Calcium salts (gluconate IV / oral carbonate-acetate)

What is this medication for?

• Acute ionized hypocalcemia (tetany/seizures — eclampsia, post-thyroidectomy/parathyroidectomy hypoparathyroidism); hyperkalemic cardioprotection (stabilizes myocardium — buys time, doesn't lower K); calcium-channel-blocker overdose; oral: hypocalcemia maintenance + phosphate binding (acetate: with-meal binder)

How is it given?

Give exactly as your veterinarian prescribed — never change the dose or stop on your own unless your veterinarian has told you to.

• Eclampsia picture (trembling nursing bitch) → warm calcium gluconate slow into a vein to effect → oral maintenance + wean strategy.
• Salt-math trap: gluconate vs chloride elemental-calcium content differ ~3×; and oral dosing ALWAYS rides with vitamin D and away from chelating antibiotics.

What if I miss a dose?

• Give it as soon as you remember — unless it is almost time for the next dose (then skip the missed one; never double up).
• Call your clinic if you miss more than one dose in a row.

Side effects — what should I watch for?

Effects listed as common in this handout

• Bradycardia/arrhythmias, S-T elevation, Q-T shortening (too fast) (The ECG-stop rules)
• Vomiting (oral) (Common)

Worth a phone call to your veterinarian

• Hypercalcemia (over-treatment/oral) (Monitoring-driven)

⚠️ Contact your veterinarian or an emergency clinic IMMEDIATELY if you notice

• Tissue tissue death on perivascular injection (esp. CaCl₂) (Vein discipline)

Before starting (or refilling), tell your veterinarian if your pet:

• has or has had: Ventricular fibrillation; hypercalcemia; digitalis-treated patients (additive arrhythmogenicity — extreme caution)
• has or has had: Renal failure (oral dosing → hypercalcemia); monitor ionized Ca, not total

• is pregnant, nursing, or used for breeding
• is taking any other medications, supplements, or flea/tick products, including:
  • Digitalis (digoxin)
  • Sodium bicarbonate
  • Tetracyclines, fluoroquinolones (oral Ca)
  • Vitamin D/calcitriol
  • Phosphate binders logic

Storage and handling

into a vein: never into a vein-push rapidly; never with bicarbonate in same line (precipitation); extravasation = tissue tissue death (chloride worst).

Good to know

• Hyperkalemia pearl: calcium doesn't fix the potassium — it un-stuns the heart while insulin/dextrose/bicarbonate do the actual work. "Membrane-stabilizer, not corrector."
• Eclampsia picture (trembling nursing bitch) → warm calcium gluconate slow into a vein to effect → oral maintenance + wean strategy.
• Salt-math trap: gluconate vs chloride elemental-calcium content differ ~3×; and oral dosing ALWAYS rides with vitamin D and away from chelating antibiotics.