My dog ate iron supplements / prenatal vitamins — what should I do?
Depends on the dose — check the calculator
What to do now
- Risk depends on how much elemental iron your dog ate per kg of body weight (0 mg/kg → YELLOW, 50 mg/kg → RED). Use the PawPanic calculator with your dog's weight and the amount.
- If you can't estimate the amount, assume the worst and call your vet or a poison hotline.
- Remove any remaining material and keep packaging/labels — the vet will want product names and amounts.
- Do not induce vomiting unless a vet or poison-control expert tells you to.
- Note the time it was eaten, roughly how much, and your dog's weight.
Why it's a problem
Iron overdose irritates the gut and can damage the liver.
Symptoms to watch for
Vomiting (may be bloody), diarrhea, lethargy, later liver failure.
When: Within 6 hours; liver 1-3 days
⚠️ Tablet setting assumes 65 mg elemental iron (325 mg ferrous sulfate); check your label.
Frequently asked questions
Is iron supplements / prenatal vitamins dangerous for dogs?
It depends on the amount and your dog's weight. Iron overdose irritates the gut and can damage the liver. Use the PawPanic calculator or call your vet.
What are the symptoms if my dog ate iron supplements / prenatal vitamins?
Vomiting (may be bloody), diarrhea, lethargy, later liver failure.
How soon do symptoms appear after a dog eats iron supplements / prenatal vitamins?
Within 6 hours; liver 1-3 days
Is there anything else to know about iron supplements / prenatal vitamins?
Tablet setting assumes 65 mg elemental iron (325 mg ferrous sulfate); check your label.
What should I do if my dog ate iron supplements / prenatal vitamins?
If you can't estimate the amount, assume the worst and call your vet or a poison hotline.
Who can I call for help?
ASPCA Animal Poison Control (888) 426-4435 or Pet Poison Helpline (855) 764-7661, both 24/7 (fees may apply), or your nearest emergency vet.
Dose guidance
Merck: elemental iron >50 mg/kg warrants decontamination; >80 mg/kg needs further treatment. Enter mg of ELEMENTAL iron from the label.
Sources
Last verified against these sources: 2026-10-13. Where sources disagree, PawPanic uses the more conservative guidance.
Also known as: prenatal vitamins, ferrous sulfate, iron pills · Category: Medication · Last reviewed 2026-10-14