Related Experiment Video
Updated: Nov 20, 2025
10:33
Expedited Radiation Biodosimetry by Automated Dicentric Chromosome Identification ADCI and Dose Estimation
Published on: September 4, 2017
16.2K
Calculated decisions: DigiFab® (Digibind®) Dosing for Digoxin Poisoning
1Department of Emergency Medicine, University of Calgary, Alberta Health Services; Poison and Drug Information Service (PADIS), Alberta Health Services, Calgary, Alberta, Canada.
Emergency Medicine Practice
|January 21, 2021
Summary
This review examines the DigiFab® dosing calculator, a tool for determining digoxin immune Fab dosage in patients with digoxin poisoning or overdose. It assesses the evidence supporting its use in clinical practice.
Area of Science:
- Pharmacology
- Toxicology
- Clinical Pharmacy
Background:
- Digoxin toxicity is a life-threatening condition requiring prompt and accurate treatment.
- Digoxin immune Fab (Digibind, DigiFab) is the standard antidote for severe digoxin poisoning.
- Accurate dosing of digoxin immune Fab is critical for efficacy and minimizing adverse events.
Purpose of the Study:
- To review the evidence supporting the DigiFab® dosing calculator.
- To evaluate the calculator's reliability and accuracy in determining appropriate digoxin immune Fab doses.
- To provide guidance on the use of the calculator in clinical settings.
Main Methods:
- Literature search for studies evaluating digoxin immune Fab dosing.
- Analysis of evidence supporting the algorithms within the DigiFab® dosing calculator.
- Review of clinical case reports and pharmacokinetic data related to digoxin immune Fab administration.
Main Results:
- The DigiFab® dosing calculator is based on established pharmacokinetic principles and clinical data.
- Evidence suggests the calculator provides reasonable estimates for digoxin immune Fab dosing in most poisoning scenarios.
- Potential limitations and areas for improved accuracy were identified.
Conclusions:
- The DigiFab® dosing calculator is a valuable tool for clinicians managing digoxin poisoning.
- Continued evaluation and potential refinement of the calculator's algorithms are warranted.
- Appropriate use of the calculator aids in optimizing digoxin immune Fab therapy.
Related Concept Videos
01:25Determination of Multiple Dosing Parameters: Loading and Maintenance Doses
91
A loading dose is an essential pharmacological strategy to rapidly achieve the target plasma drug concentration necessary for an immediate therapeutic effect. This approach is especially critical for drugs characterized by slow absorption or extended half-lives, where delaying therapeutic plasma levels could compromise treatment outcomes. By administering a loading dose, clinicians ensure a prompt onset of drug action, even for agents with complex pharmacokinetic profiles.Achieving steady-state...
91
01:15Determination of Multiple Dosing Parameters: Steady-State, Minimum and Maximum Concentrations
91
Gentamicin, an aminoglycoside antibiotic, is commonly administered via intermittent intravenous infusion to treat severe infections. An intermittent one-hour infusion of gentamicin, administered at eight-hour intervals, allows for precise control of plasma drug concentrations, minimizing toxicity while ensuring therapeutic efficacy. Pharmacokinetic principles govern the dynamics of plasma concentrations and can be mathematically described using specific equations.The plasma drug concentration...
91
01:21Dose Size and Dosing Frequency: Determination Methods
102
Determining the optimal dose size and dosing frequency in pharmacotherapy is crucial for achieving therapeutic effectiveness while minimizing adverse effects. This article explores the methodologies employed in determining these parameters, focusing on their significance and interplay to tailor dosing regimens.Dose Size: Dose size refers to the amount of a drug administered in a single dose. It is determined based on the drug's pharmacodynamics and pharmacokinetics properties and...
102
01:11Renal Failure: Dose Adjustments
248
In patients with renal impairment, drugs undergo significant changes in their pharmacokinetics, which require dosage adjustments to ensure safe and effective therapy.
Reduced renal clearance and elimination rate are common outcomes of renal impairment. These alterations lead to a prolonged elimination half-life and an altered apparent volume of distribution for drugs. As a result, dosage adjustments are typically necessary to maintain optimal drug levels in the body.
However, dosage adjustments...
Reduced renal clearance and elimination rate are common outcomes of renal impairment. These alterations lead to a prolonged elimination half-life and an altered apparent volume of distribution for drugs. As a result, dosage adjustments are typically necessary to maintain optimal drug levels in the body.
However, dosage adjustments...
248
01:29Drug Dosing: Infants and Children
105
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...
105
01:19Dosage Interval and Administration Route: Determination Methods
91
A medication’s effectiveness largely depends on its appropriate dosage and the route of administration. Dosage ensures that a sufficient drug concentration is maintained in the bloodstream to elicit the desired therapeutic effect without causing toxicity. The route of administration affects the drug's bioavailability, rate of absorption, and onset of action, which are crucial for achieving optimal therapeutic outcomes. Drug dosage calculations are critical to tailoring therapy to...
91