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Olney KB, Pai MP, Thomas JK, Burgess DR, Olney WJ, Bruning RA, Griffith KA, Casaus DV, Crance E, Porterfield JZ, Burgess DS. Fixed dose daptomycin: An opportunity for pharmacokinetic/pharmacodynamic optimization in Staphylococcus aureus infections. Pharmacotherapy 2024; 44:615-622. [PMID: 39078247 DOI: 10.1002/phar.4602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2024] [Revised: 06/28/2024] [Accepted: 07/01/2024] [Indexed: 07/31/2024]
Abstract
BACKGROUND Daptomycin is a high-use intravenous antimicrobial agent affording the convenience of once-daily dosing. Prior studies suggest an opportunity to use a more operationally convenient fixed rather than weight-based dosing but this approach has not been studied prospectively. METHODS This study quantified the probability of toxicity and efficacy end points by prospectively testing a fixed dose regimen of daptomycin (750 mg) in obese and non-obese adults. At least, three daptomycin concentrations were measured at steady-state for each patient. A population pharmacokinetic model was constructed to evaluate concentration-time profiles and investigate covariates of daptomycin clearance. Simulations were performed to evaluate the probability of achieving efficacy (24-h area under the curve (AUC0-24) ≥ 666 mg∙h/L) and toxicity (minimum concentration (C min) ≥24.3 mg/L) targets for fixed (500-1000 mg) and weight-based (6-12 mg/kg) daptomycin doses. RESULTS Thirty-one patients (16 females, 15 males) with median (interquartile range (IQR)) age of 50 (30, 62) years and weight of 74 (54, 156) kg were included in the final analysis. Fixed dose daptomycin (750 mg) resulted in similar exposure across weights with a median (IQR) AUC0-24 of 819 (499, 1501) mg∙h/L and 749 (606, 1265) mg∙h/L in patients weighing ≤74 kg and >74 kg, respectively. Overall, male sex and increased kidney function necessitate higher fixed and weight-based doses to achieve efficacy. Creatine phosphokinase elevation was observed in two patients (6.5%) and predicted to be lower with fixed versus weight-based regimens. CONCLUSIONS Fixed daptomycin dosing adjusted for sex and kidney function is expected to improve the efficacy-to-toxicity ratio, transitions of care, and costs compared to weight-based doses. However, no empiric dosing approach is predicted to achieve ≥90% efficacy while minimizing the risk of toxicity, so therapeutic drug monitoring should be considered on a patient-specific basis.
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Affiliation(s)
- Katie B Olney
- Department of Pharmacy, University of Kentucky HealthCare, Lexington, Kentucky, USA
- Department of Pharmacy Practice and Science, The University of Kentucky College of Pharmacy, Lexington, Kentucky, USA
| | - Manjunath P Pai
- Department of Clinical Pharmacy, University of Michigan College of Pharmacy, Ann Arbor, Michigan, USA
| | - Jenni K Thomas
- Department of Pharmacy, University of Kentucky HealthCare, Lexington, Kentucky, USA
| | - Donna R Burgess
- Department of Pharmacy, University of Kentucky HealthCare, Lexington, Kentucky, USA
- Department of Pharmacy Practice and Science, The University of Kentucky College of Pharmacy, Lexington, Kentucky, USA
| | - William J Olney
- Department of Pharmacy, University of Kentucky HealthCare, Lexington, Kentucky, USA
- Department of Pharmacy Practice and Science, The University of Kentucky College of Pharmacy, Lexington, Kentucky, USA
| | - Rebecca A Bruning
- Department of Pharmacy, University of Kentucky HealthCare, Lexington, Kentucky, USA
| | - Kamron A Griffith
- Department of Pharmacy, University of Kentucky HealthCare, Lexington, Kentucky, USA
| | - Danielle V Casaus
- Department of Pharmacy, University of Kentucky HealthCare, Lexington, Kentucky, USA
| | - Elizabeth Crance
- Division of Infectious Diseases, University of Kentucky HealthCare, Lexington, Kentucky, USA
| | - James Z Porterfield
- Division of Infectious Diseases, University of Kentucky HealthCare, Lexington, Kentucky, USA
- University of KwaZulu-Natal School of Clinical Medicine, Durban, South Africa
| | - David S Burgess
- Department of Pharmacy Practice and Science, The University of Kentucky College of Pharmacy, Lexington, Kentucky, USA
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De Gregori S, Seminari E, Capone M, Giordani P, Bruno R, De Silvestri A. Daptomycin Exposure Prediction With a Limited Sampling Strategy. Ther Drug Monit 2024; 46:537-542. [PMID: 38666474 DOI: 10.1097/ftd.0000000000001211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Accepted: 02/28/2024] [Indexed: 07/12/2024]
Abstract
BACKGROUND Daptomycin is a cyclic lipopeptide antibiotic used to treat serious infectious endocarditis caused by Staphylococcus aureus . The pharmacodynamic parameter correlating best with efficacy is the ratio of the estimated area under the concentration (AUC 0-24 )-time curve to the minimum inhibitory concentration. The aim of the study is to develop a limited sampling strategy to estimate AUC 0-24 using a reduced number of samples. METHODS Sixty-eight daptomycin AUC 0-24 values were calculated for 50 White patients who underwent treatment for at least 5 consecutive days. Plasma concentrations were detected using a validated high-performance liquid chromatography-tandem mass spectrometry analytical method, with daptomycin-d5 as an internal standard. Multiple regression was used to evaluate the ability of 2 concentration-time points to predict the AUC 0-24 calculated from the entire pharmacokinetic profile. Prediction bias was calculated as the mean prediction error, whereas prediction precision was estimated as the mean absolute prediction error. The development and validation datasets comprised 40 and 10 randomly selected patients, respectively. RESULTS The AUC 0-24 (mg*h/L) was best estimated using the daptomycin trough concentration and plasma concentrations detected 2 hours after dosing. We calculated a mean prediction error of 1.6 (95% confidence interval, -10.7 to 10.9) and a mean absolute prediction error of 11.8 (95% confidence interval, 5.3-18.3), with 73% of prediction errors within ±15%. CONCLUSIONS An equation was developed to estimate daptomycin exposure (AUC 0-24 ), offering clinical applicability and utility in generating personalized dosing regimens, especially for individuals at high risk of treatment failure or delayed response.
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Affiliation(s)
- Simona De Gregori
- Department of Diagnostic Medicine and Services: Laboratory Medicine-Clinical and Experimental Pharmacokinetics Unit, Fondazione IRCCS Policlinico, San Matteo, Pavia, Italy
| | - Elena Seminari
- Division of Infectious Diseases I, Fondazione IRCCS Policlinico, San Matteo, Pavia, Italy; and
| | - Mara Capone
- Department of Diagnostic Medicine and Services: Laboratory Medicine-Clinical and Experimental Pharmacokinetics Unit, Fondazione IRCCS Policlinico, San Matteo, Pavia, Italy
| | - Paola Giordani
- Division of Infectious Diseases I, Fondazione IRCCS Policlinico, San Matteo, Pavia, Italy; and
| | - Raffaele Bruno
- Division of Infectious Diseases I, Fondazione IRCCS Policlinico, San Matteo, Pavia, Italy; and
| | - Annalisa De Silvestri
- SSD Biostatistics and Clinical Trial Center, Fondazione IRCCS Policlinico, San Matteo, Pavia, Italy
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Russo A, Serraino R, Serapide F, Trecarichi EM, Torti C. New advances in management and treatment of cardiac implantable electronic devices infections. Infection 2024; 52:323-336. [PMID: 37996646 PMCID: PMC10955036 DOI: 10.1007/s15010-023-02130-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Accepted: 10/30/2023] [Indexed: 11/25/2023]
Abstract
Cardiac implantable electronic devices (CIED) are increasingly used worldwide, and infection of these devices remains one of the most feared complications.CIED infections (CDIs) represent a challenge for physicians and the healthcare system in general as they require prolonged hospitalization and antibiotic treatment and are burdened by high mortality and high costs, so management of CDIs must be multidisciplinary.The exact incidence of CDIs is difficult to define, considering that it is influenced by various factors mainly represented by the implanted device and the type of procedure. Risk factors for CDIs could be divided into three categories: device related, patient related, and procedural related and the etiology is mainly sustained by Gram-positive bacteria; however, other etiologies cannot be underestimated. As a matter of fact, the two cornerstones in the treatment of these infections are device removal and antimicrobial treatment. Finally, therapeutic drug monitoring and PK/PD correlations should be encouraged in all patients with CDIs receiving antibiotic therapy and may result in a better clinical outcome and a reduction in antibiotic resistance and economic costs.In this narrative review, we look at what is new in the management of these difficult-to-treat infections.
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Affiliation(s)
- Alessandro Russo
- Infectious and Tropical Disease Unit, Department of Medical and Surgical Sciences, 'Magna Graecia' University of Catanzaro, Viale Europa, 88100, Catanzaro, Italy.
| | - Riccardo Serraino
- Infectious and Tropical Disease Unit, Department of Medical and Surgical Sciences, 'Magna Graecia' University of Catanzaro, Viale Europa, 88100, Catanzaro, Italy
| | - Francesca Serapide
- Infectious and Tropical Disease Unit, Department of Medical and Surgical Sciences, 'Magna Graecia' University of Catanzaro, Viale Europa, 88100, Catanzaro, Italy
| | - Enrico Maria Trecarichi
- Infectious and Tropical Disease Unit, Department of Medical and Surgical Sciences, 'Magna Graecia' University of Catanzaro, Viale Europa, 88100, Catanzaro, Italy
| | - Carlo Torti
- Infectious and Tropical Disease Unit, Department of Medical and Surgical Sciences, 'Magna Graecia' University of Catanzaro, Viale Europa, 88100, Catanzaro, Italy
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Angelini J, Liu S, Giuliano S, Flammini S, Martini L, Tascini C, Baraldo M, Pai MP. Revolutionizing Daptomycin Dosing: A Single 7-11 Hour Sample for Pragmatic Application. Clin Infect Dis 2024:ciae178. [PMID: 38552199 DOI: 10.1093/cid/ciae178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 03/10/2024] [Accepted: 03/12/2024] [Indexed: 06/19/2024] Open
Abstract
Precision daptomycin dosing faces clinical implementation barriers despite known exposure-safety concerns with the use of twice the regulatory-approved doses. We propose achieving a single 7-11 hour post-dose plasma target concentration of 30 mg/L to 43 mg/L to be a practical starting point to facilitate precision daptomycin dosing.
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Affiliation(s)
- Jacopo Angelini
- Clinical Pharmacology and Toxicology Institute, University Hospital Friuli Centrale ASUFC, 33100 Udine, Italy
- Department of Medicine (DMED), University of Udine (UNIUD), 33100 Udine, Italy
| | - Shuhan Liu
- Department of Clinical Pharmacy, College of Pharmacy, University of Michigan, Ann Arbor, Michigan, USA
| | - Simone Giuliano
- Infectious Diseases Division, Department of Medicine, University of Udine and Azienda Sanitaria Universitaria Friuli Centrale, 33100 Udine, Italy
| | - Sarah Flammini
- Infectious Diseases Division, Department of Medicine, University of Udine and Azienda Sanitaria Universitaria Friuli Centrale, 33100 Udine, Italy
| | - Luca Martini
- Infectious Diseases Division, Department of Medicine, University of Udine and Azienda Sanitaria Universitaria Friuli Centrale, 33100 Udine, Italy
| | - Carlo Tascini
- Infectious Diseases Division, Department of Medicine, University of Udine and Azienda Sanitaria Universitaria Friuli Centrale, 33100 Udine, Italy
| | - Massimo Baraldo
- Clinical Pharmacology and Toxicology Institute, University Hospital Friuli Centrale ASUFC, 33100 Udine, Italy
- Department of Medicine (DMED), University of Udine (UNIUD), 33100 Udine, Italy
| | - Manjunath P Pai
- Department of Clinical Pharmacy, College of Pharmacy, University of Michigan, Ann Arbor, Michigan, USA
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Ngougni Pokem P, Liu X, Parker SL, Verroken A, Collienne C, Finet P, Wijnant GJ, Laterre PF, Roberts JA, Van Bambeke F, Wittebole X. Population pharmacokinetics and dosing simulations of total and unbound temocillin in the plasma and CSF of neurocritically ill patients with external ventricular drain-related cerebral ventriculitis. J Antimicrob Chemother 2024; 79:429-442. [PMID: 38153240 DOI: 10.1093/jac/dkad398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2023] [Accepted: 12/12/2023] [Indexed: 12/29/2023] Open
Abstract
BACKGROUND Cerebral ventriculitis might be caused by Gram-negative bacteria, including ESBL producers. Temocillin may be a useful treatment option in this scenario; however, no consistent data are available regarding its penetration into the CSF. OBJECTIVES To describe the population pharmacokinetics of temocillin in plasma and CSF and to determine the probability for different simulated dosing regimens to achieve pharmacokinetic/pharmacodynamic (PK/PD) targets in the CSF. METHODS Ten post-neurosurgical critically ill adult patients requiring continuous drainage of CSF were included in this monocentric, prospective, open-label, non-randomized study. They received 2 g loading dose temocillin over 30 min IV infusion, followed by a 6 g continuous infusion over 24 h. Total and unbound concentrations were measured in plasma (n = 88 and 86) and CSF (n = 88 and 88) samples and used to build a population PK model. Monte Carlo simulations were performed to estimate the PTA at 100% Css>MIC (steady state concentration above the MIC) in CSF. RESULTS All patients were infected with Enterobacterales with temocillin MICs ≤8 mg/L. The median (min-max) temocillin penetration in CSF was 12.1% (4.3-25.5) at steady state. Temocillin unbound plasma pharmacokinetics were best described by a one-compartment model. PTA for the applied dosing regimen was >90% for bacteria with MIC ≤ 4 mg/L. CONCLUSIONS The currently approved dose of 6 g by continuous infusion may be adequate for the treatment of ventriculitis by Enterobacterales with MIC ≤ 4 mg/L if considering 100% Css>MIC as the PK/PD target to reach. Higher maintenance doses could help covering higher MICs, but their safety would need to be assessed.
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Affiliation(s)
- Perrin Ngougni Pokem
- Pharmacologie cellulaire et moléculaire, Louvain Drug Research Institute, Université catholique de Louvain, Avenue E. Mounier 73/B1.73.05, B-1200, Brussels, Belgium
| | - Xin Liu
- University of Queensland Centre for Clinical Research, Faculty of Medicine, The University of Queensland, Brisbane, Australia
| | - Suzanne L Parker
- University of Queensland Centre for Clinical Research, Faculty of Medicine, The University of Queensland, Brisbane, Australia
| | - Alexia Verroken
- Clinical Microbiology Department, Cliniques universitaires Saint-Luc, Université catholique de Louvain, Brussels, Belgium
| | - Christine Collienne
- Department of Critical Care Medicine, Cliniques universitaires St Luc, Université catholique de Louvain, Brussels, Belgium
| | - Patrice Finet
- Department of Neurosurgery, Cliniques universitaires St Luc, Université catholique de Louvain, Brussels, Belgium
| | - Gert-Jan Wijnant
- Pharmacologie cellulaire et moléculaire, Louvain Drug Research Institute, Université catholique de Louvain, Avenue E. Mounier 73/B1.73.05, B-1200, Brussels, Belgium
| | - Pierre-François Laterre
- University of Queensland Centre for Clinical Research, Faculty of Medicine, The University of Queensland, Brisbane, Australia
| | - Jason A Roberts
- University of Queensland Centre for Clinical Research, Faculty of Medicine, The University of Queensland, Brisbane, Australia
- Herston Infectious Diseases Institute (HeIDI), Metro North Health, Brisbane, Australia
- Departments of Pharmacy and Intensive Care Medicine, Royal Brisbane and Women's Hospital, Brisbane, Australia
- Division of Anaesthesiology Critical Care Emergency and Pain Medicine, Nîmes University Hospital, University of Montpellier, Nîmes, France
| | - Françoise Van Bambeke
- Pharmacologie cellulaire et moléculaire, Louvain Drug Research Institute, Université catholique de Louvain, Avenue E. Mounier 73/B1.73.05, B-1200, Brussels, Belgium
| | - Xavier Wittebole
- University of Queensland Centre for Clinical Research, Faculty of Medicine, The University of Queensland, Brisbane, Australia
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Bradley N, Ng K. Evaluation of Real-World Vancomycin Dosing and Attainment of Therapeutic Drug Monitoring Targets. PHARMACY 2023; 11:95. [PMID: 37368421 DOI: 10.3390/pharmacy11030095] [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: 03/08/2023] [Revised: 05/08/2023] [Accepted: 06/02/2023] [Indexed: 06/28/2023] Open
Abstract
In 2020, the Infectious Diseases Society of America (IDSA) recommended a change in vancomycin therapeutic drug monitoring from trough-based to AUC/MIC-based to optimize vancomycin's efficacy and reduce nephrotoxicity. Many hospitals have not implemented this change due to barriers such as the cost of AUC/MIC software and lack of provider familiarity. The purpose of this study was to determine the rate of AUC/MIC ratio target attainment using current trough-based vancomycin dosing practices at a city hospital. The rates of acute kidney injury (AKI) were also evaluated. Vancomycin orders were reviewed retrospectively to determine the expected AUC/MIC ratios using first-order pharmacokinetic equations over a 7-month period. Orders were excluded if they were written for a one-time dose, for individuals less than 18 years of age, or for those on hemodialysis. A total of 305 vancomycin orders were included in this review. Overall, 27.9% (85/305) of vancomycin orders attained the AUC/MIC ratio target of 400-600 mg·h/L as recommended by the guidelines. Nearly 35% (106/305) achieved AUC/MIC ratios below 400 mg·h/L and 37.4% (114/305) achieved AUC/MIC ratios above 600 mg·h/L. Orders for obese patients were significantly more likely to have below the target AUC/MIC ratios (68% vs. 23.9%, X2 48.48, p < 0.00001) and non-obese patients were significantly more likely to have above the target AUC/MIC ratios (45.7% vs. 12%, X2 27.36, p < 0.00001). The overall rate of acute kidney injury observed was 2.6%. Most vancomycin orders did not attain therapeutic drug monitoring targets, reflecting the ongoing clinical challenge of optimizing vancomycin doses and implementing new guideline recommendations.
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Affiliation(s)
- Nicole Bradley
- College of Pharmacy and Health Sciences, St. John's University, Queens, NY 11439, USA
| | - Kimberly Ng
- College of Pharmacy and Health Sciences, St. John's University, Queens, NY 11439, USA
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Sujjavorakul K, Katip W, Kerr SJ, Wacharachaisurapol N, Puthanakit T. Predicting the Area under the Plasma Concentration-Time Curve (AUC) for First Dose Vancomycin Using First-Order Pharmacokinetic Equations. Antibiotics (Basel) 2023; 12:antibiotics12040630. [PMID: 37106993 PMCID: PMC10135334 DOI: 10.3390/antibiotics12040630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 03/15/2023] [Accepted: 03/21/2023] [Indexed: 04/29/2023] Open
Abstract
To treat critically ill patients, early achievement of the target area under the plasma concentration-time curve/minimum inhibitory concentration (AUC/MIC) in the first 24 h is recommended. However, accurately calculating the AUC before steady state is an obstacle to this goal. A first-order pharmacokinetic equation to calculate vancomycin AUC after a first dose of vancomycin has never been studied. We sought to estimate AUC using two first-order pharmacokinetic equations, with different paired concentration time points, and to compare these to the actual first dose vancomycin AUC calculated by the linear-log trapezoid rule as a reference. The equations were validated using two independent intensive first dose vancomycin concentration time data sets, one from 10 adults and another from 14 children with severe infection. The equation with compensation for the alpha distribution phase using a first vancomycin serum concentration from 60 to 90 min and the second concentration from 240 to 300 min after the completed infusion showed good agreement and low bias of calculated AUC, with mean differences <5% and Lin's correlation coefficient >0.96. Moreover, it gave an excellent correlation with Pearson's r > 0.96. Estimating the first dose vancomycin AUC calculated using this first-order pharmacokinetic equation is both reliable and reproducible in clinical practice settings.
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Affiliation(s)
- Kritsaporn Sujjavorakul
- Department of Pediatrics, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand
- Critical Care Excellence Center, King Chulalongkorn Memorial Hospital, Bangkok 10330, Thailand
| | - Wasan Katip
- Department of Pharmaceutical Care, Faculty of Pharmacy, Chiang Mai University, Chiang Mai 50200, Thailand
- Epidemiology Research Group of Infectious Disease (ERGID), Chiang Mai University, Chiang Mai 50200, Thailand
| | - Stephen J Kerr
- Biostatistics Centre, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand
- The Kirby Institute, The University of New South Wales, Kensington, NSW 2052, Australia
- HIV-NAT, The Thai Red Cross AIDS Research Centre, Bangkok 10330, Thailand
| | - Noppadol Wacharachaisurapol
- Center of Excellence in Clinical Pharmacokinetics and Pharmacogenomics, Department of Pharmacology, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand
- Center of Excellence for Pediatric Infectious Diseases and Vaccines, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand
| | - Thanyawee Puthanakit
- Department of Pediatrics, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand
- Center of Excellence for Pediatric Infectious Diseases and Vaccines, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand
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Cairns KA, Abbott IJ, Dooley MJ, Peleg AY, Peel TN, Udy AA. The impact of daptomycin therapeutic drug monitoring on clinical outcomes: a systematic review. Int J Antimicrob Agents 2023; 61:106712. [PMID: 36640849 DOI: 10.1016/j.ijantimicag.2023.106712] [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: 07/19/2022] [Revised: 11/25/2022] [Accepted: 01/03/2023] [Indexed: 01/13/2023]
Abstract
AIM Daptomycin therapeutic drug monitoring (TDM) is a potentially valuable intervention for a relatively new drug. The aim of this study was to determine whether daptomycin TDM, including dose adjustment where necessary, improves the clinical outcomes of adult patients with Gram-positive infections. METHODS A systematic review of English-language studies in MEDLINE (Ovid MEDLINE and Epub Ahead of Print, In-process, In-Data-Review & Other Non-Indexed Citations, Daily and Versions), EMBASE via OVID, Cochrane Central Register of Controlled Trials via the OVID platform, Scopus and Web of Science online databases was performed and conducted in accordance with Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. There was no discrimination on study type or time of publication. STUDY SELECTION Adults (age ≥18 years) with a Gram-positive infection requiring treatment with daptomycin who received TDM, with subsequent reporting of serum concentrations and dose adjustment where necessary, were included. RESULTS In total, 2869 studies were identified, of which nine met the inclusion criteria. No studies of daptomycin TDM including a relevant control arm have been published to date. All of the included studies were single-arm observational cohort studies. Broad heterogeneity was observed between the studies in terms of included pathogens, infection types, daptomycin TDM practices, reported clinical outcomes, and reporting of potential confounders. CONCLUSIONS No studies exploring the efficacy of routine daptomycin TDM on patient-centred outcomes in comparison with fixed dosing regimens have been published to date. This represents a key knowledge gap as opposed to an inherent lack of efficacy. Further well-designed, comparative studies are required to determine the role of daptomycin TDM in patients with Gram-positive infections.
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Affiliation(s)
- Kelly A Cairns
- Department of Infectious Diseases, The Alfred and Central Clinical School, Monash University, Melbourne, VIC, Australia; Pharmacy Department, Alfred Health, Melbourne, VIC, Australia
| | - Iain J Abbott
- Department of Infectious Diseases, The Alfred and Central Clinical School, Monash University, Melbourne, VIC, Australia; Microbiology Unit, Alfred Health, Melbourne, VIC, Australia
| | - Michael J Dooley
- Pharmacy Department, Alfred Health, Melbourne, VIC, Australia; Centre for Medicines Use and Safety, Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, Parkville, VIC, Australia
| | - Anton Y Peleg
- Department of Infectious Diseases, The Alfred and Central Clinical School, Monash University, Melbourne, VIC, Australia; Infection and Immunity Program, Monash Biomedicine Discovery Institute, Department of Microbiology, Monash University, Clayton, VIC, Australia
| | - Trisha N Peel
- Department of Infectious Diseases, The Alfred and Central Clinical School, Monash University, Melbourne, VIC, Australia
| | - Andrew A Udy
- Australian and New Zealand Intensive Care Research Centre, School of Public Health and Preventive Medicine, Monash University, Melbourne, VIC, Australia; Department of Intensive Care and Hyperbaric Medicine, The Alfred, Melbourne, VIC, Australia.
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Ngougni Pokem P, Wittebole X, Collienne C, Rodriguez-Villalobos H, Tulkens PM, Elens L, Van Bambeke F, Laterre PF. Population Pharmacokinetics of Temocillin Administered by Continuous Infusion in Patients with Septic Shock Associated with Intra-Abdominal Infection and Ascitic Fluid Effusion. Antibiotics (Basel) 2022; 11:898. [PMID: 35884152 PMCID: PMC9311849 DOI: 10.3390/antibiotics11070898] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 06/16/2022] [Accepted: 06/30/2022] [Indexed: 02/04/2023] Open
Abstract
Temocillin is active against Gram-negative bacteria, including many extended-spectrum β-lactamase (ESBL)-producing Enterobacterales. We studied its pharmacokinetics in plasma and ascitic fluid after intravenous administration of a loading dose of 2 g over 30 min, followed by continuous infusion of 6 g/24 h, to 19 critically-ill patients with septic shock associated with complicated intra-abdominal infection. We established a pharmacokinetic model describing unbound temocillin concentrations in plasma and ascitic fluid and performed Monte-Carlo simulations to evaluate the probability of target attainment (PTA) of unbound concentrations (100% fT > MIC, i.e., unbound concentrations remaining above the MIC during 100% of the time) for the applied and hypothetical dosing regimens. The temocillin AUC in ascitic fluid was 46% of the plasma AUC. Plasma unbound concentrations were best described by a two-compartment model, and an additional compartment was added to describe unbound concentration in ascitic fluid, with renal clearance as a covariate. Dosing simulations showed that 90% PTA was achieved in the plasma with the current dosing regimen for MIC ≤ 16 mg/L (EUCAST susceptibility breakpoint) but not in the ascitic fluid if renal clearance was ≥40 mL/min. Hypothetical dosing with a higher (a) loading dose or (b) infused dose allowed to reach target concentrations in ascitic fluid (a) more rapidly or (b) sustainably, but these simulations need to be evaluated in the clinics for safety and efficacy.
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Affiliation(s)
- Perrin Ngougni Pokem
- Pharmacologie Cellulaire et Moléculaire, Louvain Drug Research Institute, Université Catholique de Louvain, 1200 Brussels, Belgium; (P.N.P.); (P.M.T.)
- Integrated PharmacoMetrics, PharmacoGenomics and PharmacoKinetics, Louvain Drug Research Institute, Université Catholique de Louvain, 1200 Brussels, Belgium;
| | - Xavier Wittebole
- Department of Critical Care Medicine, Cliniques Universitaires Saint-Luc, Université Catholique de Louvain, 1200 Brussels, Belgium; (X.W.); (C.C.); (P.-F.L.)
| | - Christine Collienne
- Department of Critical Care Medicine, Cliniques Universitaires Saint-Luc, Université Catholique de Louvain, 1200 Brussels, Belgium; (X.W.); (C.C.); (P.-F.L.)
| | | | - Paul M. Tulkens
- Pharmacologie Cellulaire et Moléculaire, Louvain Drug Research Institute, Université Catholique de Louvain, 1200 Brussels, Belgium; (P.N.P.); (P.M.T.)
| | - Laure Elens
- Integrated PharmacoMetrics, PharmacoGenomics and PharmacoKinetics, Louvain Drug Research Institute, Université Catholique de Louvain, 1200 Brussels, Belgium;
| | - Françoise Van Bambeke
- Pharmacologie Cellulaire et Moléculaire, Louvain Drug Research Institute, Université Catholique de Louvain, 1200 Brussels, Belgium; (P.N.P.); (P.M.T.)
| | - Pierre-François Laterre
- Department of Critical Care Medicine, Cliniques Universitaires Saint-Luc, Université Catholique de Louvain, 1200 Brussels, Belgium; (X.W.); (C.C.); (P.-F.L.)
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Chang J, Patel D, Vega A, Claeys KC, Heil EL, Scheetz MH. Does calculation method matter for targeting vancomycin area under the curve? J Antimicrob Chemother 2022; 77:2245-2250. [PMID: 35640658 PMCID: PMC9890897 DOI: 10.1093/jac/dkac151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 04/13/2022] [Indexed: 02/04/2023] Open
Abstract
OBJECTIVES To assess differences in vancomycin AUC estimates from two common, clinically applied first-order pharmacokinetic equation methods compared with Bayesian estimates. METHODS A cohort of patients who received vancomycin and therapeutic drug monitoring was studied. First-order population pharmacokinetic equations were used to guide initial empirical dosing. After receipt of the first dose, patients had peak and trough serum levels drawn and steady-state AUC was estimated using first-order pharmacokinetic equations as standard care. We subsequently created a Bayesian model and used individual Empirical Bayes Estimates to precisely calculate vancomycin AUC24-48, AUC48-72 and AUC72-96 in this cohort. AUC at steady state (AUCSS) differences from the first-order methods were compared numerically and categorically (i.e. below, within or above 400-600 mg·h/L) to Bayesian AUCs, which served as the gold standard. RESULTS A total of 65 adult inpatients with 409 plasma samples were included in this analysis. A two-compartment intravenous infusion model with first-order elimination fit the data well. The mean of Bayesian AUC24-48 was not significantly different from AUC estimates from the two first-order pharmacokinetic equation methods (P = 0.68); however, Bayesian AUC48-72 and Bayesian AUC72-96 were both significantly different when compared with both first-order pharmacokinetic equation methods (P < 0.01 for each). At the patient level, categorical classifications of AUC estimates from the two first-order pharmacokinetic equation methods differed from categorizations derived from the Bayesian calculations. Categorical agreement was ∼50% between first-order and Bayesian calculations, with declining categorical agreement observed with longer treatment courses. Differences in categorical agreement between calculation methods could potentially result in different dose recommendations for the patient. CONCLUSIONS Bayesian-calculated AUCs between 48-72 and 72-96 h intervals were significantly different from first-order pharmacokinetic method-estimated AUCs at steady state. The various calculation methods resulted in different categorical classification, which could potentially lead to erroneous dosing adjustments in approximately half of the patients.
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Affiliation(s)
- Jack Chang
- Midwestern University College of Pharmacy, Department of Pharmacy Practice, Downers Grove, IL, USA
- Midwestern University College of Pharmacy, Pharmacometrics Center of Excellence, Downers Grove, IL, USA
- Northwestern Memorial Hospital, Department of Pharmacy, Chicago, IL, USA
| | - Dhara Patel
- Midwestern University College of Pharmacy, Department of Pharmacy Practice, Downers Grove, IL, USA
| | - Ana Vega
- Jackson Memorial Hospital, Department of Pharmacy, Miami, FL, USA
| | - Kimberly C Claeys
- University of Maryland School of Pharmacy, Department of Pharmacy Practice and Science, Baltimore, MD, USA
| | - Emily L Heil
- University of Maryland School of Pharmacy, Department of Pharmacy Practice and Science, Baltimore, MD, USA
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11
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Xiao Q, Zhang H, Wu X, Qu J, Qin L, Wang C. Augmented Renal Clearance in Severe Infections-An Important Consideration in Vancomycin Dosing: A Narrative Review. Front Pharmacol 2022; 13:835557. [PMID: 35387348 PMCID: PMC8979486 DOI: 10.3389/fphar.2022.835557] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 02/25/2022] [Indexed: 12/15/2022] Open
Abstract
Vancomycin is a hydrophilic antibiotic widely used in severe infections, including bacteremia and central nervous system (CNS) infections caused by Gram-positive bacteria such as methicillin-resistant Staphylococcus aureus (MRSA), coagulase-negative staphylococci and enterococci. Appropriate antimicrobial dosage regimens can help achieve the target exposure and improve clinical outcomes. However, vancomycin exposure in serum and cerebrospinal fluid (CSF) is challenging to predict due to rapidly changing pathophysiological processes and patient-specific factors. Vancomycin concentrations may be decreased for peripheral infections due to augmented renal clearance (ARC) and increased distribution caused by systemic inflammatory response syndrome (SIRS), increased capillary permeability, and aggressive fluid resuscitation. Additionally, few studies on vancomycin’s pharmacokinetics (PK) in CSF for CNS infections. The relationship between exposure and clinical response is unclear, challenging for adequate antimicrobial therapy. Accurate prediction of vancomycin pharmacokinetics/pharmacodynamics (PK/PD) in patients with high interindividual variation is critical to increase the likelihood of achieving therapeutic targets. In this review, we describe the interaction between ARC and vancomycin PK/PD, patient-specific factors that influence the achievement of target exposure, and recent advances in optimizing vancomycin dosing schedules for severe infective patients with ARC.
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Affiliation(s)
- Qile Xiao
- Department of Neurology, Second Xiangya Hospital, Central South University, Changsha, China
| | - Hainan Zhang
- Department of Neurology, Second Xiangya Hospital, Central South University, Changsha, China
| | - Xiaomei Wu
- Department of Neurology, Second Xiangya Hospital, Central South University, Changsha, China
| | - Jian Qu
- Department of Pharmacy, Second Xiangya Hospital, Central South University, Changsha, China
| | - Lixia Qin
- Department of Neurology, Second Xiangya Hospital, Central South University, Changsha, China
| | - Chunyu Wang
- Department of Neurology, Second Xiangya Hospital, Central South University, Changsha, China
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12
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Abdul-Aziz MH, Brady K, Cotta MO, Roberts JA. Therapeutic Drug Monitoring of Antibiotics: Defining the Therapeutic Range. Ther Drug Monit 2022; 44:19-31. [PMID: 34750338 DOI: 10.1097/ftd.0000000000000940] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 09/30/2021] [Indexed: 11/26/2022]
Abstract
PURPOSE In the present narrative review, the authors aimed to discuss the relationship between the pharmacokinetic/pharmacodynamic (PK/PD) of antibiotics and clinical response (including efficacy and toxicity). In addition, this review describes how this relationship can be applied to define the therapeutic range of a particular antibiotic (or antibiotic class) for therapeutic drug monitoring (TDM). METHODS Relevant clinical studies that examined the relationship between PK/PD of antibiotics and clinical response (efficacy and response) were reviewed. The review (performed for studies published in English up to September 2021) assessed only commonly used antibiotics (or antibiotic classes), including aminoglycosides, beta-lactam antibiotics, daptomycin, fluoroquinolones, glycopeptides (teicoplanin and vancomycin), and linezolid. The best currently available evidence was used to define the therapeutic range for these antibiotics. RESULTS The therapeutic range associated with maximal clinical efficacy and minimal toxicity is available for commonly used antibiotics, and these values can be implemented when TDM for antibiotics is performed. Additional data are needed to clarify the relationship between PK/PD indices and the development of antibiotic resistance. CONCLUSIONS TDM should only be regarded as a means to achieve the main goal of providing safe and effective antibiotic therapy for all patients. The next critical step is to define exposures that can prevent the development of antibiotic resistance and include these exposures as therapeutic drug monitoring targets.
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Affiliation(s)
- Mohd H Abdul-Aziz
- University of Queensland Centre for Clinical Research (UQCCR), Faculty of Medicine, The University of Queensland, Brisbane, Australia
| | - Kara Brady
- Adult Intensive Care Unit and Pharmacy, The Prince Charles Hospital, Brisbane, Australia
| | - Menino Osbert Cotta
- University of Queensland Centre for Clinical Research (UQCCR), Faculty of Medicine, The University of Queensland, Brisbane, Australia
| | - Jason A Roberts
- University of Queensland Centre for Clinical Research (UQCCR), Faculty of Medicine, The University of Queensland, Brisbane, Australia
- Departments of Intensive Care Medicine and Pharmacy, Royal Brisbane and Women's Hospital, Brisbane, Australia; and
- Division of Anaesthesiology Critical Care Emergency and Pain Medicine, Nîmes University Hospital, University of Montpellier, Nîmes, France
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13
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Cole JL, O'Glee R, Clark M, White M. Transitioning From Consult-Based to Automatic Pharmacy-Driven Vancomycin Management: Results From a Single, Primary Care Center. J Pharm Pract 2021; 35:730-737. [PMID: 33813939 DOI: 10.1177/08971900211004180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE The transition to area under the curve (AUC) vancomycin monitoring requires substantial updates in pharmacy policies and procedures. The study facility was tasked with transitioning from a consult-based collaborative agreement to an automatic pharmacist management policy on all intravenous (IV) vancomycin orders. The purpose of this quality assessment (QA) study was to evaluate the effectiveness of this transition. METHODS The primary outcome was the proportion of patients with pharmacist assessment of pharmacokinetics and dosing with documentation in IV vancomycin treated patients from January-June 2020. Secondary outcomes included the proportion of AUC24 levels within therapeutic range, the incidence of acute kidney injury (AKI) and treatment failures in patients treated ≥72 hours compared to a historical, trough-based cohort. RESULTS There were 88 patients in the QA analysis with 100% having a pharmacist assessment with documentation. There were 34 patients treated ≥72 hours in the AUC group, 36 in the trough-based group. AUC24 fell within desired range in 45% of monitored patients. Rates of AKI (9% vs 11%, p = 0.75) and treatment failures were similar (3% vs 0%, p = 0.3). CONCLUSION The transition from consult-based to an automatic pharmacy management agreement was successful with similar safety and efficacy compared to a historical trough-based cohort.
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Affiliation(s)
- Jennifer L Cole
- Department of Pharmacy, Veterans Healthcare System of the Ozarks, Fayetteville, AR, USA
| | - Russell O'Glee
- Department of Pharmacy, Veterans Healthcare System of the Ozarks, Fayetteville, AR, USA
| | - Michael Clark
- Department of Pharmacy, Veterans Healthcare System of the Ozarks, Fayetteville, AR, USA
| | - Meredith White
- Department of Pharmacy, Veterans Healthcare System of the Ozarks, Fayetteville, AR, USA
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14
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Gregoire N, Chauzy A, Buyck J, Rammaert B, Couet W, Marchand S. Clinical Pharmacokinetics of Daptomycin. Clin Pharmacokinet 2020; 60:271-281. [PMID: 33313994 DOI: 10.1007/s40262-020-00968-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/09/2020] [Indexed: 11/26/2022]
Abstract
Due to the low level of resistance observed with daptomycin, this antibiotic has an important place in the treatment of severe Gram-positive infections. It is the first-in-class of the group of calcium-dependent, membrane-binding lipopeptides, and is a cyclic peptide constituted of 13 amino acids and an n-decanoyl fatty acid chain. The antibacterial action of daptomycin requires its complexation with calcium. Daptomycin is not absorbed from the gastrointestinal tract and needs to be administered parenterally. The distribution of daptomycin is limited (volume of distribution of 0.1 L/kg in healthy volunteers) due to its negative charge at physiological pH and its high binding to plasma proteins (about 90%). Its elimination is mainly renal, with about 50% of the dose excreted unchanged in the urine, justifying dosage adjustment for patients with renal insufficiency. The pharmacokinetics of daptomycin are altered under certain pathophysiological conditions, resulting in high interindividual variability. As a result, therapeutic drug monitoring of daptomycin may be of interest for certain patients, such as intensive care unit patients, patients with renal or hepatic insufficiency, dialysis patients, obese patients, or children. A target for the ratio of the area under the curve to the minimum inhibitory concentration > 666 is usually recommended for clinical efficacy, whereas in order to limit the risk of undesirable muscular effects the residual concentration should not exceed 24.3 mg/L.
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Affiliation(s)
- Nicolas Gregoire
- INSERM, U1070, UFR de Médecine Pharmacie, Université de Poitiers, 1 rue Georges Bonnet, TSA 51106, 86073, Poitiers Cedex 9, France
- Laboratoire de Toxicologie-Pharmacocinétique, CHU of Poitiers, 2 rue de la Miletrie, 86000, Poitiers, France
| | - Alexia Chauzy
- INSERM, U1070, UFR de Médecine Pharmacie, Université de Poitiers, 1 rue Georges Bonnet, TSA 51106, 86073, Poitiers Cedex 9, France
| | - Julien Buyck
- INSERM, U1070, UFR de Médecine Pharmacie, Université de Poitiers, 1 rue Georges Bonnet, TSA 51106, 86073, Poitiers Cedex 9, France
| | - Blandine Rammaert
- INSERM, U1070, UFR de Médecine Pharmacie, Université de Poitiers, 1 rue Georges Bonnet, TSA 51106, 86073, Poitiers Cedex 9, France
- Service de maladies infectieuses et tropicales, CHU of Poitiers, 2 rue de la Miletrie, 86000, Poitiers, France
| | - William Couet
- INSERM, U1070, UFR de Médecine Pharmacie, Université de Poitiers, 1 rue Georges Bonnet, TSA 51106, 86073, Poitiers Cedex 9, France.
- Laboratoire de Toxicologie-Pharmacocinétique, CHU of Poitiers, 2 rue de la Miletrie, 86000, Poitiers, France.
| | - Sandrine Marchand
- INSERM, U1070, UFR de Médecine Pharmacie, Université de Poitiers, 1 rue Georges Bonnet, TSA 51106, 86073, Poitiers Cedex 9, France
- Laboratoire de Toxicologie-Pharmacocinétique, CHU of Poitiers, 2 rue de la Miletrie, 86000, Poitiers, France
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15
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Efficacy of Daptomycin-Containing Regimen for Treatment of Staphylococcal or Enterococcal Vertebral Osteomyelitis: A Prospective Clinical Experience. Antibiotics (Basel) 2020; 9:antibiotics9120889. [PMID: 33321967 PMCID: PMC7764531 DOI: 10.3390/antibiotics9120889] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 12/01/2020] [Accepted: 12/08/2020] [Indexed: 12/19/2022] Open
Abstract
Vertebral osteomyelitis (VO) is a compelling clinical entity for clinicians, because of its insidious and indolent course that makes diagnosis difficult. A concern is reported about the choice of antibiotic regimens, duration of therapy, and criteria to switch to oral therapy. We conducted a prospective observational study. All consecutive hospitalized patients with a confirmed diagnosis of VO caused by staphylococcal or enterococcal strains were analyzed. The primary endpoint was the analysis of clinical cure at the end of therapy. A propensity score for receiving therapy with daptomycin was added to the model. During the study period, 60 episodes of confirmed VO were observed. The main etiology of infection was methicillin-resistant Staphylococcus aureus (29%). Overall, clinical failure at end of therapy was reported in 11 (18.3%) patients. Logistic regression analysis, after propensity score, showed that >2 vertebrae involved (OR 2.4, CI95% 1.12–5.24, p = 0.002) and inadequate drainage of infection (OR 4.8, CI95% 2.45–8.51, p < 0.001) were independently associated with failure of therapy, while the use of a daptomycin-containing-regimen (OR 0.15, CI 95% 0.04–0.46, p < 0.001) with clinical cure. VO caused by staphylococcal or enterococcal strains is associated with an important rate of clinical failure. Daptomycin-containing regimen was strongly associated with clinical cure. Considering that over 70% of VO etiology is caused by Gram-positive strains but the etiology of infection is obtained in about 75% of cases, these data may help physicians to choose the appropriate antibiotic regimen.
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16
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Smit C, van Schip AM, van Dongen EPA, Brüggemann RJM, Becker ML, Knibbe CAJ. Dose recommendations for gentamicin in the real-world obese population with varying body weight and renal (dys)function. J Antimicrob Chemother 2020; 75:3286-3292. [PMID: 32785707 PMCID: PMC7566361 DOI: 10.1093/jac/dkaa312] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 06/15/2020] [Indexed: 01/06/2023] Open
Abstract
Background The impact of weight on pharmacokinetics of gentamicin was recently elucidated for (morbidly) obese individuals with normal renal function. Objectives To characterize the pharmacokinetics of gentamicin in real-world obese patients, ultimately to develop dose recommendations applicable across the entire obese population. Methods In two large Dutch hospitals, all admitted patients with BMI ≥25 kg/m2 with at least one gentamicin administration, at least one gentamicin and at least one creatinine serum concentration measurement were included. Data from one hospital, obtained from electronic health records, combined with prospective data of non-obese and morbidly obese people with normal renal function, served as the training dataset, and data from the second hospital served as the external validation dataset. Results In the training dataset [1187 observations from 542 individuals, total body weight (TBW) 52–221 kg and renal function (CKD-EPI) 5.1–141.7 mL/min/1.73 m2], TBW was identified as a covariate on distribution volume, and de-indexed CKD-EPI and ICU stay on clearance (all P < 0.001). Clearance was 3.53 L/h and decreased by 0.48 L/h with each 10 mL/min reduction in de-indexed CKD-EPI. The results were confirmed in the external validation (321 observations from 208 individuals, TBW 69–180 kg, CKD-EPI 5.3–130.0 mL/min/1.73 m2). Conclusions Based on the study, we propose specific mg/kg dose reductions with decreasing CKD-EPI values for the obese population, and extension of the dosing interval beyond 24 h when CKD-EPI drops below 50 mL/min/1.73 m2. In ICU patients, a 25% dose reduction could be considered. These guidelines can be used to guide safe and effective dosing of gentamicin across the real-world obese population.
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Affiliation(s)
- Cornelis Smit
- Department of Clinical Pharmacy, St Antonius Hospital, Koekoekslaan 1, 3435 CM Nieuwegein, The Netherlands.,Department of Systems Biomedicine and Pharmacology, Leiden Academic Centre for Drug Research, Leiden University, Einsteinweg 55, 2333 CC Leiden, The Netherlands
| | - Anne M van Schip
- Pharmacy Foundation of Haarlem Hospitals, Boerhaavelaan 24, 2035 RC Haarlem, The Netherlands.,Department of Hospital Pharmacy, Spaarne Gasthuis, Boerhaavelaan 22, 2035 RC Haarlem, The Netherlands.,Faculty of Science and Engineering, Antonius Deusinglaan 1, 9713 AV, University of Groningen, Groningen, The Netherlands
| | - Eric P A van Dongen
- Department of Anesthesiology, St Antonius Hospital, Koekoekslaan 1, 3435 CM Nieuwegein, The Netherlands
| | - Roger J M Brüggemann
- Department of Pharmacy, Rdboud Institute for Health Sciences, Radboudumc, Geert Grooteplein Zuid 8, 6525 GA Nijmegen, The Netherlands
| | - Matthijs L Becker
- Pharmacy Foundation of Haarlem Hospitals, Boerhaavelaan 24, 2035 RC Haarlem, The Netherlands.,Department of Hospital Pharmacy, Spaarne Gasthuis, Boerhaavelaan 22, 2035 RC Haarlem, The Netherlands
| | - Catherijne A J Knibbe
- Department of Clinical Pharmacy, St Antonius Hospital, Koekoekslaan 1, 3435 CM Nieuwegein, The Netherlands.,Department of Systems Biomedicine and Pharmacology, Leiden Academic Centre for Drug Research, Leiden University, Einsteinweg 55, 2333 CC Leiden, The Netherlands
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17
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Adembri C, Novelli A, Nobili S. Some Suggestions from PK/PD Principles to Contain Resistance in the Clinical Setting-Focus on ICU Patients and Gram-Negative Strains. Antibiotics (Basel) 2020; 9:E676. [PMID: 33036190 PMCID: PMC7601871 DOI: 10.3390/antibiotics9100676] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 09/30/2020] [Accepted: 10/02/2020] [Indexed: 12/18/2022] Open
Abstract
The containment of the phenomenon of resistance towards antimicrobials is a priority, especially in preserving molecules acting against Gram-negative pathogens, which represent the isolates more frequently found in the fragile population of patients admitted to Intensive Care Units. Antimicrobial therapy aims to prevent resistance through several actions, which are collectively known as "antimicrobial stewardship", to be taken together, including the application of pharmacokinetic/pharmacodynamic (PK/PD) principles. PK/PD application has been shown to prevent the emergence of resistance in numerous experimental studies, although a straight translation to the clinical setting is not possible. Individualized antibiotic dosing and duration should be pursued in all patients, and even more especially when treating intensive care unit (ICU) septic patients in whom optimal exposure is both difficult to achieve and necessary. In this review, we report on the available data that support the application of PK/PD parameters to contain the development of resistance and we give some practical suggestions that can help to translate the benefit of PK/PD application to the bedside.
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Affiliation(s)
- Chiara Adembri
- Department of Health Sciences, Section of Anesthesiology and IC, University of Florence, 50134 Firenze, Italy;
| | - Andrea Novelli
- Department of Health Sciences, Section of Clinical Pharmacology and Oncology, University of Florence, 50139 Firenze, Italy;
| | - Stefania Nobili
- Department of Health Sciences, Section of Clinical Pharmacology and Oncology, University of Florence, 50139 Firenze, Italy;
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18
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Cole JL. Gap Analysis for the Conversion to Area Under the Curve Vancomycin Monitoring in a Small Rural Hospital. Fed Pract 2020; 37:S12-S17. [PMID: 32704226 PMCID: PMC7373075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
OBJECTIVE Consensus guidelines for vancomycin monitoring now recommend area under the curve (AUC) calculations for optimal vancomycin efficacy and safety. This will be a major practice change for many facilities. Implementation guidance is available but has not been reported in smaller, primary care hospitals. The objective of this study was to measure the uptake of AUC monitoring implementation in a rural facility. METHODS This is a gap analysis evaluating the appropriateness of vancomycin levels tests after the April 1, 2019 transition. All vancomycin levels between April 2019 and June 2019 after the go-live date were included with no exclusions in a retrospective chart review. The primary outcome was the proportion of levels in the appropriate time frame: peaks 1 to 2 hours after infusion with troughs at least 1 half-life after initial dose and prior to the next dose. Secondary outcomes included reasons identified for inappropriate levels and the proportion of AUC24 calculations within therapeutic range (400-600 mg.h/L). Descriptive statistics were used to measure the scope and outcomes of this transition. RESULTS The transition was effective with 97% of cases utilizing AUC-based methods. There were 65 vancomycin levels in the 3-month study period with 86% deemed appropriate. Of the 9 inappropriate levels, 4 had to be repeated for accurate monitoring. There were 28 two-level couplets used for AUC24 calculations, 17 (61%) fell within therapeutic range. CONCLUSION Implementation strategies for the AUC transition described in tertiary medical centers can be successfully utilized in primary facilities.
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Affiliation(s)
- Jennifer L Cole
- is a Clinical Pharmacy Specialist in Critical Care and Internal Medicine at Veterans Health Care System of the Ozarks in Fayetteville, Arkansas
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19
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Abdul-Aziz MH, Alffenaar JWC, Bassetti M, Bracht H, Dimopoulos G, Marriott D, Neely MN, Paiva JA, Pea F, Sjovall F, Timsit JF, Udy AA, Wicha SG, Zeitlinger M, De Waele JJ, Roberts JA. Antimicrobial therapeutic drug monitoring in critically ill adult patients: a Position Paper .. Intensive Care Med 2020; 46:1127-1153. [PMID: 32383061 PMCID: PMC7223855 DOI: 10.1007/s00134-020-06050-1] [Citation(s) in RCA: 489] [Impact Index Per Article: 122.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Accepted: 04/10/2020] [Indexed: 12/12/2022]
Abstract
Purpose This Position Paper aims to review and discuss the available data on therapeutic drug monitoring (TDM) of antibacterials, antifungals and antivirals in critically ill adult patients in the intensive care unit (ICU). This Position Paper also provides a practical guide on how TDM can be applied in routine clinical practice to improve therapeutic outcomes in critically ill adult patients.
Methods Literature review and analysis were performed by Panel Members nominated by the endorsing organisations, European Society of Intensive Care Medicine (ESICM), Pharmacokinetic/Pharmacodynamic and Critically Ill Patient Study Groups of European Society of Clinical Microbiology and Infectious Diseases (ESCMID), International Association for Therapeutic Drug Monitoring and Clinical Toxicology (IATDMCT) and International Society of Antimicrobial Chemotherapy (ISAC). Panel members made recommendations for whether TDM should be applied clinically for different antimicrobials/classes. Results TDM-guided dosing has been shown to be clinically beneficial for aminoglycosides, voriconazole and ribavirin. For most common antibiotics and antifungals in the ICU, a clear therapeutic range has been established, and for these agents, routine TDM in critically ill patients appears meritorious. For the antivirals, research is needed to identify therapeutic targets and determine whether antiviral TDM is indeed meritorious in this patient population. The Panel Members recommend routine TDM to be performed for aminoglycosides, beta-lactam antibiotics, linezolid, teicoplanin, vancomycin and voriconazole in critically ill patients. Conclusion Although TDM should be the standard of care for most antimicrobials in every ICU, important barriers need to be addressed before routine TDM can be widely employed worldwide. Electronic supplementary material The online version of this article (10.1007/s00134-020-06050-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Mohd H Abdul-Aziz
- University of Queensland Centre for Clinical Research (UQCCR), Faculty of Medicine, The University of Queensland, Brisbane, QLD, 4029, Australia
| | - Jan-Willem C Alffenaar
- School of Pharmacy, Faculty of Medicine and Health, University of Sydney, Sydney, NSW, Australia.,Westmead Hospital, Westmead, NSW, Australia.,Marie Bashir Institute of Infectious Diseases and Biosecurity, University of Sydney, Sydney, NSW, Australia
| | - Matteo Bassetti
- Infectious Diseases Clinic, Department of Health Sciences, University of Genoa, Genoa and Hospital Policlinico San Martino - IRCCS, Genoa, Italy
| | - Hendrik Bracht
- Department of Anaesthesiology, University Ulm, Ulm, Germany
| | - George Dimopoulos
- Department of Critical Care, University Hospital Attikon, National and Kapodistrian University of Athens, Athens, Greece
| | - Deborah Marriott
- Department of Microbiology and Infectious Diseases, St. Vincent's Hospital, Sydney, NSW, Australia
| | - Michael N Neely
- Department of Paediatrics, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA.,Division of Infectious Diseases, Children's Hospital Los Angeles, Los Angeles, CA, USA
| | - Jose-Artur Paiva
- Department of Medicine, Faculty of Medicine of Porto, Porto, Portugal.,Department of Emergency and Intensive Care Medicine, Centro Hospitalar Universitario de São João, Porto, Portugal
| | - Federico Pea
- Institute of Clinical Pharmacology, SM Misericordia University Hospital, ASUFC, Udine, Italy
| | - Fredrik Sjovall
- Department of Perioperative Medicine, Skåne University Hospital, Malmö, Sweden
| | - Jean F Timsit
- Department of Intensive Care Medicine and Infectious Diseases, Bichat-Claude Bernard University Hospital, AP-HP, Paris, France.,Infection, Antimicrobials, Modelling, Evolution (IAME), Paris Diderot University, Paris, France
| | - Andrew A Udy
- Australian and New Zealand Intensive Care Research Centre, School of Public Health and Preventive Medicine, Monash University, Melbourne, VIC, Australia.,Department of Intensive Care and Hyperbaric Medicine, The Alfred, Melbourne, VIC, Australia
| | - Sebastian G Wicha
- Department of Clinical Pharmacy, Institute of Pharmacy, University of Hamburg, Hamburg, Germany
| | - Markus Zeitlinger
- Department of Clinical Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Jan J De Waele
- Department of Critical Care Medicine, Ghent University Hospital, Ghent, Belgium
| | - Jason A Roberts
- University of Queensland Centre for Clinical Research (UQCCR), Faculty of Medicine, The University of Queensland, Brisbane, QLD, 4029, Australia. .,Department of Intensive Care Medicine and Pharmacy, Royal Brisbane and Women's Hospital, Brisbane, QLD, Australia. .,Centre for Translational Anti-infective Pharmacodynamics, School of Pharmacy, The University of Queensland, Brisbane, QLD, Australia. .,Division of Anaesthesiology Critical Care Emergency and Pain Medicine, Nîmes University Hospital, University of Montpellier, Nîmes, France.
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Hoff BM, Scheetz MH, Jain M, Cullina JF, Rhodes NJ. Exploring the Relationship between FEV 1 Loss and Recovery and Aminoglycoside Pharmacokinetics in Adult Patients with Cystic Fibrosis: Implications for Clinical Dosing Strategies. Pharmacotherapy 2020; 40:584-591. [PMID: 32259317 DOI: 10.1002/phar.2399] [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: 01/05/2020] [Revised: 03/13/2020] [Accepted: 03/24/2020] [Indexed: 11/09/2022]
Abstract
OBJECTIVE Systemic aminoglycosides remain a cornerstone of treatment for cystic fibrosis (CF) pulmonary exacerbations (PEx); however, the impact of aminoglycoside pharmacokinetics (PK) on outcomes is not well defined in adult CF patients. Our objective was to assess the impact of increasing PK exposures on the clinical outcomes of PEx treatment in adult CF patients receiving high-dose and standard-dose extended-interval aminoglycosides. METHODS We conducted a retrospective study of adult CF patients treated with an intravenous aminoglycoside for a PEx. Serum amikacin, gentamicin, and tobramycin levels and forced expiratory volume over 1 second (FEV1 ) data were used to evaluate exposure-response relationships. PK parameters were estimated using a Bayesian approach to obtain area under the curve (AUC)0-24 hr , maximum concentration (Cmax0-24 hr ), and minimum concentration (Cmin0-24 hr ) estimates. The primary efficacy end point was a 90% recovery of baseline FEV1 by 30 days posttreatment. Toxicity included signs or symptoms of ototoxicity, vestibular toxicity, or renal toxicity. Multivariate linear mixed-effects models of FEV1 were used for exposure-response analysis. RESULTS The study included 51 patients who contributed 188 FEV1 observations. There were 3.0 ± 1.7 (mean ± SD) aminoglycoside concentrations per patient. The mean AUC0-24 hr , Cmax0-24 hr , and Cmin0-24 hr across all agents and patients were 156 ± 96 mg*hr/L, 29.9 ± 12.7 mg/L, and 0.35 ± 0.66 mg/L, respectively. A total of 42 amikacin-, gentamicin-, or tobramycin-treated patients contributed to the efficacy analysis, of whom 85.7% experienced recovery posttreatment. Of the 51 included patients, 6 (11.8%) experienced seven toxicity events. In exploratory exposure-response analyses, neither AUC0-24 hr nor Cmax0-24 hr was associated with FEV1 values after adjusting for clinical covariates and baseline FEV1 . CONCLUSIONS Increasing aminoglycoside AUC0-24 hr and Cmax0-24 hr were not associated with FEV1 during PEx treatment. Although individualizing aminoglycoside dosing in adult CF patients is necessary to minimize toxicity risk, more work is needed to define optimally safe and effective dosing strategies for this population.
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Affiliation(s)
- Brian M Hoff
- Department of Pharmacy, Northwestern Memorial Hospital, Chicago, Illinois
| | - Marc H Scheetz
- Department of Pharmacy, Northwestern Memorial Hospital, Chicago, Illinois.,Department of Pharmacy Practice, Midwestern University Chicago College of Pharmacy, Downers Grove, Illinois.,Pharmacometrics Center of Excellence, Midwestern University Chicago College of Pharmacy, Downers Grove, Illinois
| | - Manu Jain
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | | | - Nathaniel J Rhodes
- Department of Pharmacy, Northwestern Memorial Hospital, Chicago, Illinois.,Department of Pharmacy Practice, Midwestern University Chicago College of Pharmacy, Downers Grove, Illinois.,Pharmacometrics Center of Excellence, Midwestern University Chicago College of Pharmacy, Downers Grove, Illinois
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21
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AUC- vs. Trough-Guided Monitoring of Vancomycin in Infants. Indian J Pediatr 2020; 87:359-364. [PMID: 31984471 DOI: 10.1007/s12098-019-03162-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Accepted: 12/17/2019] [Indexed: 10/25/2022]
Abstract
OBJECTIVE Improving vancomycin therapy with therapeutic drug monitoring is recommended. Over the past few years, a few studies have demonstrated that trough concentrations may not be the optimal parameter for monitoring vancomycin concentration and Area under the curve (AUC) should be used instead. In this study authors evaluate two methods to estimate the AUC. The first method is based on linear regression using only a trough concentration. The second method uses a simplified two-sample equation-based strategy to estimate the AUC. METHODS Data from 70 infant patients were collected retrospectively from their medical records at King Saud University Medical City. The prediction accuracy for vancomycin therapy monitoring was optimized by comparing the two methods for the AUC calculation, the simple linear regression and simplified two-sample equation-based strategy. RESULTS The target AUC > 400 μg × h/ml was achieved in 10%, 71%, and 100% of patients with trough concentration ranges of 5-10, 10-15, and > 15 μg/ml, respectively. There was a strong correlation between the predicted and observed AUC calculated using the simplified two-sample equation-based strategy (R2 = 0.91, bias = -3.9%, precision =12%). CONCLUSIONS The target AUC > 400 μg × h/ml can be achieved at trough concentrations <15 μg/ml in most patients. Targeting trough concentrations >15 can lead to overdoing and increase risk of nephrotoxicity. The authors recommend estimating the AUC using the simplified two-sample equation strategy for more precise dosing of vancomycin. Using AUC-guided dosing instead of the trough-guided approach can prevent over dosing and reduce the risk of nephrotoxicity.
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22
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Adembri C, Villa G, Rosi E, Tofani L, Fallani S, De Gaudio AR, Novelli A. Caspofungin PK in critically ill patients after the first and fourth doses: suggestions for therapeutic drug monitoring? J Chemother 2020; 32:124-131. [PMID: 32202224 DOI: 10.1080/1120009x.2020.1737783] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
We describe caspofungin pharmacokinetics (PK) after the first and fourth doses in 20 critically ill septic patients. Monte Carlo simulation was used to analyze the probability of target attainment (PTA) (AUC/MIC > 865) for Candida spp. Caspofungin concentrations were analyzed by HPLC in plasma and urine. A great variability in PK parameters was observed after both doses. Patients were divided in two groups according to their AUC values (AUC ≤ 75 mg h/L cut-off). In the low-AUC group Cmax, Cmin and AUC were lower, while Vd and Cl were higher than in the high-AUC group (p < 0.05, both at day 1 and 4). The mean 24-h urinary recovery of the drug was 8 ± 6.3% (day1) and 9.8 ± 6.3 (day4). Monte Carlo simulation analysis (0.03-1 mg/L MIC-range) showed that PTA was guaranteed only for MICs ≤ 0.03 mg/L in the low-AUC group, and for MICs ≤ 0.06 mg/L in the high-AUC group. No group had a PTA ≥ 90% for 0.125 mg/L MIC (the epidemiological cut-off). Mortality was higher in low-AUC group (p < 0.01). In our 'real-world' population, no clinical data can predict which patient will have lower, suboptimal caspofungin exposure, therefore we suggest TDM to optimize caspofungin therapy and reduce the risk of selecting resistances (CEAVC, 32366/2015; OSS.15.114, NCT03798600).
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Affiliation(s)
- C Adembri
- Department of Health Sciences, Section of Anesthesiology and Intensive Care, University of Florence, Azienda Ospedaliero-Universitaria Careggi, Florence, Italy
| | - G Villa
- Department of Health Sciences, Section of Anesthesiology and Intensive Care, University of Florence, Azienda Ospedaliero-Universitaria Careggi, Florence, Italy
| | - E Rosi
- Department of Health Sciences, Section of Clinical Pharmacology and Oncology, University of Florence, Florence, Italy
| | - L Tofani
- Department of Neurosciences, Psychology, Drug Research and Child Health, University of Florence, Florence, Italy
| | - S Fallani
- Department of Health Sciences, Section of Clinical Pharmacology and Oncology, University of Florence, Florence, Italy
| | - A R De Gaudio
- Department of Health Sciences, Section of Anesthesiology and Intensive Care, University of Florence, Azienda Ospedaliero-Universitaria Careggi, Florence, Italy
| | - A Novelli
- Department of Health Sciences, Section of Clinical Pharmacology and Oncology, University of Florence, Florence, Italy
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23
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Examining the Relationship Between Vancomycin Area Under the Concentration Time Curve and Serum Trough Levels in Adults With Presumed or Documented Staphylococcal Infections. Ther Drug Monit 2020; 41:483-488. [PMID: 30817704 DOI: 10.1097/ftd.0000000000000622] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Investigations of the relationship between vancomycin trough concentrations and area under the concentration time curve (AUC) are growing, but still limited. The authors sought to determine vancomycin exposure among hospitalized adults with presumed or confirmed invasive staphylococcal infections using 2-level pharmacokinetic monitoring to inform changes to an institutional vancomycin dosing protocol. METHODS This was a retrospective observational study performed in 2 acute care hospitals. Adults prescribed vancomycin (therapeutic trough 15-20 mg/L) for a presumed or documented invasive staphylococcal infection were evaluated. Two steady-state serum vancomycin levels were used to determine each patient's 24-hour AUC to minimum inhibitory concentration ratio (AUC/MIC) using a non-Bayesian, equation-based approach. Patient demographics and crude clinical outcomes were also collected. RESULTS Thirty-four patients were included in the study, with 2 patients having vancomycin levels drawn twice (36 sets of levels). Most patients were located in an intensive care unit (91.2%), and 85.3% of patients were prescribed vancomycin for bacteremia, pneumonia, or endocarditis. The mean ± SD vancomycin Cmin was 16.6 ± 6.1 mg/L, and the mean AUC/MIC was 588 ± 156 mg/L × hour. The rate of 24-hour vancomycin AUC/MIC target attainment was 91.2% (n = 31/34). Of the patients with a Cmin > 9 mg/L, 100% (n = 33) achieved AUC/MIC values >400 mg/L × hour and 93.9% were >500 mg/L × hour. There was a strong correlation between vancomycin Cmin and AUC24 hr (R = 0.731; P < 0.001). CONCLUSIONS Targeting a vancomycin trough between 15 and 20 mg/L frequently resulted in an AUC/MIC greater than that thought to be necessary for efficacy optimization. Considering these findings alongside the practical challenges associated with wide-scale implementation of AUC monitoring, reducing the target trough as a means to prevent vancomycin overexposure warrants clinical consideration and further evaluation.
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24
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Zhao Y, Seelhammer TG, Barreto EF, Wilson JW. Altered Pharmacokinetics and Dosing of Liposomal Amphotericin B and Isavuconazole during Extracorporeal Membrane Oxygenation. Pharmacotherapy 2019; 40:89-95. [PMID: 31742741 DOI: 10.1002/phar.2348] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Drug pharmacokinetics may be significantly altered in patients receiving extracorporeal membrane oxygenation (ECMO). Ensuring the optimized effective dosing of antimicrobials on ECMO remains a challenge. To date, limited data are available regarding the optimal use of amphotericin and triazoles during ECMO. We report a case of altered pharmacokinetics, insufficient liposomal amphotericin B and isavuconazole levels, and the need for escalated doses during ECMO in a patient with severe acute respiratory distress syndrome secondary to pulmonary blastomycosis. A 2-fold increase in the standard total daily dose of both drugs was necessary to overcome low serum concentrations thought to be secondary to drug loss from ECMO circuit sequestration. These findings have important implications for optimizing antimicrobial therapy in patients receiving ECMO to maximize therapeutic efficacy. The use of therapeutic drug monitoring for patients receiving antimicrobial therapy with concurrent ECMO may facilitate appropriate drug dosing to achieve adequate serum concentrations and optimize favorable patient outcomes. Further studies exploring antimicrobial pharmacokinetics during ECMO are needed to inform dosing recommendations in critically ill patients.
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Affiliation(s)
- Yanjun Zhao
- Department of Pharmacy, Mayo Clinic, Rochester, Minnesota
| | - Troy G Seelhammer
- Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, Rochester, Minnesota
| | - Erin F Barreto
- Department of Pharmacy, Mayo Clinic, Rochester, Minnesota.,Robert D. and Patricia E. Kern Center for the Science of Health Care Delivery, Mayo Clinic, Rochester, Minnesota
| | - John W Wilson
- Division of Infectious Diseases, Mayo Clinic, Rochester, Minnesota
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25
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Mesini A, Loy A, Gattorno M, Moscatelli A, Bandettini R, Faraci M, Cangemi G, Castagnola E. Colistin Area Under the Time-Concentration in Children Treated With Intravenous Loading Dose and Maintenance Therapy. Clin Infect Dis 2019; 66:808-809. [PMID: 29020309 DOI: 10.1093/cid/cix757] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Alessio Mesini
- Infectious Diseases Unit, University of Genoa, S. Martino Hospital
| | - Anna Loy
- Istituto Giannina Gaslini, Children's Hospital Genoa, Italy
| | - Marco Gattorno
- Istituto Giannina Gaslini, Children's Hospital Genoa, Italy
| | | | | | - Maura Faraci
- Istituto Giannina Gaslini, Children's Hospital Genoa, Italy
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26
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Heil EL, Claeys KC, Mynatt RP, Hopkins TL, Brade K, Watt I, Rybak MJ, Pogue JM. Making the change to area under the curve–based vancomycin dosing. Am J Health Syst Pharm 2018; 75:1986-1995. [DOI: 10.2146/ajhp180034] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Affiliation(s)
- Emily L. Heil
- Department of Pharmacy Practice and Science, University of Maryland School of Pharmacy, Baltimore, MD, and Department of Pharmacy, University of Maryland Medical Center, Baltimore MD
| | - Kimberly C. Claeys
- Department of Pharmacy Practice and Science, University of Maryland School of Pharmacy, Baltimore, MD, and Department of Pharmacy, University of Maryland Medical Center, Baltimore, MD
| | - Ryan P. Mynatt
- Department of Pharmacy, Detroit Receiving Hospital, Detroit Medical Center, Detroit, MI
| | - Teri L. Hopkins
- Department of Pharmacy, South Texas Veterans Health Care System, San Antonio, TX
| | - Karrine Brade
- Department of Pharmacy, Boston Medical Center, Boston, MA
| | - Ian Watt
- Department of Pharmacy, University of Maryland Medical Center, Baltimore, MD
| | - Michael J. Rybak
- Anti-Infective Research Laboratory, Department of Pharmacy Practice, Wayne State University, Detroit, MI, and Department of Pharmacy, Detroit Receiving Hospital, Detroit Medical Center, Detroit, MI
| | - Jason M. Pogue
- Department of Pharmacy, Sinai Grace Hospital, Detroit Medical Center, Detroit, MI
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27
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Abstract
BACKGROUND Several studies have reported that trough levels may not be optimal for monitoring vancomycin therapy, because of overexposure and nephrotoxicity risks. Therefore, we developed a population pharmacokinetic model to optimize vancomycin dosing and monitoring in pediatrics. METHODS Data were retrospectively collected on 76 pediatric patients 1-12 years of age, admitted to general pediatric wards or intensive care units at King Saud University Medical City, Riyadh, Saudi Arabia. The predictability of 3 methods for calculating the area under the curve (AUC) at steady state was assessed for optimum vancomycin therapy monitoring. The 3 methods were simple linear regression, Bayesian approach and the 2-sample pharmacokinetic equation method. We also used Monet Carlo simulations to evaluate the dosing of vancomycin. RESULTS A 1-compartment model adequately described the data. A strong correlation occurred between the observed and predicted AUC from 0 to 24 hours (AUC0-24h) calculated using the Bayesian approach with a trough sample only or pharmacokinetic equations based on 2 measured samples (R = 0.93 and 0.92, respectively). For the simple linear regression method with a trough sample only, the predicted AUC0-24h at steady state with vancomycin trough levels of 10, 15 and 20 µg/mL were 413, 548 and 714 µg·hour/mL, respectively. The target AUC0-24h above 400 was achieved in 46% and 95% of individuals with trough values of 7-11 and 11-15 µg/mL, respectively. Monte Carlo simulations showed that 60-80 mg/kg/d doses are needed to optimize vancomycin therapy. CONCLUSIONS In conclusion, targeting vancomycin trough levels above 15 µg/mL in pediatrics would overshoot the target AUC0-24h above 400 and expose them to unnecessary adverse events.
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28
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Soraluce A, Asín-Prieto E, Rodríguez-Gascón A, Barrasa H, Maynar J, Carcelero E, Soy D, Isla A. Population pharmacokinetics of daptomycin in critically ill patients. Int J Antimicrob Agents 2018; 52:158-165. [PMID: 29572042 DOI: 10.1016/j.ijantimicag.2018.03.008] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Revised: 03/05/2018] [Accepted: 03/11/2018] [Indexed: 12/29/2022]
Abstract
Daptomycin has shown activity against a wide range of Gram-positive bacteria; however, the approved dosages usually seem insufficient for critically ill patients. The aim of this study was to develop a population pharmacokinetic model for daptomycin in critically ill patients and to estimate the success of the therapy by applying pharmacokinetic/pharmacodynamic (PK/PD) criteria. Sixteen intensive care unit patients were included, four of whom underwent continuous renal replacement therapies (CRRT). Blood and, when necessary, effluent samples were drawn after daptomycin administration at previously defined time points. A population approach using NONMEM 7.3 was performed to analyse data. Monte Carlo simulations were executed to evaluate the suitability of different dosage regimens. The probabilities of achieving the PK/PD target value associated with treatment success (ratio of the area under the plasma concentration-time curve over 24 h divided by the minimum inhibitory concentration (AUC24/MIC ≥ 666)) and to reach daptomycin concentrations linked to toxicity (minimum concentration at steady-state (Cminss) ≥ 24.3 mg/L) were calculated. The pharmacokinetics of daptomycin was best described by a one-compartment model. Elimination was conditioned by the creatinine clearance (Clcr) and also by the extra-corporeal clearance when patients were subjected to continuous renal replacement therapy (CRRT). The PK/PD analysis confirmed that 280- and 420-mg/d dosages would not be enough to achieve high probabilities of target attainment for MIC values ≥ 1 mg/L in patients with Clcr ≥ 60 mL/min or in subjects with lower Clcrs but receiving CRRT. In these patients, higher dosages (560-840 mg/d) should be needed. When treating infections due to MIC values ≥ 4 mg/L, even the highest dose would be insufficient.
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Affiliation(s)
- A Soraluce
- Pharmacokinetics, Nanotechnology and Gene Therapy Group, Faculty of Pharmacy. Centro de Investigación Lascaray-ikergunea, University of the Basque Country UPV/EHU, Vitoria-Gasteiz, Spain
| | - E Asín-Prieto
- Pharmacokinetics, Nanotechnology and Gene Therapy Group, Faculty of Pharmacy. Centro de Investigación Lascaray-ikergunea, University of the Basque Country UPV/EHU, Vitoria-Gasteiz, Spain
| | - A Rodríguez-Gascón
- Pharmacokinetics, Nanotechnology and Gene Therapy Group, Faculty of Pharmacy. Centro de Investigación Lascaray-ikergunea, University of the Basque Country UPV/EHU, Vitoria-Gasteiz, Spain
| | - H Barrasa
- Intensive Care Unit, University Hospital Araba, Vitoria-Gasteiz, Spain
| | - J Maynar
- Intensive Care Unit, University Hospital Araba, Vitoria-Gasteiz, Spain
| | - E Carcelero
- Pharmacy Department, Hospital Clinic Barcelona - Division of Medicines, Barcelona, Spain
| | - D Soy
- Pharmacy Department, Hospital Clinic Barcelona - Division of Medicines, Barcelona, Spain
| | - A Isla
- Pharmacokinetics, Nanotechnology and Gene Therapy Group, Faculty of Pharmacy. Centro de Investigación Lascaray-ikergunea, University of the Basque Country UPV/EHU, Vitoria-Gasteiz, Spain.
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29
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Cangemi G, Mesini A, Castagnola E. Reply to Magréault et al. Clin Infect Dis 2018; 66:809-810. [DOI: 10.1093/cid/cix1047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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30
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A Strategy for Dosing Vancomycin to Therapeutic Targets Using Only Trough Concentrations. Clin Pharmacokinet 2017; 56:263-272. [PMID: 27389404 DOI: 10.1007/s40262-016-0435-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Effective treatment of complicated methicillin-resistant Staphylococcus aureus (MRSA) infections with vancomycin requires a 24-h area under the concentration-time curve (AUC24) to minimum inhibitory concentration (MIC) ratio of at least 400. To ensure goal AUC24 has been reached requires either dosing to concentrations strongly associated with nephrotoxicity, measurement of patient-specific pharmacokinetics, or use of Bayesian statistics. In this study, we show a method of determining patient-specific pharmacokinetics and dosing to therapeutic AUC24 while minimizing potentially toxic concentrations, guided by only trough measurements. A Monte-Carlo simulation of 10,000 patients with complicated MRSA infections was prepared from two-compartment pharmacokinetic parameters using patient data extracted from the literature. The proposed method of determining patient-specific pharmacokinetics using consecutive trough concentrations was found to be more accurate than the conventional peak-trough method for peaks measured up to 4 h after infusion. Simulated human error in trough timing was found to reduce accuracy of the consecutive trough method, but an approach to resolve timing errors during a loading sequence or at steady-state using iteration is proposed. Both the simulated minimized concentration strategy and trough-based dosing to 15-20 mg/L had a high probability of achieving AUC24 at least 400 mg·h/L, but conventional trough-based dosing was associated with higher probability of potentially toxic 24-h doses and trough concentrations. The proposed strategy must be validated in real patients, with outcomes assessed before it is used in daily practice, but the theoretical benefits found in the simulation suggest this simple strategy should be considered with other AUC24-based approaches.
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31
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Gustinetti G, Cangemi G, Bandettini R, Castagnola E. Pharmacokinetic/pharmacodynamic parameters for treatment optimization of infection due to antibiotic resistant bacteria: a summary for practical purposes in children and adults. J Chemother 2017; 30:65-81. [PMID: 29025364 DOI: 10.1080/1120009x.2017.1377909] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
In the last years, there has been a tremendous increase in the incidence of bacterial infections due to resistant strains, especially multi-drug resistant Gram-negative bacilli. In Europe, a north to south and a west to east gradient was noticed, with more than one third of the K. pneumonia isolates being resistant to carbapenems in few countries. New antibiotics are lacking and, as a consequence, pharmacokinetic/pharmacodynamic parameters, normalized to pathogen minimal inhibitory concentration, are used with increased frequency to treat infections due to difficult-to-treat pathogens. These parameters are available at least for the adult population, but sparse in many different publications. This review wants to provide a comprehensive and 'easy to read' text for everyday practice, briefly summarizing the presently available knowledge on pharmacokinetic/pharmacodynamic parameters (normalized for minimal inhibitory concentration values) of different class drugs, that can be applied for an effective antibacterial treatment infections due to antibiotic-resistant pathogens.
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Affiliation(s)
- Giulia Gustinetti
- a Department of Infectious Diseases , University of Genoa , Genoa , Italy
| | - Giuliana Cangemi
- b Istituto Giannina Gaslini, Children's Hospital , Genoa , Italy
| | | | - Elio Castagnola
- b Istituto Giannina Gaslini, Children's Hospital , Genoa , Italy
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32
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Morris S, Gould K, Ferguson LP. The Use of Daptomycin to Treat Methicillin-Resistant Staphylococcus Epidermidis Bacteremia in a Critically Ill Child with Renal Failure. J Pediatr Pharmacol Ther 2017; 22:300-303. [PMID: 28943826 DOI: 10.5863/1551-6776-22.4.300] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Daptomycin is excreted primarily unchanged by the kidney. Dosage regimens in children with renal failure remain to be determined. We report the case of an 8-year-old child with multiorgan failure undergoing continuous peritoneal dialysis, successfully treated with intravenous daptomycin for methicillin-resistant Staphylococcus epidermidis bacteremia. A dosage of 8 mg/kg every 48 hour was used. Plasma peak and trough concentrations of daptomycin were 68 mg/L and 14.6 mg/L, respectively, on day 6 of treatment. The dosage regimen achieved daptomycin exposure comparable to that reported in adults undergoing continuous ambulatory peritoneal dialysis and receiving recommended dosages.
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33
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D'Avolio A, Pensi D, Baietto L, Pacini G, Di Perri G, De Rosa FG. Daptomycin Pharmacokinetics and Pharmacodynamics in Septic and Critically Ill Patients. Drugs 2017; 76:1161-74. [PMID: 27412121 DOI: 10.1007/s40265-016-0610-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Infections, including sepsis, are associated with high mortality rates in critically ill patients in the intensive care unit (ICU). Appropriate antibiotic selection and adequate dosing are important for improving patient outcomes. Daptomycin is bactericidal in bloodstream infections caused by Staphylococcus aureus and other Gram-positive pathogens cultured in ICU patients. The drug has concentration-dependent activity, and the area under the curve/minimum inhibitory concentration ratio is the pharmacokinetic/pharmacodynamic (PK/PD) index that best correlates with daptomycin activity, whereas toxicity correlates well with daptomycin plasma trough concentrations (or minimum concentration [C min]). Adequate daptomycin exposure can be difficult to achieve in ICU patients; multiple PK alterations can result in highly variable plasma concentrations, which are difficult to predict. For this reason, therapeutic drug monitoring could help clinicians optimize daptomycin dosing, thus improving efficacy while decreasing the likelihood of serious adverse events. This paper reviews the literature on daptomycin in ICU patients with sepsis, focusing on dosing and PK and PD parameters.
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Affiliation(s)
- Antonio D'Avolio
- Unit of Infectious Diseases, Department of Medical Sciences, Amedeo di Savoia Hospital, University of Turin, Turin, Italy.
| | - Debora Pensi
- Unit of Infectious Diseases, Department of Medical Sciences, Amedeo di Savoia Hospital, University of Turin, Turin, Italy
| | - Lorena Baietto
- Unit of Infectious Diseases, Department of Medical Sciences, Amedeo di Savoia Hospital, University of Turin, Turin, Italy
| | | | - Giovanni Di Perri
- Unit of Infectious Diseases, Department of Medical Sciences, Amedeo di Savoia Hospital, University of Turin, Turin, Italy
| | - Francesco Giuseppe De Rosa
- Unit of Infectious Diseases, Department of Medical Sciences, Amedeo di Savoia Hospital, University of Turin, Turin, Italy
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34
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Falcone M, Russo A, Merli M, Venditti M. Reply to: "The Possible Role of Anti-methicillin-resistant Staphylococus Aureus Antimicrobial Agents in Spontaneous Bacterial Peritonitis". Infect Dis Rep 2015; 7:6356. [PMID: 26753089 PMCID: PMC4693337 DOI: 10.4081/idr.2015.6356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Accepted: 12/09/2015] [Indexed: 11/23/2022] Open
Abstract
not required
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Affiliation(s)
- Marco Falcone
- Department of Public Health and Infectious Diseases, Sapienza University of Rome , Italy
| | - Alessandro Russo
- Department of Public Health and Infectious Diseases, Sapienza University of Rome , Italy
| | - Manuela Merli
- Department of Clinical Medicine, Policlinico Umberto I, Sapienza University of Rome , Italy
| | - Mario Venditti
- Department of Public Health and Infectious Diseases, Sapienza University of Rome , Italy
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35
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Falcone M, Russo A, Venditti M. Optimizing antibiotic therapy of bacteremia and endocarditis due to staphylococci and enterococci: new insights and evidence from the literature. J Infect Chemother 2015; 21:330-9. [PMID: 25813608 DOI: 10.1016/j.jiac.2015.02.012] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Revised: 02/24/2015] [Accepted: 02/25/2015] [Indexed: 11/26/2022]
Abstract
Gram-positive cocci are a well-recognised major cause of nosocomial infection worldwide. Bloodstream infections due to methicillin-resistant Staphylococcus aureus, methicillin-resistant coagulase-negative staphylococci, and multi-drug resistant enterococci are a cause of concern for physicians due to their related morbidity and mortality rates. Aim of this article is to review the current state of knowledge regarding the management of BSI caused by staphylococci and enterococci, including infective endocarditis, and to identify those factors that may help physicians to manage these infections appropriately. Moreover, we discuss the importance of an appropriate use of antimicrobial drugs, taking in consideration the in vitro activity, clinical efficacy data, pharmacokinetic/pharmacodynamic parameters, and potential side effects.
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Affiliation(s)
- Marco Falcone
- Department of Public Health and Infectious Diseases, Policlinico Umberto I, "Sapienza" University of Rome, Italy.
| | - Alessandro Russo
- Department of Public Health and Infectious Diseases, Policlinico Umberto I, "Sapienza" University of Rome, Italy
| | - Mario Venditti
- Department of Public Health and Infectious Diseases, Policlinico Umberto I, "Sapienza" University of Rome, Italy
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Pai MP, Neely M, Rodvold KA, Lodise TP. Innovative approaches to optimizing the delivery of vancomycin in individual patients. Adv Drug Deliv Rev 2014; 77:50-7. [PMID: 24910345 DOI: 10.1016/j.addr.2014.05.016] [Citation(s) in RCA: 174] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2014] [Revised: 05/22/2014] [Accepted: 05/28/2014] [Indexed: 11/15/2022]
Abstract
The delivery of personalized antimicrobial therapy is a critical component in the treatment of patients with invasive infections. Vancomycin, the drug of choice for infections due to methicillin-resistant Staphylococcus aureus, requires the use of therapeutic drug monitoring (TDM) for delivery of optimal therapy. Current guidance on vancomycin TDM includes the measurement of a trough concentration as a surrogate for achieving an AUC to minimum inhibitory concentration (MIC) by broth microdilution (AUC/MICBMD) ratio≥400. Although trough-only monitoring has been widely integrated into clinical practice, there is a high degree of inter-individual variability between a measured trough concentration and the actual AUC value. The therapeutic discordance between AUC and trough may lead to suboptimal outcomes among patients with infections due to less susceptible pathogens or unnecessarily increase the probability of acute kidney injury (AKI) in others. Given the potentially narrow vancomycin AUC range for optimal effect and minimal AKI, clinicians need a "real-time" system to predict accurately the AUC with limited pharmacokinetic (PK) sampling. This article reviews two innovative approaches for calculating the vancomycin AUC in clinical practice based on one or two drug concentrations. One such approach involves the use of Bayesian computer software programs to estimate the "true" vancomycin AUC value with minimal PK sampling and provide AUC-guided dosing recommendations at the bedside. An alternative involves use of two concentrations (peak and trough) and simple analytic equations to estimate AUC values. Both approaches provide considerable improvements over the current trough-only concentration monitoring method.
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Affiliation(s)
- Manjunath P Pai
- Albany College of Pharmacy and Health Sciences, Albany, NY, USA
| | - Michael Neely
- University of Southern California, Keck School of Medicine, Los Angeles, CA, USA; Laboratory of Applied Pharmacokinetics and Bioinformatics (LAPKB), Children's Hospital of Los Angeles, Los Angeles, CA, USA
| | - Keith A Rodvold
- Colleges of Pharmacy and Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Thomas P Lodise
- Albany College of Pharmacy and Health Sciences, Albany, NY, USA.
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