How to Prepare 10 mL of 10% Calcium Gluconate IV Solution
Calcium gluconate 10% solution is commercially available as a ready-to-use formulation and does not require preparation—it comes pre-mixed at 100 mg/mL (10%) in single-dose vials. 1
What You Need to Know
Commercial Availability
- 10% calcium gluconate injection is supplied ready-to-use in single-dose vials of 10 mL (1,000 mg total) 1
- Each mL contains 100 mg of calcium gluconate, which provides 9.3 mg (0.465 mEq) of elemental calcium 1
- The solution appears clear and colorless to slightly yellow 1
Before Administration - Required Dilution
You must dilute the commercial 10% solution before administering it intravenously:
For bolus administration:
- Dilute the dose in 5% dextrose or normal saline to achieve a concentration of 10-50 mg/mL 1
- For example: 10 mL of 10% calcium gluconate (1,000 mg) can be diluted in 50-100 mL of diluent
- Administer slowly, not exceeding 200 mg/minute in adults or 100 mg/minute in pediatric patients 1
For continuous infusion:
- Dilute to a concentration of 5.8-10 mg/mL in 5% dextrose or normal saline 1
- Standard preparation: 100 mL of 10% calcium gluconate (10 vials of 10 mL each) in 1 L of normal saline or 5% dextrose 2
Critical Safety Points
- Use immediately after dilution 1
- Administer via secure IV line to avoid extravasation and tissue necrosis 1
- Monitor ECG during administration, especially for bolus doses 1
- Do NOT mix with: ceftriaxone, bicarbonate-containing fluids, phosphate-containing fluids, or minocycline 1
Clinical Context from Guidelines
For emergency situations like severe hyperkalemia, the 2010 AHA guidelines recommend 15 to 30 mL of 10% calcium gluconate IV over 2 to 5 minutes to stabilize the myocardial cell membrane 3. For calcium channel blocker toxicity, 30-60 mL (3-6 g) every 10-20 minutes or an infusion at 0.6-1.2 mL/kg/hr may be used 4.
Bottom line: You don't "make" the 10% solution—you obtain it commercially pre-made and then dilute it appropriately before IV administration.