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If your dog ate lance-leaved water plantain — do this now

  1. Take the plant away and clear any pieces from their mouth.
  2. Do not induce vomiting unless told to by a professional.
  3. Call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 now.

Lance-leaved Water Plantain is mildly toxic to dogs (ASPCA).

Pet emergency

My dog ate Lance-leaved Water Plantain — what to do

Step by step

  1. Take lance-leaved water plantain away and remove any plant material from your dog's mouth so they cannot eat more.
  2. Note roughly how much was eaten and when — this helps the vet judge the risk.
  3. Do NOT induce vomiting unless a vet or poison-control specialist tells you to.
  4. Call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 (a consultation fee may apply) and follow their advice.
  5. Watch for drooling, pawing at the mouth, vomiting, loss of appetite, or lethargy, and bring a leaf or photo to the appointment.

This is general guidance, not veterinary advice. Pets vary, and a reaction may be to soil, fertiliser, or pesticide as well as the plant. When in doubt, call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435.

My dog ate lance-leaved water plantain — FAQ

Is lance-leaved water plantain poisonous to dogs?

Yes — the ASPCA lists Lance-leaved Water Plantain (Alisma lanceolatum) as mildly toxic to dogs. Alisma lanceolatum is not individually listed by the ASPCA. Alisma species (Alismataceae) contain saponins and an acrid, irritant juice when fresh that can cause gastrointestinal irritation if ingested in quantity by pets or livestock. The irritant compounds are destroyed by drying or cooking. Treat as mildly toxic and prevent pets from ingesting plant material. No severe or life-threatening toxicity is documented.

How serious is it if my dog ate lance-leaved water plantain?

Lance-leaved Water Plantain is mildly toxic, so most dogs get short-lived mouth irritation, drooling, and vomiting rather than a life-threatening reaction. It is still worth a vet call to be safe, especially if your dog ate a lot or symptoms persist.

What symptoms should I watch for?

Signs usually appear soon after chewing: drooling, pawing at the mouth, vomiting, loss of appetite, or unusual lethargy. Alisma lanceolatum is not individually listed by the ASPCA. Alisma species (Alismataceae) contain saponins and an acrid, irritant juice when fresh that can cause gastrointestinal irritation if ingested in quantity by pets or livestock. The irritant compounds are destroyed by drying or cooking. Treat as mildly toxic and prevent pets from ingesting plant material. No severe or life-threatening toxicity is documented. Any worsening or persistent symptoms warrant an immediate vet visit.

Should I make my dog vomit?

No — do not induce vomiting unless a vet or the ASPCA Animal Poison Control Center specifically tells you to. The wrong action can make things worse. Call (888) 426-4435 and follow professional advice.

How do I stop this happening again?

Keep lance-leaved water plantain well out of reach, or swap it for an ASPCA non-toxic plant — see the best dogs-safe plants list.

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