Comfortis for dogs and cats
A monthly chewable that kills fleas in dogs and cats. [1]
Key facts
| Generic name | Spinosad |
|---|---|
| Common brand names | Comfortis, Trifexis |
| Used in | Dogs & Cats |
| Type | Flea, tick & heartworm |
| Prescription? | Prescription |
| Typical US price | Not listed (no reliable public source) |
What it's used for
A monthly chewable that kills fleas in dogs and cats. [1]
How it works
It overstimulates the flea's nervous system. [1]
Side effects and cautions
Common side effects: Vomiting, low appetite, diarrhea and drooling. [1]
Use with care: Use caution in pets with seizures and pets taking ivermectin at high doses. [1]
Call your vet right away if your pet has trouble breathing, facial swelling, hives, collapse, or any side effect that is severe or getting worse.
What it costs
We don't list a price for this one because we couldn't find a reliable public source. Ask your vet or pharmacy for a quote; prices depend on your pet's size, the dose and where you fill it.
Comfortis FAQ
What is Comfortis used for in dogs and cats?
A monthly chewable that kills fleas in dogs and cats.
What are the side effects of Comfortis?
Vomiting, low appetite, diarrhea and drooling.
Does Comfortis need a prescription?
Yes. It needs a prescription from a veterinarian.
How much Comfortis should I give my pet?
Only your veterinarian can tell you. The right dose depends on your pet's weight, health and other medicines, so we don't list doses. Never give a pet a medicine prescribed for a person or another animal without asking your vet.
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This page is general information for pet owners, not veterinary advice. Talk to your vet about your own pet.