Are You Poisoning Your Pet?

The Toxins in Over the Counter Flea Products

Chris M. Carmichael
Are you poisoning your pet? Flea season is here and there is a strong temptation to wage a full-throttle battle against these pesky creatures. However, before you make a trip to your local supermarket to buy over the counter flea products, consider this:

Many flea collars, powders, and sprays still contain highly toxic organophosphate insecticides, "OP's," and/or carbamates. The adverse, sometimes fatal, reactions pets can have to these products is bad enough but humans exposed to these chemicals are also in danger. People who work with animals ( groomers, shelter workers, are at high risk for related health problems. Children who spend time with pets that have been treated with these flea products are also at great short-term and long-term risk.

According to the National Resource Defense Council (NRDC), children exposed to the organophosphate insecticides found in many OTC flea products can suffer from long term neurological damage and other diseases.

Cats are particularly susceptible to harmful chemicals in flea products. Permethrin, a common ingredient in flea products and other insecticides and acaricides, is a neurotoxin that is highly toxic for cats and should never be used on them or around them. Cats lack enzymes required to mitigate the effects of many substances.

In mixed pet households, dogs should be treated with a flea product that is safe for the cat as well. Even second-hand exposure to permethrin can cause permethrin toxicosis in cats. Signs of permethrin toxicosis include tremors, seizures, lameness, excitability, lethargy and/or vomiting; toxicosis can result in death. Any animal exhibiting signs of poisoning should be treated by a veterinarian immediately.

The NRDC website gives a very good analysis of chemicals and products to steer clear of. The following pesticides are listed on the site and should be avoided whether your pet is a cat or dog.

"A product contains an OP if the ingredient list contains chlorpyrifos, dichlorvos, phosmet, naled, tetrachlorvinphos, diazinon, or malathion. If the ingredient list includes carbaryl or propoxur, the product contains a carbamate."

You can view NRDC's very informative article at: http://www.nrdc.opr/health/effects/pets/execsum.asp

When in doubt, ask your veterinarian. He or she will likely recommend a safer alternative such as Frontline.
You can view my article about frontline here:

There are several flea control products available that are much safer than over the counter flea products. Advantage, Frontline and other flea medicines may cost a bit more, but they are worth it. Reading the labels on flea products before using them on your pet can sometimes mean the difference between life and death.

The information in this article is not intended to take the place of veterinary advice. Please consult a veterinarian if you have questions or concerns regarding flea products.

Published by Chris M. Carmichael

Chris M. Carmichael writes on a wide range of topics and has a broad range of interests (and experience), including Screenwriting, Acting, Forensic Science, Pets, Martial Arts and Abnormal Psychology. Chris...   View profile

13 Comments

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  • J. E. Davidson 9/1/2007

    I have never used flea-killing products that remain on the skin since one of my dogs had a reaction to it. I am also concerned about the effects the poisons my have on my grandchildren. I do use flea shampoo when necessary but am sure to rinse it off thoroughly.

  • Layla Lair 7/29/2007

    This is scary to think about...My cats are like my children.

  • Layla Lair 7/29/2007

    This is scary to think about...My cats are like my children.

  • LaQuisha Hall 7/23/2007

    Good job on your research again! The accompanying picture is extremely eyecatching! I only use Frontline for my cat... Keep writing!

  • Lisa Riggs 7/20/2007

    Great info*Thanks Chris!

  • Charlotte Kuchinsky 7/19/2007

    Thanks for the information.

  • Donna Porter 7/18/2007

    It's amazing what people do - I know when I sold a few kitties I made sure the people had half-a-brain and compassion.

  • Milena Zepeda 7/18/2007

    Thanks for the info! MZ

  • True Ink 7/17/2007

    Thanks for this information. Luckily I use Frontline.

  • Chris M. Carmichael 7/17/2007

    I agree Jan. But some are safer than others and there is no reason to use highly toxic flea products when less toxic flea products exist. And as far as I can tell the two alternatives I listed do not contain ivomectin (though I will double check.) Thank you all for the comments

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