Is Theobromine (Methylxanthine) toxic to pets?
Informational reference only — not veterinary advice, and not a diagnosis. If you suspect your pet ingested theobromine (methylxanthine), contact your veterinarian or an animal poison-control center immediately. Do not wait for signs to appear.
Also known as
Toxic principle
Theobromine (a methylxanthine); the principal toxic component of chocolate/cocoa
Possible signs to watch
These are general signs reported in the literature, not a diagnostic checklist. Their absence does not mean an animal is unaffected.
Severity
Severe
Notes
Theobromine is the methylxanthine in chocolate and cocoa responsible for chocolate toxicity (see the chocolate guide); darker and baking chocolate carry more of it than milk chocolate. If exposure is suspected, contact your veterinarian or an animal poison-control line immediately.
Other toxic & harmful substances
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