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Related Concept Videos

Antihypertensive Drugs: Potassium-Sparing Diuretics01:28

Antihypertensive Drugs: Potassium-Sparing Diuretics

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Liddle syndrome is a genetically inherited form of hypertension characterized by the overactivity of epithelial sodium channels in the nephron, the functional unit of the kidney. This heightened activity leads to increased sodium reabsorption and excessive excretion of potassium. To counteract this, potassium-sparing diuretics such as amiloride are used. They function by blocking these sodium channels, thereby reducing the influx of sodium into the epithelial cells and minimizing the loss of...
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Antiarrhythmic Drugs: Class II Agents as β-Adrenergic Blockers01:24

Antiarrhythmic Drugs: Class II Agents as β-Adrenergic Blockers

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Adrenergic stimulation generally impacts cardiac rate and rhythm. Specifically, stimulation of the β-adrenoceptors triggers an increase in intracellular calcium ion influx and pacemaker currents, which may cause arrhythmias. Catecholamines like adrenaline also demonstrate β2-adrenoceptor-mediated hypokalemia, impacting cardiac action potential and disrupting the normal cardiac rhythm. Class II antiarrhythmic drugs are β-adrenoceptor antagonists or β-blockers, which...
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Antiepileptic Drugs: Potassium Channel Activators01:20

Antiepileptic Drugs: Potassium Channel Activators

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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...
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Antiarrhythmic Drugs: Class III Agents as Potassium Channel Blockers01:12

Antiarrhythmic Drugs: Class III Agents as Potassium Channel Blockers

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Class III antiarrhythmic drugs are a group of medications that can prolong action potentials in the heart. They achieve this by blocking potassium channels or enhancing inward currents from sodium channels. However, these drugs have a unique property of "reverse use-dependence," which is most pronounced at slower heart rates and can lead to torsades de pointes—a specific type of arrhythmia. However, it is essential to note that excessive QT interval prolongation—a measure of...
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Renal Drug Excretion: Effect of Urine pH, Flow Rate, and Drug pKa01:22

Renal Drug Excretion: Effect of Urine pH, Flow Rate, and Drug pKa

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The pH of urine, the drug's pKa, and the urine flow rate are vital parameters for drug reabsorption and excretion. Urinary pH varies between 4.6 and 8.0 and is influenced by diet, drug intake, and the patient's pathophysiology. It affects a drug's ionization state and reabsorption. For instance, carbohydrate-rich food produces alkaline urine promoting drug excretion, while proteins and certain medications like ascorbic acid lead to acidic urine enhancing reabsorption.
The pKa of a...
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Drug Elimination by Renal Route: Tubular Reabsorption01:22

Drug Elimination by Renal Route: Tubular Reabsorption

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During the process of renal excretion, as the glomerular filtrate progresses to the distal convoluted tubule (DCT), drugs that are highly permeable, lipophilic, and nonionized undergo passive reabsorption from the tubular fluid into the surrounding peritubular capillaries. This reabsorption process restricts their elimination through the kidneys. However, the majority of drugs are either weak acids or weak bases, and their ionization level is dependent on pH. By altering the pH of urine, the...
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Related Experiment Video

Updated: Jun 16, 2025

Voltage-Dependent Potassium Current Recording on H9c2 Cardiomyocytes via the Whole-Cell Patch-Clamp Technique
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Beta-lactam-associated hypokalemia.

Muriel-N Jansen1, Wajima Safi1, Igor Matyukhin1

  • 1Department of Internal Medicine I - Cardiology, Nephrology and Internal Intensive Medicine Brandenburg University Hospital, Brandenburg Medical School (Theodor Fontane), Brandenburg an der Havel, Germany.

The Journal of International Medical Research
|August 20, 2024
PubMed
Summary
This summary is machine-generated.

Beta-lactam antibiotics can cause hypokalemia, a dangerous drop in potassium levels. This review highlights that this side effect remains clinically relevant, with potential incidence up to 40%.

Keywords:
Hypokalemiaazlocillinbeta-lactamsnon-reabsorbable anionspenicillin Gpiperacillinticarcillin

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Area of Science:

  • Pharmacology
  • Nephrology
  • Internal Medicine

Background:

  • Hypokalemia is a significant electrolyte disturbance.
  • Beta-lactam antibiotics are widely used for bacterial infections.
  • Therapy-associated hypokalemia is a recognized but often overlooked adverse effect.

Purpose of the Study:

  • To review and synthesize existing literature on beta-lactam antibiotic-associated hypokalemia.
  • To highlight the clinical relevance and potential incidence of this adverse effect.
  • To emphasize the importance of considering beta-lactam-induced hypokalemia in unexplained cases.

Main Methods:

  • Narrative review of studies published between 1965 and 2023.
  • Searched PubMed, Web of Science, Cochrane Library, and Scopus databases.
  • Included human studies and case reports; excluded animal-based studies.

Main Results:

  • Both older and current beta-lactam antibiotics are associated with hypokalemia.
  • The incidence of beta-lactam-associated hypokalemia may reach up to 40%.
  • This electrolyte disorder remains a clinically relevant issue.

Conclusions:

  • Beta-lactam antibiotic-associated hypokalemia is a potentially life-threatening condition.
  • Clinicians should consider beta-lactam-induced renal potassium loss in unexplained hypokalemia.
  • Early recognition and management are crucial for patient safety.