Dog Acting Strange After Flea and Tick Treatment What to Expect

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Posted Oct 23, 2024

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If your dog is acting strange after flea and tick treatment, it's not uncommon. In fact, up to 20% of dogs experience side effects after receiving flea and tick medication.

Some common side effects include vomiting, diarrhea, and lethargy, which can be caused by the active ingredients in the medication. These side effects are usually mild and temporary.

The severity of side effects can vary depending on the type of flea and tick treatment used, as well as the individual dog's sensitivity. For example, topical treatments like fipronil can cause skin irritation in some dogs.

If your dog is experiencing side effects, it's essential to monitor their behavior and watch for any signs of severe reactions, such as difficulty breathing or seizures.

Causes of Weird Behavior

Your dog's weird behavior after flea and tick treatment could be due to a few reasons. The most common reason is that the fleas are being killed and the dog is no longer being bitten by them, leading to itchy and uncomfortable feelings.

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The chemicals in some flea treatments can be irritating to dogs, causing discomfort and restlessness. This is especially true if your dog is sensitive to certain ingredients.

Some dogs may experience an allergic reaction to the ingredients in flea medicine, which can also lead to restlessness. If you notice any signs of an allergic reaction, such as excessive scratching or vomiting, seek veterinary attention immediately.

It's essential to observe your dog closely after flea and tick treatment and consult with a veterinarian if you have any concerns. They can help determine if the restlessness is due to the flea medication or if there is another underlying cause.

If your dog is normally calm and relaxed but becomes restless after using flea medicine, it's worth talking to your veterinarian.

When to Worry About Dog Restlessness

If your dog is normally calm and relaxed but becomes restless after using flea medicine, it's worth talking to your veterinarian. They can help determine if the restlessness is due to the flea medication or if there is another underlying cause.

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Your dog's restlessness after flea medicine could be a sign of an issue, but it's also possible it's just a side effect of the treatment. Consult with a veterinarian to determine the cause.

It's essential to observe your dog closely and consult with a veterinarian if you have any concerns about their behavior after flea treatment. Remember, while some restlessness might not be a severe problem, it's always better to err on the side of caution.

If your veterinarian determines that the restlessness is due to the flea medication, they may be able to recommend a different flea treatment that is less likely to cause restlessness in your dog.

Prevention and Safety

Before giving your dog a flea and tick treatment, it's essential to consult your family veterinarian for the best recommendations for your pet.

They'll help you navigate the available options and ensure you're using a product that's safe for your dog.

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If you're planning to use a flea control product for the first time, be sure to read the label directions carefully and follow them.

To prevent flea control product toxicity, it's crucial to store these products in a secure location away from children and pets.

You should also separate pets in a multi-pet household until the flea control product is dry to prevent them from licking each other.

Don't use flea control products on young puppies or kittens without consulting your veterinarian and reading the label, as most products have a minimum age for use.

If your dog's skin is red, irritated, scratched, or broken, don't apply a topical flea control product until it's fully healed.

Never use more than one flea control product on your dog at a time unless prescribed by your veterinarian.

Here are some key dos and don'ts to keep in mind:

  • Use a veterinarian-prescribed or recommended flea control product.
  • Read label directions carefully and follow them.
  • If a topical product is applied, separate pets in a multi-pet household until the flea control product is dry.
  • Store flea control products in a secure location away from children and pets.
  • Don't use flea control products on or in young puppies or kittens without consulting your veterinarian and reading the label.
  • Don't apply a topical flea control product to skin that's red, irritated, scratched, or broken.
  • Don't use more than one flea control product on your dog at a time unless prescribed by your veterinarian.
  • Don't apply a flea control product for a dog to a cat.

Symptoms and Effects

Symptoms of neurological damage in dogs after flea and tick treatment can include depression, lethargy, convulsions, underactivity, tremors, overactivity, stiffened limbs, and lameness.

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Some dogs may experience skin irritation, including severe itching, bleeding and cracking of the skin, intense redness, blisters, hair loss, and elephantiasis, all of which can appear within two weeks of application.

Adverse reactions to flea control products can also cause headaches, dizziness, nausea, and respiratory tract irritation, and in severe cases, organophosphate toxicity can be rapidly fatal.

Signs of Feline Toxicity

Cats are more sensitive to the toxic effects of pyrethrums and organophosphates than dogs, so use caution when using flea control products on them.

Signs of toxicity from pyrethrum-based flea products can include muscle tremors and excessive salivation.

If your cat is exposed to flea control products containing organophosphates, look out for diarrhea, vomiting, difficulty breathing, small pupils, muscle tremor, weakness or falling over, and drooling.

Organophosphate toxicity can be rapidly fatal, depending on the ingredients and dose the pet is exposed to.

Pet Toxicity Symptoms

Pet toxicity symptoms can be a serious concern for pet owners. If your pet is experiencing flea control product toxicity, it may exhibit symptoms such as muscle tremors, excessive salivation, diarrhea, vomiting, difficulty breathing, small pupils, muscle tremor, weakness or falling over, and drooling.

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Cats are more sensitive to the toxic effects of pyrethrums and organophosphates than dogs, so take extra precautions when using flea control products on felines. Signs of toxicity from pyrethrum-based flea products include muscle tremors and excessive salivation, while signs of toxicity from flea control products containing organophosphates include diarrhea, vomiting, difficulty breathing, small pupils, muscle tremor, weakness or falling over, and drooling.

If your pet is normally calm and relaxed but becomes restless after using flea medicine, it's worth talking to your veterinarian. They can help determine if the restlessness is due to the flea medication or if there is another underlying cause.

If you suspect your pet is experiencing flea product toxicity, it's essential to act quickly. Immediately wash your pet with warm water and a mild dishwashing liquid, such as Dawn, and contact your family veterinarian immediately or bring your pet to the closest MedVet veterinary emergency clinic.

The chemicals in some flea treatments can be irritating to dogs, leading to discomfort and restlessness. If you're concerned about your dog's restlessness after starting a flea treatment regimen, talk to your veterinarian. They can help you determine if the restlessness is due to the flea treatment or if there is another underlying cause.

Acute symptoms of headache, nausea, and abdominal and lumbar pain are associated with carbitol, one of the "inert" ingredients in Frontline.

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Dog Itching Issues

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Some dogs may experience itching after flea treatment due to the killing of fleas and the chemicals in the products, which can be irritating.

Dogs with flea allergy dermatitis can take weeks to resolve their skin reactions.

Flea products can cause severe skin reactions, such as pruritus, bleeding, and cracking of the skin, as seen in Dr. Dee Blanco's case with 20 dogs treated for adverse reactions to Farnam's flea product.

It's essential to consult with your veterinarian if your dog is normally calm but becomes restless after using flea medicine.

Some flea products, like Capstar, can start killing fleas within hours, but only last 24 to 48 hours.

Flea eggs and pupae in the environment can cause ongoing itching issues, even after treatment.

If your dog is still itching after flea treatment, it may be due to an issue with the product or the way you use it, or it could be a sign of an underlying cause that needs to be addressed.

Dogs can experience an allergic reaction to the ingredients in flea medicine, leading to restlessness and itching.

Curious to learn more? Check out: Dog Is Scratching after Flea Treatment

Risk Factors and Alternatives

Credit: youtube.com, Another Toxic Flea and Tick Medicine Causing Seizures

Dogs that are young, old, or suffering from chronic disease are more likely to show immediate signs of reacting to commercial spot-on flea products.

Adult animals and those in the peak of health are less likely to show immediate signs compared to those with a heightened sensitivity to chemicals.

Animals with multiple exposures to pesticides, such as flea collars, yard pesticides, and house termite extermination, are most likely to react.

Dr. Jerry Blondell recommends not using pesticides on the old, the sick, or the young, but many dog guardians and veterinarians overlook this precaution.

Integrated pest management (IPM) is a nontoxic approach to eradicating insect infestations, preserving the quality of life on the planet and within the earth's stratosphere.

The IPM process was initially designed to safeguard all species, including the environment, from the ravages of pesticides.

General Risk Factors

Adult dogs and those in top health are less likely to show immediate signs of reaction to commercial spot-on flea products. Young, old, or animals suffering from chronic disease are more likely to exhibit symptoms.

white Swiss shepherd dog plays in snow on field in winter
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Animals with a heightened sensitivity to chemicals are most at risk. This includes those exposed to multiple sources such as flea collars, other dips, sprays, dust, or flea bombs, yard pesticides, and house termite extermination.

Dr. Jerry Blondell from the US EPA Office of Pesticides advises against using pesticides on old, sick, or young animals. Many dog guardians and veterinarians, however, disregard these precautions.

The cumulative and synergistic impacts of pesticides can take a heavy toll on animals. This is especially true for those with pre-existing health conditions or sensitivities.

Reactivity to chemicals in a population follows a bell-shaped curve. This means that sensitive individuals are at one end, resistant individuals at the opposite end, and the vast middle group shows varying degrees of susceptibility.

Products Aren't Safer

The newest flea products, often referred to as "spot-on" liquids, are being marketed as safe alternatives to their predecessors. Unfortunately, they are simply newer versions of the same toxic chemicals.

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All pesticides pose some degree of health risk to humans and animals, and these spot-on products are no exception. They contain active ingredients like imidacloprid, fipronil, permethrin, methoprene, and pyriproxyfen, which have been linked to serious health effects in laboratory animals.

The public is being misled into thinking that these products are safe, but the fact is, we don't know the full extent of their risks. Eliot Spitzer, Attorney General of the New York Environmental Protection Bureau, says that any decision to use a pesticide is made in ignorance, as we can't make informed individual decisions about the acceptability of those exposures.

Foggers, flea collars, powders, sprays, shampoos, and dips containing organophosphates, pyrethrins, synthetic pyrethroids, and carbamates were once considered cutting-edge solutions to flea problems, but they were eventually removed from the market due to their toxic effects.

Safer Alternatives

Integrated pest management (IPM) is a nontoxic approach used to eradicate any insect infestation.

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IPM is a way of thinking about how to preserve the quality of life on this planet and within the earth’s stratosphere. It's about understanding the damages of pesticides to all species and the environment, as well as the consequences of insect resistance to new pesticide formulas.

The IPM process was initially designed to safeguard all species, including the environment, from the ravages of pesticides. This approach is a safer alternative to traditional methods of pest control.

In the next issue, we will present a complete indoor and outdoor IPM treatment program for effective, non-poisonous flea control. This program will provide a comprehensive guide to managing flea infestations without using toxic chemicals.

By choosing safer alternatives like IPM, you can protect your home, family, and pets from the risks associated with pesticides.

Frequently Asked Questions

Does flea and tick medicine make dogs hyper?

Flea and tick medications can cause hyperactivity in some dogs, but it's essential to note that reactions vary from pet to pet. If you're concerned about your dog's behavior after using flea and tick medicine, consult with your veterinarian for personalized advice.

Edmond Gibson

Lead Writer

Edmond Gibson is a seasoned writer with a passion for crafting informative and engaging content. With a keen interest in the human-animal bond, Edmond has honed his expertise in writing about pets and their well-being. His articles have appeared in various online publications, covering topics such as dog ear surgery and other veterinary-related issues.