Antiseizure medication effect-dosage on thyroid function in pediatric patients with epilepsy: Data analysis
Keywords:
antiseizure medication, thyroid, epilepsy, childrenAbstract
Background and aim: The potential influence of antiseizure medications on thyroid function and subsequent alterations in thyroid hormone synthesis and metabolism has been reported. This study investigates the correlation between some commonly used antiseizure medication administration and thyroid hormone effects in pediatric patients.
Methods: A retrospective analysis was conducted involving 41 pediatric patients diagnosed with various types of epilepsy, receiving diagnosis and treatment at the Pediatric Operative Unit of the 'G. Rodolico-San Marco' Hospital, Catania, Italy. The patients were categorized based on epilepsy type, focusing on the impact of widely used antiseizure medication—valproate and levetiracetam—by assessing drug dosages proportionally adjusted to body weight (pro/kg) in relation to thyroid-stimulating hormone (TSH) and free thyroid hormone (T4) levels.
Results: The results showed no significant linear correlation between drug dosages and thyroid parameters, suggesting that other factors as genetic predisposition, individual metabolic variations, and drug interactions may contribute to thyroid parameter alterations in children undergoing antiseizure medication.
Conclusions: Further comprehensive studies are warranted to unravel the underlying mechanisms and effects of additional variables, essentials for optimizing therapeutic approaches in treatment of children with epilepsy.
References
1. Fisher RS, Acevedo C, Arzimanoglou A, et al. ILAE official report: a practical clinical definition of epilepsy. Epilepsia. 2014;55:475-82. doi: 10.1111/epi.12550.
2. Hauser WA, Annegers JF, Rocca WA. Descriptive epidemiology of epilepsy: contributions of population-based studies from Rochester, Minnesota. Mayo Clin Proc. 1996;71:576-86. doi: 10.4065/71.6.576.
3. Scheffer IE, Berkovic S, Capovilla G, et al. ILAE classification of the epilepsies: position paper of the ILAE Commission for Classification and Terminology. Epilepsia. 2017;58:512-21. doi: 10.1111/epi.13709.
4. Chaplin S. Updated guideline on diagnosing and managing epilepsies. Prescriber. 2022;33:28-30. doi: 10.1002/psb.2010.
5. Verrotti A, Scardapane A, Manco R, Chiarelli F. Antiepileptic drugs and thyroid function. J Pediatr Endocrinol Metab. 2008;21:401-8. doi: 10.1515/jpem.2008.21.5.401.
6. Löscher W, Potschka H, Sisodiya SM, Vezzani A. Drug resistance in epilepsy: clinical impact, potential mechanisms, and new innovative treatment options. Pharmacol Rev. 2020;72:606-38. doi: 10.1124/pr.120.019539.
7. Sankaraneni R, Lachhwani D. Antiepileptic drugs—a review. Pediatr Ann. 2015;44:e36-42. doi: 10.3928/00904481-20150203-10.
8. Błaszczyk B, Lasoń W, Czuczwar SJ. Antiepileptic drugs and adverse skin reactions: an update. Pharmacol Rep. 2015;67:426-34. doi: 10.1016/j.pharep.2014.11.009.
9. Thigpen J, Miller SE, Pond BB. Behavioral side effects of antiepileptic drugs. US Pharm. 2013;38:HS15-HS20.
10. Verrotti A, Laus M, Scardapane A, Franzoni E, Chiarelli F. Thyroid hormones in children with epilepsy during long-term administration of carbamazepine and valproate. Eur J Endocrinol. 2009;160:81-6. doi: 10.1530/EJE-08-0325.
11. de Vries L, Karasik A, Landau Z, et al. Endocrine effects of valproate in adolescent girls with epilepsy. Epilepsia. 2007;48:470-7. doi: 10.1111/j.1528-1167.2006.00953.x.
12. Goldberg-Stern H, Yaacobi E, Phillip M, de Vries L. Endocrine effects of valproic acid therapy in girls with epilepsy: a prospective study. Eur J Paediatr Neurol. 2014;18:759-65. doi: 10.1016/j.ejpn.2014.07.004.
13. Kim SH, Chung HR, Kim SH, et al. Subclinical hypothyroidism during valproic acid therapy in children and adolescents with epilepsy. Neuropediatrics. 2012;43:135-9. doi: 10.1055/s-0032-1313913.
14. Ilić V, Bogićević D, Miljković B, et al. Duration of valproic acid monotherapy correlates with subclinical thyroid dysfunction in children with epilepsy. Epileptic Disord. 2016;18:181-6. doi: 10.1684/epd.2016.0821.
15. Castro-Gago M, Novo-Rodríguez MI, Gómez-Lado C, et al. Evolution of subclinical hypothyroidism in children treated with antiepileptic drugs. Pediatr Neurol. 2007;37:426-30. doi: 10.1016/j.pediatrneurol.2007.07.003.
16. Hirfanoglu T, Serdaroglu A, Camurdan O, et al. Thyroid function and volume in epileptic children using carbamazepine, oxcarbazepine and valproate. Pediatr Int. 2007;49:822-6. doi: 10.1111/j.1442-200X.2007.02456.x.
17. Mikati MA, Tarabay H, Khalil A, et al. Risk factors for development of subclinical hypothyroidism during valproic acid therapy. J Pediatr. 2007;151:178-81. doi: 10.1016/j.jpeds.2007.02.046.
18. Sahu JK, Gulati S, Kabra M, et al. Evaluation of subclinical hypothyroidism in ambulatory children with controlled epilepsy on valproate monotherapy. J Child Neurol. 2012;27:594-7. doi: 10.1177/0883073811421985.
19. Park SM, Chatterjee VK. Genetics of congenital hypothyroidism. J Med Genet. 2005;42:379-89. doi: 10.1136/jmg.2004.024158.
20. Almandoz JP, Gharib H. Hypothyroidism: etiology, diagnosis, and management. Med Clin North Am. 2012;96:203-21. doi: 10.1016/j.mcna.2012.01.005.
21. Jonklaas J, Bianco AC, Bauer AJ, et al. Guidelines for the treatment of hypothyroidism: prepared by the American Thyroid Association Task Force on thyroid hormone replacement. Thyroid. 2014;24:1670-751. doi: 10.1089/thy.2014.0028.
22. Rabbiosi S, Vigone MC, Cortinovis F, et al. Congenital hypothyroidism with eutopic thyroid gland: analysis of clinical and biochemical features at diagnosis and after re-evaluation. J Clin Endocrinol Metab. 2013;98:1395-402. doi: 10.1210/jc.2012-3174.
23. Castanet M, Goischke A, Léger J, et al. Natural history and management of congenital hypothyroidism with in situ thyroid gland. Horm Res Paediatr. 2015;83:102-10. doi: 10.1159/000362234.
24. Isojärvi JI, Turkka J, Pakarinen AJ, et al. Thyroid function in men taking carbamazepine, oxcarbazepine, or valproate for epilepsy. Epilepsia. 2001;42:930-4. doi: 10.1046/j.1528-1157.2001.042007930.x.
25. Aygün F, Ekici B, Aydinli N, et al. Thyroid hormones in children on antiepileptic therapy. Int J Neurosci. 2012;122:69-73. doi: 10.3109/00207454.2011.627486.
26. Shi KL, Guo JX, Zhao HM, et al. The effect of levetiracetam and oxcarbazepine monotherapy on thyroid hormones and bone metabolism in children with epilepsy: a prospective study. Epilepsy Behav. 2020;113:107555. doi: 10.1016/j.yebeh.2020.107555.
27. Nishiyama M, Takami Y, Ishida Y, et al. Lipid and thyroid hormone levels in children with epilepsy treated with levetiracetam or carbamazepine: a prospective observational study. Epilepsy Behav. 2019;90:15-9. doi: 10.1016/j.yebeh.2018.11.003.
28. Yılmaz U, Yılmaz TS, Akıncı G, et al. The effect of antiepileptic drugs on thyroid function in children. Seizure. 2014;23:29-35. doi: 10.1016/j.seizure.2013.09.006.
29. Elshorbagy HH, Barseem NF, Suliman HA, et al. The impact of antiepileptic drugs on thyroid function in children with epilepsy: new versus old. Iran J Child Neurol. 2020;14:31-41.
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2025 Piero Pavone, Alberto Verrotti, Giovanni Battista Dell'Isola, Ottavia Avola, Manuela Lo Bianco, Marco Giaimi, Alessandra Di Nora, Pietro Ferrara, Tiziana Timpanaro

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Transfer of Copyright and Permission to Reproduce Parts of Published Papers.
Authors retain the copyright for their published work. No formal permission will be required to reproduce parts (tables or illustrations) of published papers, provided the source is quoted appropriately and reproduction has no commercial intent. Reproductions with commercial intent will require written permission and payment of royalties.