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Antivenom Dose Calculator

Work out antivenom dose instantly with clear inputs, formula shown and shareable results.

About Antivenom Dose Calculator

Totals the reconstituted antivenom and diluent volume and works out the infusion rate, noting that antivenom dosing is by envenoming severity rather than weight.

Formula

Antivenom volume

Total volume = vials x volume per vial + diluent; rate = total volume / infusion hours

Worked example

With the default values below, Antivenom Dose Calculator returns Total infusion volume of 260. Change any input above and every figure here is recalculated in your browser.

Inputs used

Vials in the initial doseaccepts 1–30
6
Volume per reconstituted vialaccepts 1–50 mL
10 mL
Diluent volumeaccepts 0–1,000 mL
200 mL
Infusion timeaccepts 0.25–6 h
1 h

Results

Total infusion volume
260 mL
Infusion rate
260.0 mL/h
Reconstituted antivenom volume
60 mL
Dosing principle
Antivenom dose depends on envenoming severity, not body weight, so children receive the same number of vials as adults

Step by step

  1. 1Values used
  2. 2Antivenom volume
  3. 3Total infusion volume= 260 mL
  4. 4Infusion rate= 260.0 mL/h
  5. 5Reconstituted antivenom volume= 60 mL
  6. 6Dosing principle= Antivenom dose depends on envenoming severity, not body weight, so children receive the same number of vials as adults

Assumptions and limits

  • The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 1 decimal place, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.

Frequently Asked Questions

Why is the dose not weight-based?

The dose must neutralise the venom injected, which does not scale with the victim's size.

What must be ready before infusion?

Adrenaline and resuscitation equipment, because anaphylaxis to antivenom is common.

Related Calculators

Antivenom Dose Calculator – Calculate Total infusion volume