It’s not trivial to know what common substances can affect your cat; many of them are not obvious. This information can be crucial, considering the immense curiosity these cats can display a look into diatomaceous earth for fleas on cats.

Your home can be a dangerous place for your cat and it’s entirely your responsibility to create a safe environment for her. Of course, the one presented in this article is not an exhaustive list. We hope it serves to highlight the importance of addressing this issue to prevent accidents that can be fatal.


Take it easy. The most common herbs such as basil, rosemary and dill are safe for cats. Not to mention the favourite catnip.

However, other plants and herbs can adversely affect cats, causing rapid heartbeat, vomiting, diarrhea or even death. These potentially deadly herbs include foxglove, comfrey, aloe, and castor oil.


There are many houseplants that are lethally toxic to cats, including azaleas, lilies and poinsettias. Ingestion of the leaves and berries can cause vomiting, diarrhea and even death.

According to experts, lilies form one of the most common toxicity problems for cats living indoors. The reason? Many people are simply unaware that all parts of a lily (genera Lilium and Hemerocallis) are poisonous to cats. This includes the petals, stamens, and even the water in the vase that holds them. If you have a cat, they cannot have lilies in your house or garden.

Other plants such as peace, pearl and calla lilies do not cause kidney failure. Instead, these plants contain oxalate crystals, which can cause minor symptoms, such as irritation of the mouth, tongue, throat and esophagus.


Caffeine, one of the common substances that can affect your cat
Common substances that can affect your cat include caffeine. There are many ways a cat can find caffeine in a normal home. Caffeine is present in: coffee, tea, soft drinks, energy drinks, weight lifting supplements, various over-the-counter pills and even diet pills.

Caffeine in cats, in moderate amounts, causes life-threatening problems. Its ingestion can cause heart arrhythmia, pancreatic problems, increased blood pressure and organ damage.


Chocolate is among the common substances that can affect your cat
Chocolate contains the theobromine alkaloid, which is toxic to cats. It also contains caffeine and may contain sugar. If your cat eats chocolate, it can cause an abnormal heartbeat, tremors, convulsions and even death. The darker the chocolate, the more dangerous it is to a cat.


Drugs, another common substance that can affect your cat
There are several relatively safe drugs for other animals that are very harmful to cats. This list includes aspirin, acetaminophen, antihistamines, decongestants, ibuprofen, NSAIDs, salicylates, and sodium phosphate enemas.

Nonsteroidal anti-inflammatory drugs (NSAIDs) can cause severe kidney failure and stomach ulcers. Without proper treatment, the consequences can be fatal.

You should always make sure that any medication you’re considering giving your cat is specifically safe for cats. Get advice from your vet before administering any medication on your own. And, of course, always keep the first aid kit locked away somewhere a cat can’t get to it.


Household insecticide poisoning is quite common, also due to improper treatment with a topical medication – intended for use on dogs – to combat fleas and ticks. Exposure to insecticides, such as lawn and garden products, sprays, powders, or pellets, often occurs when a cat walks through a treated area. These cases are usually mild to moderate poisonings.

More severe cases occur from exposure to drugs for canine ectoparasites. These products contain pyrethrins or pyrethroids, which are highly toxic to cats. Commonly, after application, cats may lick themselves or other dogs that live with them.


Pets can be attracted to the curious smell of mothballs. Used carelessly, they pose a hidden threat to a pet’s health.

Inhalation of mothballs vapor causes breathing difficulty, eye irritation and many other symptoms. Ingestion causes intoxication leading to liver damage, respiratory failure, convulsions, cardiac arrhythmia and the possibility of death.

If in doubt, consult your veterinarian or an expert poisoning service. Avoid exposing your cat, save the common substances that can affect your cat and don’t think that just because something seems inaccessible, a cat won’t be able to reach it.

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