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Related Concept Videos

Antiepileptic Drugs: GABAergic Pathway Potentiators01:18

Antiepileptic Drugs: GABAergic Pathway Potentiators

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γ-aminobutyric acid or GABA, plays a pivotal role as an inhibitory neurotransmitter in the brain. GABA pathway potentiators, also known as GABAergic drugs, are a class of pharmaceutical agents designed to enhance the functioning of the GABAergic system. These medications primarily treat epilepsy, a neurological disorder characterized by recurrent seizures.
The key GABA pathway potentiators used in epilepsy management are as follows.
Benzodiazepines are a well-known class of drugs used for...
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Anticholinesterase Agents: Poisoning and Treatment01:26

Anticholinesterase Agents: Poisoning and Treatment

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Anticholinesterases, also known as cholinesterase inhibitors, work by blocking the breakdown of acetylcholine, leading to its accumulation in the synaptic cleft. This accumulation indirectly enhances both muscarinic and nicotinic actions. These agents are classified as reversible or irreversible based on their mechanism of action.     
Irreversible agents form a strong bond with the cholinesterase enzyme, making it inactive. The breakdown of the phosphorylated enzyme is...
925
Antiepileptic Drugs: Glutamate Antagonists01:14

Antiepileptic Drugs: Glutamate Antagonists

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Glutamate is a fundamental neurotransmitter in the central nervous system, playing a vital role in neuronal communication and various cognitive processes. Glutamate stands as the principal excitatory neurotransmitter in the brain. Its presence is crucial for the communication between neurons, underpinning essential processes such as synaptic transmission, neuronal excitability, and plasticity. These functions are vital for higher-order cognitive processes, including learning and memory. The...
427
Prevention of Further Absorption of Poison01:14

Prevention of Further Absorption of Poison

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In cases of acute poisoning, the primary objective is to prevent further absorption of the toxic substance into the body. Immediate interventions using various decontamination techniques targeting the gastrointestinal (GI) tract can achieve this. Decontamination is crucial to prevent poison from entering the systemic circulation, which involves washing affected areas with water and mild soap and removing contaminated clothing. Once external decontamination is done, attention must be turned to...
863
Antiepileptic Drugs: Modulators of Neurotransmitter Release Mediated by SV2A Protein01:20

Antiepileptic Drugs: Modulators of Neurotransmitter Release Mediated by SV2A Protein

350
Antiepileptic drugs, such as levetiracetam (Keppra) and brivaracetam (Briviact), have emerged as crucial tools in managing epilepsy. These medications exert their therapeutic effects by targeting the synaptic vesicle protein SV2A, a transmembrane glycoprotein primarily found in the brain.
SV2A is a transmembrane glycoprotein located predominantly in the brain, modulating the release of neurotransmitters for neuronal communication. Both levetiracetam and brivaracetam exhibit a high affinity for...
350
Nonlinear Pharmacokinetics: Dependence of Elimination Half-Life and Dose Clearance01:23

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

208
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...
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Updated: Jul 24, 2025

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Valproate overdose leading to hyperammonaemic encephalopathy.

Deepak S Sharma1, Sandeep Gupta2, Priyanka Sharma3

  • 1Anaesthesia and Critical Care Medicine, Sandwell and West Birmingham NHS Trust, Birmingham, UK deepu84in@gmail.com.

BMJ Case Reports
|July 9, 2023
PubMed
Summary
This summary is machine-generated.

Sodium valproate overdose can cause hyperammonaemic encephalopathy. Prompt recognition and treatment, including supportive care and renal replacement therapy, are crucial for managing this serious side effect.

Keywords:
adult intensive caredrugs: cns (not psychiatric)neurology (drugs and medicines)toxicology

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Area of Science:

  • Neurology
  • Clinical Toxicology

Background:

  • Sodium valproate is a widely used anticonvulsant.
  • Uncommon but serious side effects include hyperammonaemia and encephalopathy.

Observation:

  • A male patient in his early 50s presented with collapse and an empty sodium valproate bottle.
  • The patient developed hyperammonaemic encephalopathy secondary to sodium valproate overdose.

Findings:

  • Hyperammonaemic encephalopathy is a potential complication of sodium valproate overdose.
  • Supportive care and renal replacement therapy were effective in managing the patient's condition.

Implications:

  • Clinicians must be aware of the risk of hyperammonaemic encephalopathy with sodium valproate.
  • Early diagnosis and intervention are vital for favorable outcomes in sodium valproate overdose cases.