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Related Concept Videos

Antiepileptic Drugs: Potassium Channel Activators01:20

Antiepileptic Drugs: Potassium Channel Activators

Ezocgabine or retigabine, an antiepileptic drug of remarkable efficacy, has revolutionized the management of seizures. It is a potassium channel activator, explicitly targeting the family of Q subtype potassium channels. It enhances the transmembrane potassium currents, regulating neuronal excitability. This action stabilizes the resting membrane potential, a pivotal factor in mitigating the hyperexcitability that characterizes epilepsy.
Ezogabine has gained approval as an adjunctive treatment...
Mania and Antimanic Drugs: Overview01:24

Mania and Antimanic Drugs: Overview

Mania, a psychological condition characterized by elevated mood, increased energy, and reduced sleep need, is part of the bipolar disorder cycle. The exact cause of mania isn't entirely known, but it is thought to be a combination of genetic, environmental, and neurological factors. Bipolar disorder involves alternating manic and depressive episodes. Mood stabilizers like lithium, antipsychotics, and anticonvulsants help manage these episodes. Lithium carbonate is particularly effective as a...
Nonlinear Pharmacokinetics: Dependence of Elimination Half-Life and Dose Clearance01:23

Nonlinear Pharmacokinetics: Dependence of Elimination Half-Life and Dose Clearance

The elimination half-life and drug clearance of drugs following nonlinear kinetics can vary with dosage. The Michaelis-Menten parameters and drug concentration influence these factors. As the dose increases, the elimination half-life tends to lengthen, resulting in a reduction in clearance and a disproportionately larger area under the curve. The total clearance can be derived from the Michaelis-Menten equation for drugs following a one-compartment model.
A study on guinea pigs examined the...
Drug Dosing: Infants and Children01:29

Drug Dosing: Infants and Children

Pediatric patient dosages diverge from adults due to disparities in body surface area, total body water, and extracellular fluid per kilogram of body weight. The dosing regimen considers the variations in pharmacokinetics and pharmacology across distinct age groups, encompassing preterm newborns, infants, young children, older children, and adolescents. Calculation of pediatric patient doses is predicated on determining body surface area, which exhibits a superior correlation with the child's...
Teratogenicity01:07

Teratogenicity

The ability of a drug to produce structural deformations and functional abnormalities in the developing embryo or the fetus is called teratogenicity, and the drug producing this effect is known as a teratogen. Teratogenic effects include stillbirth, miscarriage, intrauterine growth restriction, and neurocognitive delay. A teratogen may affect the embryo at different stages of development, which is important in determining the type and extent of the damage. During blastocyst formation, the early...
Drug Accumulation During Multiple Dosing: Intermittent IV Infusions01:24

Drug Accumulation During Multiple Dosing: Intermittent IV Infusions

Intermittent intravenous (IV) infusion is a method of drug administration where medications are delivered over short infusion periods followed by intervals of no drug delivery. This approach helps to prevent sustained high drug concentrations in the bloodstream, reducing the risk of adverse effects associated with prolonged exposure. Unlike continuous infusion, steady-state concentrations may not be achieved during a single dosing cycle but can be reached through repeated...

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Related Experiment Video

Updated: Jul 4, 2026

Behavioral Characterization of Pentylenetetrazole-induced Seizures: Moving Beyond the Racine Scale
07:35

Behavioral Characterization of Pentylenetetrazole-induced Seizures: Moving Beyond the Racine Scale

Published on: July 8, 2025

Zonisamide concentrations during pregnancy.

Karen S Oles1, William L Bell

  • 1Department of Neurology, Pharmacy Education, Northwest Area Health Education Center, School of Medicine, Wake Forest University, Winston-Salem, NC 27157, USA. koles@wfubmc.edu

The Annals of Pharmacotherapy
|June 26, 2008
PubMed
Summary
This summary is machine-generated.

Zonisamide serum concentrations varied during pregnancy, decreasing significantly at 27 weeks before increasing after a dose adjustment. This suggests increased zonisamide clearance in late pregnancy.

More Related Videos

Behavioral And Physiological Analysis In A Zebrafish Model Of Epilepsy
08:26

Behavioral And Physiological Analysis In A Zebrafish Model Of Epilepsy

Published on: October 19, 2021

Related Experiment Videos

Last Updated: Jul 4, 2026

Behavioral Characterization of Pentylenetetrazole-induced Seizures: Moving Beyond the Racine Scale
07:35

Behavioral Characterization of Pentylenetetrazole-induced Seizures: Moving Beyond the Racine Scale

Published on: July 8, 2025

Behavioral And Physiological Analysis In A Zebrafish Model Of Epilepsy
08:26

Behavioral And Physiological Analysis In A Zebrafish Model Of Epilepsy

Published on: October 19, 2021

Area of Science:

  • Pharmacokinetics
  • Pregnancy
  • Epilepsy Management

Background:

  • Zonisamide is an antiepileptic drug used for seizure control.
  • Limited data exist on zonisamide pharmacokinetics during pregnancy.

Observation:

  • A 30-year-old pregnant woman with epilepsy continued zonisamide monotherapy.
  • Serum zonisamide levels ranged from 7.5 to 17 microg/mL, with a notable drop to 4.4 microg/mL at 27 weeks.
  • The dose was increased, resulting in a post-delivery concentration of 20.8 microg/mL.

Findings:

  • Zonisamide clearance appears to increase in late pregnancy, indicated by the drop in serum concentration.
  • Dose adjustment may be necessary to maintain therapeutic levels during pregnancy.

Implications:

  • This case highlights the need for therapeutic drug monitoring of zonisamide in pregnant women.
  • Further research is warranted to understand zonisamide pharmacokinetics and optimize its use in pregnancy.