Calcium Gluconate Injection: IV Dose and Administration
Calcium gluconate guidance for severe hypocalcaemia and magnesium sulfate intoxication, with IV-only use and hypercalcaemia precautions.
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Source reviewed
November 2022
Guide category
Injectable drugs
Safety boundary
Prescription medicine information for clinician-guided use.
Kenza Health Hub presents this medicine page as structured health education. Check dose, route, interactions, pregnancy or breast-feeding considerations, and local protocol with a qualified clinician or pharmacist. Read our medical editorial policy.
Quick clinical summary
| Item | Summary |
|---|---|
| Drug | Calcium gluconate |
| Common form | 10% injection, 1 g/10 ml |
| Route | Slow IV injection or IV infusion |
| Key uses | Severe hypocalcaemia; magnesium sulfate intoxication |
| IM/SC use | No |
| Major administration concern | Extravasation, rapid administration, and incompatibilities |
| Monitoring | Clinical response, infusion site, and plasma-calcium levels where required |
Clinical context from Kenza
The sections below add practical explanation around the source-derived monograph. They are educational context and do not replace local protocols or clinician review.
Calcium gluconate 10% explained
The different strength descriptions on calcium gluconate ampoules can look like separate doses, but they are usually describing the same product from different angles.
| Label wording | What it means |
|---|---|
| 10% solution | 10 g per 100 ml of solution. |
| 100 mg/ml | Each 1 ml contains 100 mg of calcium gluconate. |
| 1 g/10 ml | A 10 ml ampoule contains 1 g total calcium gluconate. |
Calcium gluconate vs calcium chloride
Calcium gluconate and calcium chloride are both injectable calcium salts, but they are not interchangeable millilitre-for-millilitre. Calcium chloride provides more elemental calcium in a 10% solution and is more irritating to tissues if extravasation occurs, so local protocols and route suitability matter.
For Kenza readers, the practical point is simple: use the exact salt, concentration, dose, route, and dilution method specified by the prescribing clinician or emergency protocol.
What clinicians monitor during IV calcium
Monitoring matters because IV calcium can correct dangerous symptoms but can also cause harm if administered too quickly, continued too long, or given through an unsafe line.
Clinicians usually watch the patient's symptoms and vital signs, the IV site, compatibility with other infusions, and calcium levels when treatment is prolonged or repeated.
Therapeutic action
Calcium therapy.
Antidote to magnesium sulfate.
Indications
- Severe hypocalcaemia.
- Magnesium sulfate intoxication.
Forms and strengths, route of administration
- 1 g ampoule, 100 mg/ml, 10 ml, 10% solution, for slow IV injection or infusion in 5% glucose or 0.9% sodium chloride or Ringer lactate.
- Never use by IM or SC injection.
Dose
Severe hypocalcaemia
- Neonate and child under 20 kg: 0.5 ml/kg, maximum 10 ml, by slow IV injection over at least 5 minutes, then 2 to 4 ml/kg, maximum 40 ml, by continuous infusion over 24 hours.
- Child 20 kg and over and adult: 10 ml by slow IV injection over at least 5 minutes, then 40 ml by continuous infusion over 24 hours.
Magnesium sulfate intoxication
- Child under 20 kg: 0.5 ml/kg, maximum 10 ml, by slow IV injection over at least 5 minutes.
- Child 20 kg and over and adult: 10 ml by slow IV injection over at least 5 minutes.
Duration
According to clinical response and plasma-calcium levels. For hypocalcaemia, change to oral route as soon as possible.
Contra-indications, adverse effects, precautions
- Do not administer to patients with severe renal disease or patients receiving cardiac glycosides.
- Do not administer ceftriaxone to neonates receiving calcium gluconate.
- May cause tingling sensations, warm flushes, dizziness, tissue necrosis in the event of extravasation, and hypercalcaemia in the event of too rapid IV injection or overtreatment.
- Do not use in prolonged treatment if plasma-calcium levels cannot be monitored.
- The patient should be placed in the horizontal position prior to injection and remain lying down for 30 to 60 minutes.
- Pregnancy and breast-feeding: no contra-indication.
- Calcium gluconate is incompatible with many drugs. Do not mix with other drugs in the same syringe or infusion fluid and flush the IV line thoroughly between infusions.
- Do not use if the solution appears cloudy or particles are visible.
Frequently Asked Questions
Calcium gluconate injectable dose and administration questions
What is calcium gluconate injection used for?
Calcium gluconate injection is listed for severe hypocalcaemia and as an antidote to magnesium sulfate intoxication.
How is calcium gluconate IV administered?
The listed form is a 10% solution for slow IV injection or infusion in 5% glucose, 0.9% sodium chloride, or Ringer lactate. It should never be given by IM or SC injection.
What is the calcium gluconate dose for severe hypocalcaemia?
For neonates and children under 20 kg, the guide lists 0.5 ml/kg by slow IV injection over at least 5 minutes, then continuous infusion over 24 hours. For children 20 kg and over and adults, it lists 10 ml by slow IV injection over at least 5 minutes, then 40 ml by continuous infusion over 24 hours.
What precautions matter during calcium gluconate IV infusion?
The page notes monitoring needs, hypercalcaemia risk with rapid IV injection or overtreatment, extravasation risk, line flushing between infusions, and avoiding mixing calcium gluconate with other drugs in the same syringe or infusion fluid.
Source
MSF Essential drugs practical guidelines (January 2026)
This page combines source-derived medicine reference sections with Kenza editorial context, while leaving out the Storage and Remarks sections from the source batch.
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