toxic dose is 150 mg/kg. Ibuprofen ( Advil )* can cause gastrointestinal irritation, stomach ulcers, and kidney damage in dogs. Naproxen (Aleve)* has a long half-life in dogs and can cause gastrointestinal irritation, anemia, melena (digested blood in feces), and vomiting. Antifreeze * is very dangerous to dogs and causes central