Safe, easy flea protection in a monthly, flavored tablet
Save up to $25

Available by prescription from your veterinarian.

Safe, easy flea protection in a monthly, flavored tablet
Save up to $25

Available by prescription from your veterinarian.

Starts killing fleas in just 30 minutes

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Email Reminder

Receive an email or text message reminder from your pet when it's time to administer Comfortis.

Already getting reminders but need to make updates?

Email Reminder

Receive an email or text message reminder from your pet when it's time to administer Comfortis.

Already getting reminders but need to make updates?

Other Products for your Pets

Learn about other pet products 
from Elanco.

Other Products for your Pets

Learn about other pet products 
from Elanco.

Important Safety Information

For 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.

The safe use of Comfortis in breeding, pregnant, or lactating cats has not been evaluated. See Comfortis label for complete safety information.

For dogs: The most common adverse reaction reported is vomiting. Other adverse reactions reported in decreasing order of frequency are: depression/lethargy, decreased appetite, incoordination, diarrhea, itching, trembling, excessive salivation and seizures.

Following concomitant extra-label use of ivermectin with Comfortis, some dogs have experienced the following clinical signs: trembling/twitching, salivation/ drooling, seizures, incoordination, excessive dilation of pupils, blindness and disorientation. Post-approval experience continues to support the safety of Comfortis when used concurrently with heartworm preventatives according to label directions.

Use with caution in breeding females and dogs with pre-existing epilepsy. The safe use of Comfortis in breeding males has not been evaluated.See Comfortis label for complete safety information.

References

1. Dryden, M.W. Host association, on-host longevity and egg production of Ctenocephalides felis, Vet Parasitol 1989; 34:117–122

2. Ipsos Forward Research January 2011: Veterinarians

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