Are Calcium Channel Blockers toxic to dogs?

Extreme severity No safe amount — No amount is considered safe.

Yes, Calcium Channel Blockers are extremely toxic to dogs. Even a small amount can be life-threatening, so treat any exposure as an emergency and contact a vet immediately. No amount is considered safe.

Symptoms to watch for

Nausea
Vomiting
Weakness
Collapse
Slowed heart rate
Lethargy
Hypotension
Heart failure
Acute kidney failure

How vets treat it

Immediate decontamination, heart and blood pressure monitoring, aggressive IV fluids, and potentially calcium, glucagon, high-dose insulin therapy, or intravenous lipid emulsion.

Why it's dangerous

These medications have a narrow margin of safety and cause toxicity by severely slowing the heart rate and lowering blood pressure, potentially leading to heart and kidney failure.

Toxic compound: Calcium channel blockers

Good to know

These drugs have a narrow margin of safety; even a small amount can result in severe, life-threatening poisoning.

Sources

Pet Poison Helpline

This page is informational and is not veterinary advice. If your pet has been exposed to something risky, contact your vet or an animal poison control line right away.

The StrawPaw Team · How we prepare our guides

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