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Related Concept Videos

Hypoglycemia and Glucagon01:15

Hypoglycemia and Glucagon

Without prolonged fasting, healthy individuals maintain blood glucose levels above 3.5 mM due to a well-adapted neuroendocrine counterregulatory system that effectively prevents acute hypoglycemia, a potentially life-threatening condition. The primary clinical scenarios for hypoglycemia encompass diabetes treatment, inappropriate production of endogenous insulin or insulin-like substances by tumors, and the use of glucose-lowering agents in non-diabetic individuals. Notably, hypoglycemia in the...
Hypoglycemia01:26

Hypoglycemia

Hypoglycemia is a blood glucose level below 70 mg/dL. It commonly occurs in individuals using insulin or insulin-secreting drugs, but may also arise in non-diabetic conditions. People with type 1 diabetes are at the highest risk because they depend on exogenous insulin. People with type 2 diabetes are also at risk, especially when treated with insulin or medications such as sulfonylureas, which increase insulin release regardless of blood glucose levels. It develops when insulin levels exceed...
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...
Hyperglycemia01:29

Hyperglycemia

Hyperglycemia is an abnormally high blood glucose level. It is diagnosed by fasting glucose ≥126 mg/dL, 2-hour oral glucose tolerance test (or OGTT) ≥200 mg/dL, random glucose ≥200 mg/dL with symptoms, or HbA1c ≥6.5%. However, HbA1c results may be unreliable in certain conditions, such as anemia or hemoglobinopathies, and the diagnosis should be confirmed unless classic symptoms are present. Postprandial hyperglycemia is typically considered significant when glucose levels exceed 180 mg/dL two...
Desensitization and Tachyphylaxis01:20

Desensitization and Tachyphylaxis

Tachyphylaxis is described as a rapid decrease in response to a drug after repeated or continuous administration of the same drug dose. It is a phenomenon where the body becomes less responsive to a particular substance or intervention over time, requiring higher doses or stronger interventions to achieve the same effect. It results from adaptive changes in the body's receptors, signaling pathways, or physiological processes that occur in response to prolonged exposure to a stimulus.
Several...
Toxidromes: Clinical Features01:30

Toxidromes: Clinical Features

Toxidromes are specific patterns of symptoms resulting from toxic substance exposure. They help in the identification and treatment of poisoning. The symptoms of each toxidrome group indicate poisoning by a certain class of chemicals or drugs.1. Sympathomimetic: Stimulates the sympathetic nervous system. Symptoms include agitation, increased heart rate (HR), blood pressure (BP), respiratory rate (RR), temperature, and pupil size. Drugs like cocaine and amphetamines, along with tremors and...

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Related Experiment Videos

Severe hypoglycaemia in citalopram overdose.

Russell A Duncan1, Peter A R Armstrong, Brodie Paterson

  • 1Accident and Emergency, Ninewells Hospital, Dundee, UK. russellduncan@nhs.net

European Journal of Emergency Medicine : Official Journal of the European Society for Emergency Medicine
|December 17, 2008
PubMed
Summary

Two poisoning cases revealed profound hypoglycemia as a key symptom of citalopram overdose. This previously undocumented side effect is a critical, treatable cause of seizures in selective serotonin reuptake inhibitor toxicity.

Related Experiment Videos

Area of Science:

  • Toxicology
  • Pharmacology
  • Emergency Medicine

Background:

  • Selective serotonin reuptake inhibitors (SSRIs) are commonly prescribed antidepressants.
  • Citalopram is an SSRI known for its potential toxicity in overdose scenarios.

Observation:

  • Two patients presented with severe hypoglycemia following citalopram overdose.
  • Hypoglycemia was the predominant clinical feature in both cases.

Findings:

  • Profound hypoglycemia is a significant, previously undocumented manifestation of citalopram toxicity.
  • This finding expands the known toxicological profile of citalopram.

Implications:

  • Clinicians should consider hypoglycemia in patients with citalopram overdose, especially those with altered mental status or seizures.
  • Prompt recognition and management of hypoglycemia can prevent severe neurological complications.
  • Poisoning information resources should be updated to include hypoglycemia as a key feature of citalopram overdose.