and quantification of brimonidine, timolol and benzalkonium chloride and hence can be applicable for the routine analysis of brimonidine, timolol and benzalkonium chloride in ophthalmic formulations.
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- L.B. Cantor and J. Burke, Expert Opin. Investig. Drugs, 6, 1063 (1997); https://doi.org/10.1517/13543784.6.8.1063
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- B.M.P. Pereira and I. Tagkopoulos, Appl. Environ. Microbiol., 85, e00377 (2019); https://doi.org/10.1128/AEM.00377-19
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References
L.B. Cantor and J. Burke, Expert Opin. Investig. Drugs, 6, 1063 (1997); https://doi.org/10.1517/13543784.6.8.1063
J.C. Adkins and J.A. Balfour, Drugs Aging, 12, 225 (1998); https://doi.org/10.2165/00002512-199812030-00005
C.B. Toris, C.B. Camras and M.E. Yablonski, Am. J. Ophthalmol., 128, 8 (1999); https://doi.org/10.1016/S0002-9394(99)00076-8
M. Volotinen, M. Turpeinen, A. Tolonen, J. Uusitalo, J. Mäenpää and O. Pelkonen, Drug Metab. Dispos., 35, 1135 (2007); https://doi.org/10.1124/dmd.106.012906
T. Atkin, S. Comai and G. Gobbi, Pharmacol. Rev., 70, 197 (2018); https://doi.org/10.1124/pr.117.014381
J.H. Liu, D.F. Kripke and R.N. Weinreb, Am. J. Ophthalmol., 138, 389 (2004); https://doi.org/10.1016/j.ajo.2004.04.022
B.M.P. Pereira and I. Tagkopoulos, Appl. Environ. Microbiol., 85, e00377 (2019); https://doi.org/10.1128/AEM.00377-19
S.M. Choi, T.H. Roh, D.S. Lim, S. Kacew, H.S. Kim and B.M. Lee, J. Toxicol. Environ. Health B Crit. Rev., 21, 8 (2018); https://doi.org/10.1080/10937404.2017.1408552
O. Condell, C. Iversen, S. Cooney, K.A. Power, C. Walsh, C. Burgess and S. Fanning, Appl. Environ. Microbiol., 78, 3087 (2012); https://doi.org/10.1128/AEM.07534-11
M.H. Goldstein, F.Q. Silva, N. Blender, T. Tran and S. Vantipalli, Eye, 36, 361 (2022); https://doi.org/10.1038/s41433-021-01668-x
H.M. Hafez, A.A. Elshanawany, L.M. Abdelaziz and M.S. Mohram, Eurasian J. Anal. Chem., 10, 46 (2015).
H.M. Hafez, A.A. Elshanawane, L.M. Abdelaziz and M.S. Mohram, J Appl. Pharm., 6, 398 (2014).
E. Büker and E. Dinç, J. Chromatogr. Sci., 55, 154 (2017); https://doi.org/10.1093/chromsci/bmw160
M.C. Damle and A. Zirange, Int. J. Res. Culture Soc., 2(7), 1 (2018).
M.A. Mukthinuthalapati, S. Malineni and S.V.S. Vellanki, J. Anal. Pharm. Res., 4, 14 (2017).
S. Kondra, B. Akula Thukaram, D. Gowrisankar, P.A. Krishnamanjari, H.S.N. Raju Dantuluri and S. Maganti, Ann. Pharm. Fr., 79, 617 (2021); https://doi.org/10.1016/j.pharma.2021.02.006
J. Venkateswaran, M. Sundarapandian and S. Venkataraman, Asian J. Pharm., 11, S588 (2017).
M. Walash and R. El-Shaheny, Yao Wu Shi Pin Fen Xi, 24, 441 (2016); https://doi.org/10.1016/j.jfda.2015.11.006
B.B. Kasimala, V.R. Anna and U.R. Mallu, Indian Drugs, 55, 41 (2018).
U.R. Mallu, V.R. Anna and B.B. Kasimala, Turk. J. Pharm. Sci., 16, 457 (2019); https://doi.org/10.4274/tjps.galenos.2018.34635
ICH Expert Working Group, ICH harmonised tripartite guideline–Validation of Analytical Procedures Text and Methodology: Q2 (R1). In Geneva: International Conference on Harmonisation of Technical Requirements for Registration of Pharmaceuticals for Human Use (2005)