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Nsairat H, Al-Samydai A, El-Tanani M, Shakya AK, Ahmad S, Alsotari S, Alshaer W, Shanneir A, Saket MM, Arafat TA. In vitro dissolution equivalence of Jordanian sildenafil generics via validated, stability-indicating HPLC method. Bioanalysis 2024; 16:369-384. [PMID: 38497721 PMCID: PMC11235137 DOI: 10.4155/bio-2023-0257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Accepted: 02/23/2024] [Indexed: 03/19/2024] Open
Abstract
This study was conducted to compare dissolution profiles of four Jordanian registered sildenafil (SDF) products to the originator. Dissolution samples were analyzed utilizing a validated and stability-indicating HPLC method in human plasma. Validation was performed for specificity, linearity, limit of detection, lower limit of quantification, precision, trueness and stability. SDF was extracted from plasma samples using liquid-liquid extraction. The analysis was performed utilizing isocratic elution on C18 column with 1.0 ml/min flow rate. The regression value was ∼0.999 over 3 days with drug recovery between 86.6 to 89.8%with 10 ng/ml lower limit of quantitation. This method displayed a good selectivity of SDF with improved stability under various conditions. The method was used for SDF quantification in dissolution medium. Similarity factors for local products varied according to the used mediums, but all SDF local products passed the dissolution in vitro test since all of them showed a released of >85% after 60 min at the dissolution mediums.
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Affiliation(s)
- Hamdi Nsairat
- Pharmacological and Diagnostic Research Center, Faculty of Pharmacy, Al-Ahliyya Amman University, Amman, 19328, Jordan
| | - Ali Al-Samydai
- Pharmacological and Diagnostic Research Center, Faculty of Pharmacy, Al-Ahliyya Amman University, Amman, 19328, Jordan
| | - Mohamed El-Tanani
- Pharmacological and Diagnostic Research Center, Faculty of Pharmacy, Al-Ahliyya Amman University, Amman, 19328, Jordan
- College of Pharmacy, Ras Al Khaimah Medical and Health Sciences University, Ras Al Khaimah, 11172, United Arab Emirates
| | - Ashok K Shakya
- Pharmacological and Diagnostic Research Center, Faculty of Pharmacy, Al-Ahliyya Amman University, Amman, 19328, Jordan
| | - Somaya Ahmad
- Pharmacological and Diagnostic Research Center, Faculty of Pharmacy, Al-Ahliyya Amman University, Amman, 19328, Jordan
| | | | - Walhan Alshaer
- Cell Therapy Center, University of Jordan, Amman, 11942, Jordan
| | | | - Munib M Saket
- Department of Pharmaceutical and Chemical Engineering, School of Applied Medical Sciences, German Jordanian University, PO Box 35247 Amman, 11180, Jordan
| | - Tawfiq A Arafat
- Jordan Center for Pharmaceutical Research, PO Box 950435, Amman, 11195, Jordan
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Hassan AME, El Hamd MA, El-Maghrabey MH, Mahdi WA, Alshehri S, Batakoushy HA. Two Versatile Pencil Graphite-Polymer Sensor Electrodes Coupled with Potentiometry and Potentiometric Titration Methods: Profiling Determinations of Vitamin V in Tablets and Urine Samples. SENSORS (BASEL, SWITZERLAND) 2022; 22:9128. [PMID: 36501827 PMCID: PMC9739328 DOI: 10.3390/s22239128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 11/11/2022] [Accepted: 11/22/2022] [Indexed: 06/17/2023]
Abstract
Herein, we developed a new pencil graphite ion-selective electrode strategy for the broadly used erectile dysfunction medication, sildenafil citrate (SC, vitamin V), for its automated potentiometry and potentiometric titration profiling in marketed tablets and human urine samples. The method was based on ion-pair complexation between SC and sodium tetraphenylborate (Na-TPB) or phosphotungstic acid (PTA), embedded into a pencil-fabricated graphite sensor electrode coated with poly(vinyl chloride, PVC) matrix, which is pre-plasticized with two different pre-studied plasticizers. The modern fabricated electrodes have a proven fast near-Nernstian response for SC over the concentration range of 1.0 × 10-6 to 1.0 × 10-2 and 1.0 × 10-5 to 1.0 × 10-2 M, with LODs of 6.5 × 10-7 and 5.5 × 10-6 over a pH 3-6 for (SC-TPB)- and (SC-PTA)-based membrane sensors, of O-nitrophenyl octyl ether (O-NPOE) and dioctyl phthalate (DOP), respectively. The selectivity coefficients for different interferents, including many inorganic cations, sugars, and/or nitrogenous compounds, were tested and confirmed. Applications of the proposed method were conducted on the determination of SC in its tablets and urine samples under the proper conditions. The percent recovery values were compared with those obtained by an official method and showed an RSD ≤ 0.3% (n = 5).
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Affiliation(s)
- Abeer M. E. Hassan
- Department of Chemistry, Faculty of Pharmacy, 6 October University, 6th of October City 12585, Egypt
| | - Mohamed A. El Hamd
- Department of Pharmaceutical Sciences, College of Pharmacy, Shaqra University, Shaqra 11961, Saudi Arabia
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, South Valley University, Qena 83523, Egypt
| | - Mahmoud H. El-Maghrabey
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt
| | - Wael A. Mahdi
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Sultan Alshehri
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Hany A. Batakoushy
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Menoufia University, Shebin Elkom 32511, Egypt
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Hemdan A, Tawakol SM. HPLC–UV Chromatographic Methods for Detection and Quantification of Undeclared Withdrawn Synthetic Medications in Counterfeit Herbal Medicines with Confirmation by HPLC–PDA and Mass Spectrometry. Chromatographia 2018. [DOI: 10.1007/s10337-018-3502-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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Liew KB, Loh GOK, Tan YTF, Peh KK. Simultaneous quantification of sildenafil andN-desmethyl sildenafil in human plasma by UFLC coupled with ESI-MS/MS and pharmacokinetic and bioequivalence studies in Malay population. Biomed Chromatogr 2014; 29:953-60. [DOI: 10.1002/bmc.3378] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Revised: 09/04/2014] [Accepted: 10/04/2014] [Indexed: 11/06/2022]
Affiliation(s)
- Kai Bin Liew
- School of Pharmaceutical Sciences; Universiti Sains Malaysia; 11800 Minden Penang Malaysia
| | - Gabriel Onn Kit Loh
- School of Pharmaceutical Sciences; Universiti Sains Malaysia; 11800 Minden Penang Malaysia
| | - Yvonne Tze Fung Tan
- School of Pharmaceutical Sciences; Universiti Sains Malaysia; 11800 Minden Penang Malaysia
| | - Kok Khiang Peh
- School of Pharmaceutical Sciences; Universiti Sains Malaysia; 11800 Minden Penang Malaysia
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Dżygiel P, Fraier D. Simultaneous Determination of Pregabalin, Sildenafil and Its Active Metabolite in Rat Plasma Utilising SPE Followed by LC–MS–MS. Chromatographia 2011. [DOI: 10.1007/s10337-011-2004-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Batista ÉF, Sartori ER, Medeiros RA, Rocha-Filho RC, Fatibello-Filho O. Differential Pulse Voltammetric Determination of Sildenafil Citrate (Viagra®) in Pharmaceutical Formulations Using a Boron-Doped Diamond Electrode. ANAL LETT 2010. [DOI: 10.1080/00032710903491153] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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