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Is Prickly Poppy Toxic to Dogs?

☠️ ToxicSeverity: Moderate
✅ Cross-checked against veterinary poison-control guidance · Oct 2026 audit
⚠️ Educational info only. If your pet just chewed something and looks unwell, skip the reading and call your vet or Pet Poison Helpline (US): (855) 764-7661.
Yes, prickly poppy is toxic to dogs. The yellow latex, seeds and foliage contain sanguinarine-type alkaloids that cause vomiting and diarrhea.

Also known as: Mexican Poppy, Devil’s Fig, Argemone mexicana · Argemone mexicana

What makes it toxic

Sanguinarine, berberine and related isoquinoline alkaloids throughout the plant, densest in seeds. They irritate the GI tract and burden the liver and circulation at high doses.

Warning signs to watch for

Drooling, vomiting, diarrhea and abdominal discomfort within a few hours; bigger meals may add lethargy, trembling and, uncommonly, labored breathing.

What to do if your dog eats it

Take the material away, rinse the mouth and call your vet with the part eaten. Continued vomiting or any trembling and breathing changes mean going in.

Common questions

Can the spines themselves hurt my dog?

The stiff prickles scratch skin and mouths, adding mechanical injury to the chemical one. This weed belongs pulled with gloves and bagged.

Is prickly poppy dangerous dried in hay or clippings?

Yes — the alkaloids persist, and it is a documented hay contaminant. Keep clippings and forage away from pets and livestock.

More plants checked for dogs

Pothos☠️ ToxicYes, pothos is toxic to dogs. Chewing any part of the vine releases calcium oxalate crystals thaAloe Vera⚠️ Mildly ToxicAloe vera is mildly to moderately toxic to dogs. The skin and latex layer of the leaf contain coSpider Plant✅ Non-ToxicNo, spider plants are non-toxic to dogs. A dog that nibbles the arching leaves is not at risk ofEaster Lily⚠️ Mildly ToxicEaster lilies are only mildly toxic to dogs — they usually cause stomach upset, not the fatal kiSago Palm☠️ ToxicYes — sago palm is severely toxic to dogs, with a documented fatality rate around 50% when untreBoston Fern✅ Non-ToxicNo, Boston ferns are non-toxic to dogs. Chewing a frond will not poison your dog.

This page is general educational information, not a substitute for professional veterinary advice. Every pet is different — if your animal ate something concerning, contact your veterinarian or a pet poison hotline right away. Checking what your pet can eat? Visit our sister site SafeOrToxic.