This is by no means a complete list. I will do my best to list all the OTC medications, food, plants and household cleaners I can. If I miss one or you think I have one on the list and are not sure why, feel free to leave a comment. If I’ve made a mistake I will fix it!

The most important link of all. If you think your pet ate something it shouldn’t have, call
ASPCA Poison Control at (888) 426-4435  Immediately.

Over the Counter Medications:

Worst offenders: OTC medications like acetaminophen (ex:. Tylenol), ibuprofen (ex: Advil, Motrin, etc.), naproxen (ex: Aleve, Motrin, etc.), chewable veterinary NSAIDS (ie: carprofen, deracoxib, etc.).

  • Cats have difficulty metabolizing certain drugs, especially as compared to dogs and humans.
  • Common drugs like NSAIDs (non-steroidal anti inflammatory drugs) are some of the most deadly to cats. When ingested, NSAIDs can result in severe kidney failure and stomach ulcers.
  • One acetaminophen tablet can be fatal to a cat, because of the damage it does to red blood cells.

Cats also seem to like the taste of certain antidepressants (ex: Effexor), which have an attractive smell or flavor in the coating. With any accidental medication ingestion, immediate veterinary care is imperative.


Human Foods 

  • Grapes and Raisins. Cats are not likely to eat these, and there are no reports of cats becoming sick from these foods. However, dogs can suffer acute kidney failure from eating grapes or raisins, so it is best to not to risk your cat’s health and not let him eat these foods.
  • Alcohol. It can get your cats drunk but it can also cause severe liver and brain damage. As little as a tablespoon can put an adult cat in a coma; a little more can kill her.
  • Chocolate. The culprit in chocolate that is of most concern is theobromine. It is in all forms of chocolate, and most concentrated in dark chocolate and unsweetened baking chocolate. Consumption can cause heart arrhythmias, muscle tremors, or seizures. Chocolate also contains caffeine.
  • Coffee, Tea, Energy Drinks. These and other caffeinated drinks and foods can cause your cat to become restless, have rapid breathing, heart palpitations, muscle tremors.
  • Dairy Products. Cats can become lactose intolerant when they become adults. If ingested by these cats, dairy products can cause vomiting and diarrhea.
  • Fat Trimmings, Raw Meat, Eggs, Fish. Please consult your veterinarian before adding these foods to your cat’s diet, due to the risk of vomiting, diarrhea, Salmonella or E. coli associated with these foods for some animals, especially when given improperly.
  • Onions and Garlic. All members of the onion family can cause problems if eaten in sufficient quantity. A little bit of onion or garlic in some sauce is not likely to cause any problems. However, eating a clove of garlic or a green onion may cause digestive upset. Eating some type of onion on a regular basis could cause anemia. Baby food made from meat is often seasoned with onion or garlic, so read the labels carefully if you feed these to your cat.
  • Tuna. Tuna, when made into cat food, is perfectly fine for cats. On the other hand, tuna sold for human consumption may cause digestive upset when given as an occasional treat in small amounts. It can even cause a painful condition called steatitis, or inflammation of the body’s fat when fed to cats on a regular basis.
  • Xylitol. This is a sweetener used in a lot of sugar-free foods, especially chewing gum. There are no records of cats becoming ill from this product, but in dogs, it can cause a severe drop in blood sugar followed by liver failure. Therefore it is better to be safe and not let your cat eat foods that contain this ingredient

Plants

The list of plants that are toxic to cats is so extensive, instead of listing them all, I am including a link to the ASPCA’s website. They already have a complete listing!
ASPCA Toxic Plant List Cats

Household Cleaners

Any product containing synphenol such as Pine-Sol or any product containing pine oil is extremely toxic to cats. For a COMPLETE list of all chemicals in and around homes that are toxic cats see this list.  There are just so many chemicals we use every day from cleaning to insecticides and fertilizers…if I named them all it would take me days. The link to that list is the fastest way for you to view them all.