Comfortis (Spinosad)
Brands: Comfortis
Comfortis is a fast-acting, chewable flea treatment for dogs and cats.
Used for
- flea infestations
- flea allergy dermatitis
How it is given
- Administration
- oral
- Frequency
- once monthly
- Duration
- ongoing as directed
- Storage
- Store at room temperature
- Pregnancy safety
- caution
Always confirm the exact dose with your veterinarian before giving any medicine.
Typical dose ranges
cat
- Standard
- 90 mg to 140 mg
dog
- Large dogs
- 560 mg
- Small dogs
- 140 mg
- Medium dogs
- 270 mg
Ranges are reference only. Your vet sets the dose for your pet's weight and condition.
Active ingredients
- Spinosad
Side effects
Common
- Vomiting
- Lethargy
Rare
- Diarrhea
Severe
- Tremors
Do not use when
- puppies under 14 weeks
- kittens under 14 weeks
Interacts with
- high dose ivermectin
Warnings
- caution in pets with epilepsy
- not for young puppies/kittens
Comfortis (Spinosad) questions
What is Comfortis used for?
Comfortis is used to treat and prevent flea infestations in dogs and cats.
How long does Comfortis take to work?
It begins killing fleas within 30 minutes of administration.
Is Comfortis safe for pregnant pets?
Use with caution in pregnant animals; consult your veterinarian.
Can Comfortis be used with other medications?
Consult your veterinarian for advice on using Comfortis with other treatments.
How is Comfortis administered?
It is given orally, ideally with food.
Full drug detail
Overview
Comfortis (Spinosad) is a fast-acting, oral, chewable tablet for the treatment and prevention of flea infestations in dogs and cats. As a prescription medication, it starts killing fleas in 30 minutes and offers a full month of protection with a single dose.
How It Works
Spinosad, the active ingredient in Comfortis, works by targeting the nervous system of fleas, causing paralysis and rapid death. It is a member of the spinosyns class of insecticides, derived from natural sources.
Uses & Indications
Comfortis is indicated for the prevention and treatment of flea infestations in dogs and cats. It is effective in killing adult fleas and aids in controlling flea allergy dermatitis.
Dosage Guidelines
Dogs
- Small Dogs (5-10 lbs): 140 mg tablet
- Medium Dogs (10.1-20 lbs): 270 mg tablet
- Large Dogs (20.1-40 lbs): 560 mg tablet
Cats
- Standard Dosage: 90 mg tablet for cats 2-4 lbs, 140 mg for cats 4.1-6 lbs
Administration
Comfortis is administered orally, with or after food to enhance absorption.
Frequency
Administer once monthly for effective flea control.
Duration
Continue treatment as directed by your veterinarian, typically year-round for ongoing flea prevention.
Side Effects
Common
- Vomiting
- Lethargy
Rare
- Diarrhea
Severe
- Tremors (requires immediate veterinary attention)
Precautions & Warnings
- Use caution in pets with pre-existing epilepsy.
- Not for use in puppies or kittens under 14 weeks of age.
Drug Interactions
- Avoid concurrent use with ivermectin in high doses.
Storage
Store Comfortis at room temperature, away from moisture and heat.
FAQ
-
What is Comfortis used for? Comfortis is used to treat and prevent flea infestations in dogs and cats.
-
How long does Comfortis take to work? It begins killing fleas within 30 minutes of administration.
-
Is Comfortis safe for pregnant pets? Use with caution in pregnant animals; consult your veterinarian.
-
Can Comfortis be used with other medications? Consult your veterinarian for advice on using Comfortis with other treatments.
-
How is Comfortis administered? It is given orally, ideally with food.