10%, 1gram in 10mL (6.8 mmol in 10mL) vial


Calcium supplementation is recommended in the management of verapamil and diltiazem overdose along with appropriate inotropic and vasopressor therapy as indicated.

10% calcium chloride contains three times the elemental calcium in the same volume of 10% calcium gluconate.

Medication box with the name Calcium Chloride. A vial next to the box.

Consultation with a clinical toxicologist through the local toxicology service or Poisons Information Centre on 13 11 26 is advised with all symptomatic calcium channel blocker poisonings.


10%, 10mL (6.8mmol calcium) [child: 0.2 mL/kg] IV, repeat q5min aiming for an ionised Ca between 1.5-2.0mmol/L.

Stocking recommendations

Calcium chloride is readily available given it is a standard resuscitation drug.


Calcium chloride is irritating to veins. It is ideally given via central access, but in an emergency may be given peripherally through a proximal large bore cannula, while central access is gained.


Fact sheet developed by Queensland Poisons Information Centre.

This fact sheet is about the use of these antidotes in Australia, and may not apply to other countries. Children’s Health Queensland Hospital and Health Service cannot be held responsible for the accuracy of information, omissions of information, or any actions that may be taken as a consequence of reading this fact sheet.

Last updated: May 2024