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Severity scale:

Mouth or teeth-cleaning products (toothpaste, mouthwash), contain a contamination of rock, soil, and water or from industrial waste or smelting processes. While fluoride is safe for humans and fantastic for your dental health, protecting your teeth against cavities and decay, the same is certainly not true for your pet. Even the smallest ingestion can lead to serious and life-threatening symptoms and warrants an immediate trip the the emergency room.

Other names: 
Mouth or teeth-cleaning products (toothpaste, mouthwash), Colgate, Crest, Scope, Listerine, and many others
Toxic to: 
Dogs and Cats
Severe gastroenteritis, salivation, restlessness, sweating, lack of appetite, refusal to eat, muscle weakness, stiffness, shortness of breath, ventricular tachycardia (rapid heartbeat), and convulsions followed by depression and death within a few hours of ingestion.
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