Related Experiment Video
Updated: Sep 3, 2026

Sampling Cerebrospinal Fluid and Blood from Lateral Tail Vein in Rats During EEG Recordings
Published on: September 1, 2023
Serum thyroid hormones and blood folic acid during monotherapy with carbamazepine or valproate. A controlled study
Abstract:
Studies investigating the influence of antiepileptic drugs on thyroid hormones usually have compared patients chronically treated with antiepileptic drugs to controls. To date, this type of designs has produced divergent results both with regard to individual drugs and individual thyroid hormones. The present study comprised 31 patients with newly diagnosed epilepsy, commencing treatment with either carbamazepine or valproate. T3, T4, FT4, FT3, rT3, TSH, T3 resin uptake and blood folic acid, were determined before and during antiepileptic monotherapy, thus making the patient his own control. During treatment with carbamazepine, a significant decrease in T4, FT4, FT3, rT3 and TBG was observed. Valproate caused a decrease in T4, FT4 and T3. Neither of the drugs caused any changes in blood folic acid concentrations or persistent increases in the TSH values. None of the patients developed overt symptoms of hypothyreoidism. Conceivable mechanisms underlying these hormonal changes are reviewed.
More Related Videos
Related Concept Videos
Antiepileptic Drugs: Calcium Channel Blockers
Calcium channel blockers exert their antiepileptic effects by targeting T-type calcium channels, which are integral to transmitting nerve signals in the central nervous system. These channels allow the passage of calcium ions, which are vital for neuronal communication. By inhibiting T-type calcium channels, calcium channel blockers effectively reduce the release of neurotransmitters and...
Antiepileptic Drugs: Potassium Channel Activators
Ezogabine has gained approval as an adjunctive treatment...
Therapeutic Drug Monitoring: Affecting Factors
Therapeutic Drug Monitoring: Drug Analysis Methods
Effect of Hepatic Disease on Pharmacokinetics: Pathophysiologic Assessment and Liver Function Test
Graves Disease II: Pathophysiology

