The most common reason is that the fleas are being killed and the dog is no longer being bitten by them. This can cause the dog to feel itchy and uncomfortable, which may lead to restlessness. Additionally, the chemicals in some flea treatments can be irritating to dogs, leading to discomfort and restlessness.
However, both dogs and cats can have serious adverse reactions to some of these ingredients, even when the product is used according to label directions. Side effects can include skin irritation, agitation or lethargy, vomiting, tremors and seizures.
“Isoxazoline products have been associated with neurologic adverse reactions, including muscle tremors, ataxia and seizures in some dogs and cats,” the FDA added. Ataxia is a lack of muscle control and can cause animals to stumble or twitch.
Additionally, the chemicals in some flea treatments can be irritating to dogs, leading to discomfort and restlessness. Finally, some dogs may experience an allergic reaction to the ingredients in flea medicine, which can also lead to restlessness.
Adverse reactions such as excessive drooling, paw flicking/scratching, and ear twitching are often mild and can go away on their own. Although drooling may recur for several days after use of a flea-control product on an animal, most mild to severe clinical signs resolve within three days.
Pyrethrin/Pyrethroid insecticides (commonly known as “tick medications”) are widely considered safe to use by pet owners, but contain some risks if improperly used. These medications can cause skin irritations, vomiting, along with life-threatening symptoms such as seizures.
I would not expect the lethargy or diarrhea to last more than 12-24 hours.
Dogs that have ataxia may fall, have difficulty walking, walk in circles, or tilt their heads. You may notice that your dog's eyes flutter side to side or up and down. Vestibular ataxia can make your dog feel dizzy and nauseated and may cause vomiting.
The most popular flea and tick medications for dogs and cats last for at least a month; some are even effective for eight to twelve weeks!
The active ingredient in FRONTLINE (fipronil) kills fleas by affecting their nervous system, making them hyperactive before dying. These dying fleas often rise to the top of your pet's haircoat, so the presence of visible fleas after treating your pet, is a sign that the product is working.
If your pet is treated with a suitable flea control product the new adult fleas will usually be killed within 24hrs, this will help control the flea infestation as it will reduce the likelihood of the flea laying eggs and the cycle beginning anew.
If you give your dog or cat the flea and tick preventatives Bravecto, Nexgard, Simparica, or Credelio, the FDA wants you to be aware that these medications may cause neurological issues like stumbling, seizures, and twitching in your pet.
Simparica is an excellent choice for flea and tick protection. The monthly chew also comes with an option for heartworm protection, too, as Simparica Trio. But while Simparica is usually safe flea and tick treatment for dogs, it shouldn't be prescribed to dogs with a history of seizures.
The safety studies for NexGard had a good outcome with a very small percentage of dogs experiencing minor adverse effects. The most frequently reported adverse reaction was vomiting; less frequent reactions included dry skin, diarrhea, lethargy, and anorexia.
Isoxazolines are neurotoxic to more than just insects; they also affect mammals. There is a reason why so many dogs experience seizures, ataxia, and tremors after taking NexGard — the pesticide compromises the dog's central nervous system. Once this happens, there is often no way back.
NexGard (afoxolaner) is for use in dogs only. The most frequently reported adverse reactions include vomiting, itching, lethargy, diarrhea, and lack of appetite.
5. Part your pet's fur. Spot-on flea treatments are only effective when applied directly to your pet's skin, not the surrounding fur. This can be a little tricky with longer-haired species, but it's important you make sure you can see your pet's skin before attempting to apply a spot-on.
A: Nitenpyram products begin killing fleas within 30 minutes of administration. When the fleas begin dying off, the movement of the fleas on the animal can cause a “tickle effect”. Common symptoms of this are vocalization, agitation, scratching or panting.
After your treatment
You must not: enter your home for at least two hours afterwards because the insecticide spray can be harmful to people and pets. clean or vacuum the treated areas for at least 14 days to allow the spray time to work.
Adult fleas will be killed within a few days but the floor should not be vacuumed, swept or washed for at least two weeks after treatment because there will still be eggs which will continue to hatch.
The 48-hour rule also applies to dogs wearing flea and tick collars. Even though most collars are waterproof, they still need the two-day leeway to get proper flea and tick prevention underway.
Out of the ordinary, restless behavior in your dog may indicate some levels of pain, health issues, or anxiety. Most people can determine if the nature of the problem is behavioral or medical. Dogs sometimes develop overly attached bonds to their people, and when you leave your dog, he may become restless.