I saw the thread about cats and plants and it jogged my memory about something I learned about a year ago. Most people know not to give chocolate to dogs because it is toxic but did you know that common medications that we take everyday can cause major problems in our pets? Acetaminophen (Tylenol) for instance, is toxic to cats, and ibuprofen (Advil) can cause kidney failure in dogs. Any of them, also including aspirin and naproxen (Aleve), can cause some problems so it is very important to keep them where animals can't get to them. They can cause ulcers, internal bleeding, cancer (I know everything does) among other problems. Their systems, cats in particular, simply can't process these drugs.