Comfortis 560mg for Cats 12.1-24 lbs and Dogs 20-40 lbs 1 pill

List Price: $28.34
Sale Price: $18.99
Code: comfortisdogs3
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Comfortis is a beef-flavored chewable tablet that is given once a month. It works to kill fleas and to prevent and treat flea infestations in dogs and cats.


Dogs and Cats(14 weeks of age or older)


  • Starts killing fleas within 30 minutes
  • FDA-approved
  • Lasts a full month
  • Kills fleas before they can lay eggs
  • Comes in a convenient chewable, beef-flavored tablet
  • Spinosad, the active ingredient in Comfortis, is environmentally friendly

How it works

The active ingredient in Comfortis (Spinosad) kills fleas by causing excitation of the insect's nervous system, leading to paralysis and rapid death.


Store in a cool dry place. Keep out of the reach of children.

Comfortis chewable tablets are given orally once a month, at the recommended minimum dosage of 13.5 mg/lb (30 mg/kg).

Recommended Dosage Schedule:

* Dogs over 120 lbs should be administered the appropriate combination of tablets.

Body Weight Spinosad Per Tablet
5 to 10 lbs 140 One
10.1 to 20 lbs 270 One
20.1 to 40 lbs 560 One
40.1 to 60 lbs 810 One
60.1 to 120* lbs 1620 One
Administer Comfortis chewable tablets with food for maximum effectiveness. Comfortis is a chewable tablet and is readily consumed by dogs when offered by the owner just prior to feeding. Alternatively, Comfortis chewable tablets may be offered in food or administered like other tablet medications. Comfortis chewable tablets should be administered at monthly intervals. If vomiting occurs within an hour of administration, redose with another full dose. If a dose is missed, administer COMFORTIS chewable tablets with food and resume a monthly dosing schedule. Treatment with COMFORTIS chewable tablets may begin at any time of the year, preferably starting one month before fleas become active and continuing monthly through the end of flea season. In areas where fleas are common year-round, monthly treatment with COMFORTIS chewable tablets should continue the entire year without interruption. To minimize the likelihood of flea reinfestation, it is important to treat all animals within a household with an approved flea protection product

Possible Side Effects

Side effects may occur, including vomiting. If your pet is experiencing loss of appetite, lethargy, or any other difference in behavior, contact your veterinarian. The FDA has received reports of adverse reactions in dogs receiving the drug Comfortis (spinosad) concurrently with high, extra-label doses of ivermectin. Dogs receiving extra-label doses of ivermectin to treat non-responsive demodectic mange and other conditions have developed signs of ivermectin toxicity. Ivermectin is an ingredient found in heartworm preventatives such as Heartgard Plus, Heartgard, Iverhart Plus and Ivomec. In cats, the most common adverse reaction recorded in clinical trials was vomiting. Other adverse reactions were: lethargy, decreased appetite, weight loss, and diarrhea. Use with caution with concomitant extra-label use of ivermectin.