Prescription Required
Comfortis® (spinosad) is a fast, safe and effective flea treatment for flea infestations on your dog or cat. It starts killing fleas faster than Nexgard® (afoxolaner) and killed 100% of fleas on dogs and 98% of fleas on cats in just four hours in controlled laboratory studies.
Comfortis is an FDA-approved chewable, beef-flavored tablet that kills fleas and prevents flea infestations on dogs and cats for a full month. Comfortis is:
- CONVENIENT – Easy to give and mess-free.
- FAST – Starts killing fleas in 30 minutes—before they can lay eggs. Comfortis killed 100% of fleas on dogs and 98% of fleas on cats in just four hours in controlled laboratory studies.
- EFFECTIVE – Provides full flea protection for an entire month.
Comfortis is for both dogs and cats. It’s approved for use in cats 14 weeks of age or older and 4.1 pounds of body weight or greater. It’s approved for dogs 14 weeks of age or older and 5.0 pounds of body weight or greater.
Available only if a licensed veterinarian mails, faxes or calls in a prescription.
Not able to ship prescription items to Virginia.
Mailing address: UPCO, P.O. BOX 969, ST. JOSEPH, MO 64502



















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