Yes, Indian Pink is toxic to dogs!
Dogs accidentally consuming the Indian Pink 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).
Indian Pink consumption is also toxic to Cats and Horses.
Toxic Principles Of Indian Pink: Lobeline.
More Info About The Indian Pink Plant
Scientific Name: Lobelia cardinalis
Family: Campanulaceae.
Also known as: Lobelia, Cardinal Flower.
The answer is based on information found on The American Society for the Prevention of Cruelty to Animals (ASPCA) website.