My Jack Russell ate about 10 tessalon perils. how dangerous is this?

Tessalon Perles (benzonatate) can be dangerous if ingested in large quantities, especially for a small dog like a Jack Russell. The medication is intended for humans and can cause serious side effects in pets, including respiratory distress, lethargy, or even seizures. It's crucial to contact a veterinarian or an emergency animal clinic immediately for advice and possible treatment. Prompt action can help mitigate any potential risks to your dog's health.