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If your cat ate swamp loosestrife — 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 now. If you cannot reach one, a poison-control line will triage you — ASPCA Animal Poison Control Center on (888) 426-4435 in the US, or Animal PoisonLine on 01202 509 000 in the UK. Both services charge a fee.

Swamp Loosestrife is mildly toxic to cats (ASPCA).

Pet emergency

My cat ate Swamp Loosestrife — what to do

Step by step

  1. Take swamp loosestrife away and remove any plant material from your cat'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 a poison-control line — (888) 426-4435 in the US, or Animal PoisonLine on 01202 509 000 in the UK. Both charge a consultation fee. 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 in the US, or Animal PoisonLine on 01202 509 000 in the UK.

My cat ate swamp loosestrife — FAQ

Is swamp loosestrife poisonous to cats?

Yes — Swamp Loosestrife (Decodon verticillatus) is regarded as mildly toxic to cats, based on genus- and family-level toxicity data. Decodon verticillatus is not listed on the ASPCA toxic-plant database and no documented pet toxicity cases are reported. However, it belongs to Lythraceae and no confirmed safety data exists for cats and dogs, so it is classified as mildly-toxic as a precaution. Keep pets away from plants in and around water features for general safety.

How serious is it if my cat ate swamp loosestrife?

Swamp Loosestrife is mildly toxic, so most cats 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 cat 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. Decodon verticillatus is not listed on the ASPCA toxic-plant database and no documented pet toxicity cases are reported. However, it belongs to Lythraceae and no confirmed safety data exists for cats and dogs, so it is classified as mildly-toxic as a precaution. Keep pets away from plants in and around water features for general safety. Any worsening or persistent symptoms warrant an immediate vet visit.

Should I make my cat vomit?

No — do not induce vomiting unless a vet or a poison-control specialist specifically tells you to. The wrong action can make things worse. Call your vet, or (888) 426-4435 in the US, or Animal PoisonLine on 01202 509 000 in the UK, and follow professional advice.

How do I stop this happening again?

Keep swamp loosestrife well out of reach, or swap it for an ASPCA non-toxic plant — see the best cats-safe plants list.

Type any plant to see what the ASPCA says about it and your cat.

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