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Prins-Can I, van Berlo-van de Laar IRF, Zeeman M, Vermeij CG, van 't Riet E, Taxis K, Jansman FGA. Assessing the binding interaction of polystyrene sulfonate with amitriptyline in healthy volunteers: a cross-over design - The BIND study. Eur J Clin Pharmacol 2022; 78:839-845. [PMID: 35171315 DOI: 10.1007/s00228-022-03283-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Accepted: 01/24/2022] [Indexed: 11/28/2022]
Abstract
PURPOSE Polystyrene sulfonate is used for binding potassium in patients with chronic kidney disease (CKD). Because of its binding properties, it can potentially bind other medications and thereby decrease their bioavailability and effectiveness. Amitriptyline, often used by CKD patients for neuropathic pain, shows significant binding to polystyrene sulfonate in vitro. The purpose of this study was to determine the effect of polystyrene sulfonate on the exposure of amitriptyline in vivo when taken concomitantly in healthy volunteers. METHODS We performed a prospective cross-over study in nine healthy volunteers. Participants were 18 years of age or older, did not use any medication, and had no known allergy to amitriptyline or polystyrene sulfonate. Participants visited Deventer Teaching Hospital twice. Once they received a single dose of amitriptyline 50 mg and once they received a single dose of both polystyrene sulfonate 15 g and amitriptyline 50 mg taken concomitantly, with a wash out period of at least 1 week. After intake of the medication, six blood samples were collected, at 2, 3, 4, 5, 6, and 8 h. Blood samples were analysed to determine maximum concentration (Cmax) and area under the curve 0-8 h after intake (AUC0-8 h). Difference in Cmax and AUC0-8 h was analysed with a paired T-test or Wilcoxon signed rank test, depending on normality of the data. A p-value < 0.05 was considered statistically significant. RESULTS Of the nine participants included, eight participants completed both visits to the hospital. Mean maximum concentration (Cmax) of amitriptyline was 35.61 µg l-1 (95% CI 27.90-43.33 µg l-1) when taken alone, compared to 9.25 µg l-1 (95% CI 6.59-11.92 µg l-1) when taken with polystyrene sulfonate (p < 0.001). Mean AUC0-8 h of amitriptyline was 168.20 µg × h l-1 (95% CI 139.95-196.45 µg × h l-1) when taken alone and 45.78 µg × h l-1 (95% CI 30.20-61.36 µg × h l-1) when taken with polystyrene sulfonate (p < 0.0001). CONCLUSION These results show a significant decrease in exposure of amitriptyline of approximately 75% when taken concomitantly with polystyrene sulfonate, thereby probably compromising therapy efficacy. Patients using both amitriptyline and polystyrene sulfonate should be informed to separate intake of these medications. TRIAL REGISTRATION NL8539 (17 April 2020).
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Affiliation(s)
- I Prins-Can
- Department of Clinical Pharmacy, Deventer Teaching Hospital, Nico, Bolkesteinlaan 75, 7416 SE, Deventer, The Netherlands.
| | - I R F van Berlo-van de Laar
- Department of Clinical Pharmacy, Deventer Teaching Hospital, Nico, Bolkesteinlaan 75, 7416 SE, Deventer, The Netherlands.,Unit of PharmacoTherapy, -Epidemiology & -Economics, Groningen Research Institute of Pharmacy (GRIP), University of Groningen, Antonius Deusinglaan 1, 9713 AV, Groningen, The Netherlands
| | - M Zeeman
- Department of Geriatrics, Deventer Teaching Hospital, Nico, Bolkesteinlaan 75, 7416 SE, Deventer, The Netherlands
| | - C G Vermeij
- Department of Nephrology, Deventer Teaching Hospital, Nico, Bolkesteinlaan 75, 7416 SE, Deventer, The Netherlands
| | - E van 't Riet
- Department of Research and Development, Deventer Teaching Hospital, Nico, Bolkesteinlaan 75, 7416 SE, Deventer, The Netherlands
| | - K Taxis
- Unit of PharmacoTherapy, -Epidemiology & -Economics, Groningen Research Institute of Pharmacy (GRIP), University of Groningen, Antonius Deusinglaan 1, 9713 AV, Groningen, The Netherlands
| | - F G A Jansman
- Department of Clinical Pharmacy, Deventer Teaching Hospital, Nico, Bolkesteinlaan 75, 7416 SE, Deventer, The Netherlands.,Unit of PharmacoTherapy, -Epidemiology & -Economics, Groningen Research Institute of Pharmacy (GRIP), University of Groningen, Antonius Deusinglaan 1, 9713 AV, Groningen, The Netherlands
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Exploring co-dispensed drug use in patients on sevelamer or polystyrene sulfonate to identify potential novel binding interactions: a cross sectional in silico study : Potential novel binding interactions with resins. Int J Clin Pharm 2021; 44:389-398. [PMID: 34850339 DOI: 10.1007/s11096-021-01355-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Accepted: 11/09/2021] [Indexed: 10/19/2022]
Abstract
Background Sevelamer and polystyrene sulfonate are used for treating hyperphosphatemia and hyperkalaemia in chronic kidney disease patients. Because of their binding properties, these resins potentially bind other drugs in the gastrointestinal tract, thereby decreasing their bioavailability and clinical effectiveness. Aim The aim of this study was to explore co-dispensed drug use in patients on sevelamer or polystyrene sulfonate to identify potential novel binding interactions. Method In this in silico study, the 100 drugs most frequently co-dispensed with sevelamer/polystyrene sulfonate in the period 2000-2018 were extracted from the University Groningen IADB.nl database. Drugs dispensed to < 5% of patients, drugs not orally administered, drugs administered once daily before bedtime and drugs for which information on binding interactions with sevelamer or polystyrene was already available were excluded. The likelihood of an interaction (yes or no) of the included drugs was assessed based on pKa- and Log P values. For sevelamer, drugs with a pKa (acid) between 1.5 and 7.4 and or a Log P value > 2.0 were identified as potential interacting drug. For polystyrene sulfonate, drugs with a pKa (base) > 1.5 were identified as potential interacting drug. Results Of the top 100 drugs most frequently co-dispensed with sevelamer/polystyrene sulfonate, 22 and 27 potentially clinically relevant new interacting drugs were identified for sevelamer and polystyrene sulfonate respectively. Conclusion Several potentially relevant novel binding interactions for sevelamer and polystyrene sulfonate were identified based on dispensing data and assessment of chemical properties for which further interaction research is warranted.
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van Berlo‐van de Laar IR, Prins‐Can I, de Lange AA, Taxis K, Jansman FG. Binding interactions with sevelamer and polystyrene sulfonate in vitro. Pharmacol Res Perspect 2021; 9:e00834. [PMID: 34302439 PMCID: PMC8305432 DOI: 10.1002/prp2.834] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 06/04/2021] [Accepted: 06/15/2021] [Indexed: 11/05/2022] Open
Abstract
This study explored the binding of 28 drugs, which were selected based on frequency of concomitant use and chemical properties, to sevelamer and polystyrene sulfonate in vitro. The relative binding was determined by dissolving the investigated drugs alone (=control), together with 800 mg of sevelamer and 15 g of polystyrene sulfonate at different pH levels (1.5, 5.5, and 7.4), respectively. After incubation at 37℃ and shaking for 60 min, the solutions were diluted and centrifuged, and the drug concentrations were quantified with validated analytical assays. The binding assays were performed in threefold. The mean relative binding (MRB) at each pH level was calculated, with a MRB >20% for at least one pH level to be considered as relevant binding. Fourteen and 23 potentially new binding interactions were identified with sevelamer and polystyrene sulfonate, respectively. These potentially new binding interactions have to be studied in vivo to assess their clinical relevance.
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Affiliation(s)
- Inge R.F. van Berlo‐van de Laar
- Department of Clinical PharmacyDeventer Teaching HospitalDeventerThe Netherlands
- Unit of PharmacoTherapy, Epidemiology & Economics, Groningen Research Institute of Pharmacy (GRIP)University of GroningenGroningenThe Netherlands
| | - Ilona Prins‐Can
- Department of Clinical PharmacyDeventer Teaching HospitalDeventerThe Netherlands
| | - Aliesa A. de Lange
- Unit of PharmacoTherapy, Epidemiology & Economics, Groningen Research Institute of Pharmacy (GRIP)University of GroningenGroningenThe Netherlands
| | - Katja Taxis
- Unit of PharmacoTherapy, Epidemiology & Economics, Groningen Research Institute of Pharmacy (GRIP)University of GroningenGroningenThe Netherlands
| | - Frank G.A. Jansman
- Department of Clinical PharmacyDeventer Teaching HospitalDeventerThe Netherlands
- Unit of PharmacoTherapy, Epidemiology & Economics, Groningen Research Institute of Pharmacy (GRIP)University of GroningenGroningenThe Netherlands
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