4 Best Oral Flea and Tick for Cats, According to Vets

Fleas and ticks are a serious health threat to cats, whether your cat is an indoor couch potato, an outdoor explorer, a young kitten, or the senior ruler of your home. Not only are these parasites gross, but they also cause intense skin irritation and can spread infectious diseases that could be dangerous for your cat.

Many cat owners struggle with topical flea and tick treatments due to the greasy residue they leave behind or the cat’s aversion to topical parasite treatments. Oral flea and tick for cats can provide an easy-to-administer alternative to topical treatments, with quick-acting and long-lasting oral medications available. 

We’ll cover why flea and tick prevention is important and provide veterinarian-approved options for the best oral flea and tick prevention for cats.

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Why Flea & Tick Prevention Is Important for Cats 

Consistent, year-round flea and tick prevention is the best way to protect your cat from the health risks that accompany fleas and ticks. 

Health risks to your cat from fleas or ticks include:

• Skin irritation: The bites of these parasites, as well as the cat’s tendency to scratch and bite at them, may lead to skin irritation. 
• Allergic reactions: Some cats develop an allergy to flea saliva, which manifests as flea allergy dermatitis, an intense skin reaction. The cat’s skin will become very red, inflamed, and itchy, with pimple-like bumps. 
• Anemia: Both fleas and ticks consume blood when they bite the cat. With high numbers of these parasites, the cat can become anemic. This is more common in young kittens.
• Infectious disease and parasite transmission: Fleas and ticks can transmit infectious diseases. Cats most commonly get tapeworms from consuming an infected flea when grooming themselves. Fleas can also spread Bartonella henselae (cat scratch fever), which is also a health risk to humans. Ticks can spread diseases like Cytauxzoonosis (bobcat fever), which is often fatal for cats. 

It’s a common misconception that indoor cats don’t need flea prevention. Unfortunately, fleas can still enter the home on your clothing, on other pets, or through open windows and doors. Fleas are the most common external parasite of North American cats, and fleas can live year-round once they get inside your home. 

Pet parents should also note that the active seasons for both fleas and ticks are expanding to include more of the year. Veterinarians are seeing fleas and ticks in all four seasons of the year.

Protecting your cat from fleas with veterinarian-recommended prevention is the best way to safeguard your cat from these parasites. Both topical and oral flea and tick treatments can be great options depending on your preferences. The following are the benefits of oral flea and tick for cats:

• No risk of washing off with grooming or baths
• No greasy residue like topical treatments
• No risk of the preventative getting on children’s hands once administered 
• Easily administered in food or as a flavored chew

What to Look for in the Best Oral Flea and Tick Treatment for Cats 

Currently, most flea and tick preventatives for cats are topical treatments. If you’re interested in oral treatments, you’ll have fewer options to choose from. The following are points to consider when selecting an oral product.

1. Active Ingredients

The active ingredients in currently available oral flea and tick treatments include nitenpyram, spinosad, and lotilaner. Each of these ingredients comes with different risks and benefits.

Nitenpyram is used for immediate relief from fleas. It’s fast-acting, killing 90% of adult fleas within 6 hours of administration. However, it only works against adult fleas and will not break the flea life cycle. It must be given with a preventative to effectively treat the infestation. It’s not intended for treating ticks.

Spinosad kills fleas quickly and prevents flea infestations. This drug lasts up to a month. Like nitenpyram, this drug isn’t intended for use against ticks.

Lotilaner kills fleas, kills black-legged ticks, and prevents infestations with these parasites. While this is a great monthly treatment option for most cats, lotilaner may not be safe for cats with seizures or neurologic disease. 

2. Duration of Effectiveness

Some treatments, like nitenpyram in Capstar or PetArmor CapAction, start working within 30 minutes but don’t have action beyond 24 to 48 hours. These medications need to be given daily to maintain effectiveness.

Other treatments, like spinosad (Comfortis) or lotilaner (Credelio CAT) take a few hours longer to kill fleas but provide protection for a month. These are given monthly.

3. Safety Considerations

You should always choose veterinarian-recommended, FDA-approved options. Some oral flea medications aren’t safe for very small kittens, pregnant cats, or lactating cats. Treatments that include isoxazolines like lotilaner aren’t recommended for cats with seizures or neurologic conditions. Some flavored tablets may not be appropriate for cats with food allergies depending on what ingredients are used for flavoring. 

4. Palatability & Ease of Administration

There are flavored options for oral flea and tick in cats that may be more palatable. However, others may need to be hidden in food. Cats can be quite picky, and smell matters a lot to them, so chewables need to appeal to their noses and their taste buds alike. 

5. Spectrum of Protection

Some oral treatments only target adult fleas, some target fleas but not ticks, and others target both fleas and ticks. You’ll want to ensure you’re selecting products to treat the parasites of concern. Some products may need to be combined with other parasiticides for effective management of parasites in cats. 

The Best Oral Flea and Tick Treatments for Cats 

The following are our veterinarian-approved recommendations for flea and tick treatment and prevention in cats.

Capstar (nitenpyram)

Key Features

• Can be administered to kittens as young as 4 weeks of age and weighing at least 2 lbs
• Starts working within 30 minutes and kills over 90% of fleas within 6 hours
• Does not need to be given with food
• Does not require a prescription
• Can be given as often as once per day

Best For: Immediate Relief from Fleas, Flea Treatment in Young Kittens

Things to Consider

• Only kills adult fleas
• Not effective against ticks
• Only lasts 24 to 48 hours
• Pet would still need flea prevention for effective management of infestation
• Pet parents would need to treat other animals in the home and the environment to break the flea lifecycle
• Side effects, while rare, may include hyperactivity, panting, lethargy, and vomiting 
• May cause birth defects or death in neonates if given to pregnant or lactating animals
• May need to hide in food, as not flavored for palatability

PetArmor CapAction Flea Tablets (nitenpyram)

Key Features

• Same active ingredient as Capstar at a lower price
• Can be administered to kittens as young as 4 weeks of age and weighing at least 2 lbs
• Starts working within 30 minutes and kills over 90% of fleas within 6 hours
• Does not need to be given with food
• Does not require a prescription
• Can be given as often as once per day

Best For: Immediate Relief from Fleas on a Budget

Things to Consider

• Only kills adult fleas
• Not effective against ticks
• Only lasts 24 to 48 hours
• Pet would still need flea prevention for effective management of infestation
• Pet parents would need to treat other animals in the home and the environment to break the flea lifecycle
• Side effects, while rare, may include hyperactivity, panting, lethargy, and vomiting 
• May cause birth defects or death in neonates if given to pregnant or lactating animals
• May need to hide in food, as not flavored for palatability

Credelio CAT (lotilaner)

Key Features

• Can be used in kittens as young as 8 weeks of age and weighing at least 2.0 lbs for the treatment and prevention of flea infestations
• Can be used in cats over 6 months of age and weighing at least 2.0 lbs to treat and prevent black-legged ticks, which are the most prevalent species infesting cats in the United States
• Only FDA-approved oral treatment for ticks in cats
• Begins to kill fleas 6 hours after administration and kills nearly all fleas within 12 hours 
• Only needs to be given monthly
• Is flavored like vanilla and yeast, to be more palatable and to smell pleasing to cats

Best For: Preventing Both Fleas and Ticks in Cats, Preventing Fleas in Kittens, Preventing Fleas and Ticks in Cats with Food Allergies

Things to Consider

• Different ages of approval for fleas versus ticks (8 weeks vs. 6 months)
• Is slower to provide relief than nitenpyram or spinosad
• Safe use of this medication hasn’t been evaluated in breeding, pregnant, or lactating cats.
• Must be given with food
• Most common adverse reactions include weight loss, increased breathing rate, vomiting, diarrhea, and loss of appetite
• Other animals in the home and the home environment will still need to be treated
• Should not be given to cats with a history of seizures or neurologic disease
• Prescription required

Comfortis (spinosad)

Key Features

• Flavored like beef to increase palatability
• Begins working within 30 minutes and kills all fleas within 24 hours of administration
• Only needs to be given monthly
• Can be given as a chewable or within food

Best For: Preventing Fleas Long-Term in Picky Eaters

Things to Consider

• Only approved for use in cats 14 weeks of age or older and weighing at least 4.1 lbs
• Safety hasn’t been evaluated in breeding, pregnant, or lactating cats
• Should be given with food for maximum effectiveness 
• Most common adverse reactions include vomiting, loose stool, lethargy, and decreased appetite
• Other animals in the home and the home environment will still need to be treated
• Does not treat or prevent ticks
• May not be a good option for cats who are allergic to pork or soy, which is what the beef flavor is derived from
• Prescription required

How We Chose the Best Oral Flea and Tick Treatments for Cats 

Our selections include veterinarian-recommended, FDA-approved treatments with positive customer feedback. Among the limited oral flea and tick treatment options for cats, we selected products that could meet a range of needs. We have included oral treatments that provide rapid relief for cats with active flea infestations, as well as medications that are effective long-term preventatives for fleas and ticks. Credelio CAT is currently the only FDA-approved oral flea and tick treatment for cats. 

Final Thoughts on Choosing the Right Oral Flea and Tick Treatment for Your Cat

Your veterinarian is your best source for choosing the best flea and tick prevention for your cat. If your cat has an active flea infestation, your veterinarian will recommend the best flea treatment for cats, in addition to keeping your pet on year-round flea and tick control. 

For best results, year-round control of fleas and ticks is recommended, regardless of whether your cat is indoor or outdoor. Treatment choice should be based on your cat’s health, tolerance for oral medications, and the parasites of concern. 

Always consult with your veterinarian before starting a new flea and tick treatment. If you’re concerned your cat is experiencing side effects from oral flea medicine for cats, make sure to contact your veterinarian. 

Photos by Jonathan Fink on Unsplash and Asique Alam on Unsplash