Yes, Epazote is toxic to dogs!
Dogs accidentally consuming the Epazote plants can show the following clinical symptoms: Vomiting, Prolonged Depression, Incoordination, Hypersalivaton, Sleepiness Or Excitation, Dilated Pupils, Low Body Temperature, Low Blood Pressure, Coma, Seizure And Death (In Rare Cases).
Epazote consumption is also toxic to Cats and Horses.
Toxic Principles Of Epazote: Essential oils: ascaridole, limonene, p-cymene.
More Info About The Epazote Plant
Scientific Name: Chenopodium ambrosioides
Family: Chenopodiaceae.
Also known as: Wormseed, Jusuit’s Tea, Mexican Tea, Paico.
The answer is based on information found on The American Society for the Prevention of Cruelty to Animals (ASPCA) website.