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Frey M, Smigielski L, Tini E, Fekete S, Fleischhaker C, Wewetzer C, Karwautz A, Correll CU, Gerlach M, Taurines R, Plener PL, Malzahn U, Kornbichler S, Weninger L, Brockhaus M, Reuter-Dang SY, Reitzle K, Rock H, Imgart H, Heuschmann P, Unterecker S, Briegel W, Banaschewski T, Fegert JM, Hellenschmidt T, Kaess M, Kölch M, Renner T, Rexroth C, Walitza S, Schulte-Körne G, Romanos M, Egberts KM. Therapeutic Drug Monitoring in Children and Adolescents: Findings on Fluoxetine from the TDM-VIGIL Trial. Pharmaceutics 2023; 15:2202. [PMID: 37765171 PMCID: PMC10534581 DOI: 10.3390/pharmaceutics15092202] [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: 07/19/2023] [Revised: 08/18/2023] [Accepted: 08/19/2023] [Indexed: 09/29/2023] Open
Abstract
Fluoxetine is the recommended first-line antidepressant in many therapeutic guidelines for children and adolescents. However, little is known about the relationships between drug dose and serum level as well as the therapeutic serum reference range in this age group. Within a large naturalistic observational prospective multicenter clinical trial ("TDM-VIGIL"), a transdiagnostic sample of children and adolescents (n = 138; mean age, 15; range, 7-18 years; 24.6% males) was treated with fluoxetine (10-40 mg/day). Analyses of both the last timepoint and all timepoints (n = 292 observations), utilizing (multiple) linear regressions, linear mixed-effect models, and cumulative link (mixed) models, were used to test the associations between dose, serum concentration, outcome, and potential predictors. The receiver operating curve and first to third interquartile methods, respectively, were used to examine concentration cutoff and reference values for responders. A strong positive relationship was found between dose and serum concentration of fluoxetine and its metabolite. Higher body weight was associated with lower serum concentrations, and female sex was associated with lower therapeutic response. The preliminary reference ranges for the active moiety (fluoxetine+norfluoxetine) were 208-328 ng/mL (transdiagnostically) and 201.5-306 ng/mL (depression). Most patients showed marked (45.6%) or minimal (43.5%) improvements and reported no adverse effects (64.9%). This study demonstrated a clear linear dose-serum level relationship for fluoxetine in youth, with the identified reference range being within that established for adults.
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Affiliation(s)
- Michael Frey
- Faculty of Applied Healthcare Science, Deggendorf Institute of Technology, 94469 Deggendorf, Germany
- Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, University Hospital, LMU Munich, 80097 Munich, Germany
| | - Lukasz Smigielski
- Department of Child and Adolescent Psychiatry and Psychotherapy, Psychiatric University Hospital Zurich, University of Zurich, 8032 Zürich, Switzerland; (L.S.)
| | - Elvira Tini
- Department of Child and Adolescent Psychiatry and Psychotherapy, Psychiatric University Hospital Zurich, University of Zurich, 8032 Zürich, Switzerland; (L.S.)
| | - Stefanie Fekete
- Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, Center for Mental Health, University Hospital of Wuerzburg, 97080 Wuerzburg, Germany
| | - Christian Fleischhaker
- Department of Child and Adolescent Psychiatry and Psychotherapy, University Medical Center Freiburg, 79104 Freiburg, Germany
| | | | - Andreas Karwautz
- Department of Child and Adolescent Psychiatry, Medical University Vienna, 1090 Vienna, Austria
| | - Christoph U. Correll
- Department of Child and Adolescent Psychiatry, Charité Universitätsmedizin Berlin, 13353 Berlin, Germany
- Department of Psychiatry, The Zucker Hillside Hospital, Northwell Health, Glen Oaks, NY 11004, USA
- Department of Psychiatry and Molecular Medicine, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Hempstead, NY 11549, USA
| | - Manfred Gerlach
- Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, Center for Mental Health, University Hospital of Wuerzburg, 97080 Wuerzburg, Germany
| | - Regina Taurines
- Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, Center for Mental Health, University Hospital of Wuerzburg, 97080 Wuerzburg, Germany
| | - Paul L. Plener
- Department of Child and Adolescent Psychiatry, Medical University Vienna, 1090 Vienna, Austria
- Department of Child and Adolescent Psychiatry/Psychotherapy, University Hospital Ulm, 89075 Ulm, Germany
| | - Uwe Malzahn
- Clinical Trial Center Wuerzburg, University Hospital Wuerzburg, 97080 Wuerzburg, Germany
| | - Selina Kornbichler
- Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, University Hospital, LMU Munich, 80097 Munich, Germany
| | - Laura Weninger
- Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, University Hospital, LMU Munich, 80097 Munich, Germany
| | | | - Su-Yin Reuter-Dang
- Specialist Practice and Medical Care Centre for Child and Adolescent Psychiatry Munich, Dr. Epple & Dr. Reuter-Dang, 81241 Munich, Germany
| | - Karl Reitzle
- Specialist Practice and Medical Care Center for Child and Adolescent Psychiatry Munich, 81241 Munich, Germany
| | - Hans Rock
- Central Information Office, Department of Neurology, Philipps University of Marburg, 35112 Marburg, Germany
| | - Hartmut Imgart
- Parkland-Clinic, Clinic for Psychosomatics and Psychotherapy, Academic Teaching Hospital for the University Gießen, 34537 Bad Wildungen, Germany
| | - Peter Heuschmann
- Clinical Trial Center Wuerzburg, University Hospital Wuerzburg, 97080 Wuerzburg, Germany
- Institute of Clinical Epidemiology and Biometry, University of Wuerzburg, 97080 Wuerzburg, Germany
| | - Stefan Unterecker
- Department of Psychiatry, Psychosomatics and Psychotherapy, Center of Mental Health, University Hospital of Wuerzburg, 97080 Wuerzburg, Germany
| | - Wolfgang Briegel
- Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, Center for Mental Health, University Hospital of Wuerzburg, 97080 Wuerzburg, Germany
- Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, Leopoldina Hospital, 97422 Schweinfurt, Germany
| | - Tobias Banaschewski
- Department of Child and Adolescent Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, 68159 Mannheim, Germany
| | - Jörg M. Fegert
- Department of Child and Adolescent Psychiatry/Psychotherapy, University Hospital Ulm, 89075 Ulm, Germany
| | - Tobias Hellenschmidt
- Department of Child and Adolescent Psychiatry, Psychotherapy and Psychosomatic medicine, Vivantes Clinic Berlin Neukölln, 12351 Berlin, Germany
| | - Michael Kaess
- Clinic for Child and Adolescent Psychiatry, Center for Psychosocial Medicine, University Hospital Heidelberg, 69115 Heidelberg, Germany
- University Hospital of Child and Adolescent Psychiatry and Psychotherapy, University of Bern, 3000 Bern, Switzerland
| | - Michael Kölch
- Department of Child and Adolescent Psychiatry and Psychotherapy, Brandenburg Medical School Brandenburg, 16816 Neuruppin, Germany
- Department of Child and Adolescent Psychiatry, Neurology, Psychosomatics, and Psychotherapy, University Medical Center Rostock, 18147 Rostock, Germany
| | - Tobias Renner
- Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, University Hospital of Psychiatry and Psychotherapy Tuebingen, Center of Mental Health Tuebingen, 72076 Tuebingen , Germany
| | - Christian Rexroth
- Clinic for Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, University of Regensburg at the Regensburg District Hospital, Medbo KU, 93053 Regensburg, Germany
| | - Susanne Walitza
- Department of Child and Adolescent Psychiatry and Psychotherapy, Psychiatric University Hospital Zurich, University of Zurich, 8032 Zürich, Switzerland; (L.S.)
- Zurich Center for Integrative Human Physiology, University of Zurich, 8057 Zürich, Switzerland
- Neuroscience Center Zurich, University of Zurich and ETH, 8057 Zürich, Switzerland
| | - Gerd Schulte-Körne
- Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, University Hospital, LMU Munich, 80097 Munich, Germany
| | - Marcel Romanos
- Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, Center for Mental Health, University Hospital of Wuerzburg, 97080 Wuerzburg, Germany
| | - Karin Maria Egberts
- Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, Center for Mental Health, University Hospital of Wuerzburg, 97080 Wuerzburg, Germany
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Hutchison L, Hartman JS, Lerea Y. Serotonin Toxicity in Children and Adolescents: A Systematic Review and Meta-Analysis of Cases. J Child Adolesc Psychopharmacol 2021; 31:394-403. [PMID: 33909452 DOI: 10.1089/cap.2020.0176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Objectives: Serotonin toxicity is a state of central nervous system (CNS) excitation classically featuring altered mental status, neuromuscular excitation, and autonomic instability. While retrospective studies and reviews have characterized serotonin toxicity in adults, there have been no systematic reviews of serotonin toxicity in pediatric populations. The goal of this review was to use published case reports to describe serotonin toxicity in pediatric patients and to consider the impact of age on clinical presentation. Methods: A search for case reports of serotonin toxicity in patients younger than 18 years was conducted. Cases were systematically screened for inclusion using serotonin toxicity diagnostic tools, and a meta-analysis of case characteristics was conducted. Results: Sixty-six cases of serotonin toxicity in pediatric patients were reviewed. Only 56.1% met diagnostic criteria for serotonin toxicity on all three of the most commonly used diagnostic tools. Antidepressants were found to be the most common trigger of toxicity, implicated in 78.8% of cases. While onset of toxicity was rapid following overdose, toxicity was more likely to be delayed in the setting of medication titration (71.8% vs. 0%, p < 0.0001). Signs of neuromuscular excitation were prevalent, occurring in 92.4% of cases with 81.8% showing the full triad of neuromuscular symptoms, altered mental status, and autonomic instability. The only age-related differences occurred in relation to activation symptoms (more likely to be reported in children than in adolescents) and seizures (less likely to be reported in children than in adolescents or toddlers). Treatment was primarily supportive in nature, although 25.8% of patients received cyproheptadine. In all but one reviewed case, the patient survived. Conclusions: The presentation of serotonin toxicity in the pediatric population is similar to that seen in adults. Treatment is supportive with most patients achieving full recovery. Further exploration of the age-related differences in serotonin activity within the CNS is needed.
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Affiliation(s)
- Lisa Hutchison
- Department of Psychiatry and Behavioral Sciences, Montefiore Medical Center and Albert Einstein College of Medicine, Bronx, New York, USA
| | - Jacob S Hartman
- Department of Psychiatry and Behavioral Sciences, Montefiore Medical Center and Albert Einstein College of Medicine, Bronx, New York, USA
| | - Yehuda Lerea
- Department of Psychiatry and Behavioral Sciences, Montefiore Medical Center and Albert Einstein College of Medicine, Bronx, New York, USA
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