Comfortis Flea Control

  • Rapidly kills fleas.
  • For the treatment, prevention and control of flea infestations.
  • For the control of flea allergy dermatitis.
  • Monthly administration. Given with meals.



Style Number: COM-FLE-00001-CONFIG

Product Detail: Comfortis Flea Control

Comfortis Chewable Tablets For Dogs

Comfortis is a once a month oral medication which rapidly kills fleas on dogs. Studies have shown that Comfortis begins to kill fleas within 30 minutes of dosing and is 100% effective within 4 hours.

Comfortis can be used on wet dogs and bathing, swimming and getting wet does not diminish the product's effectiveness.

Comfortis can be used in dogs over 14 weeks of age.

Owners should seek veterinary advice regarding use in pregnant or lactating animals and for use in dogs with pre-existing epilepsy. Safety has not been established in breeding males.

Comfortis can be safely used with topical tick treatments and collars, gastrointestinal worm treatments and heartworm treatments used in accordance to the manufacturer's dosing recommendations.

How to use the product

Comfortis is given orally once per month and the dose is bodyweight dependant.

Comfortis is presented as a chewable tablet so many animals will eat the tablet off the owner's hand. In those animals which refuse to do this normal oral dosing procedure is recommended with the tablet being placed at the back of the oral cavity, the mouth closed and the throat stroked to encourage swallowing.

Comfortis should be given at the time of feeding (with food) for maximal effectiveness.

It is recommended that all animals in the household be treated with an effective flea treatment for maximal flea control to be achieved.


Comfortis is available in 5 different sizes.

Tips and tricks

As dosing is once per month, it is useful to mark the due date on the calendar. Many owners find the 1st of the month a suitable date to choose as it is easy to remember.

Active ingredients

Comfortis contains the active ingredient Spinosad. Spinosad works by causing nerve excitation within the insect's nervous system, leading to muscle contractions, paralysis and death of the target pests.

Contraindications and warnings

There are no known contraindications for Comfortis.

However, veterinary advice should be sought before using in breeding or lactating animals or in animals with pre-existing epilepsy.

Side effects can include, but may not be limited to vomiting, depression/lethargy, anorexia, ataxia, diarrhoea, pruritis (itchy skin), trembling, hypersalivation and seizures. If vomiting occurs within 1 hour of administration, give another full dose.

If a monthly dose is missed, Comfortis should be restarted immediately and the monthly dosing schedule continued from that date.

It's Nice To Know You'll Save More On
Comfortis Flea Control At Trixan Pet Supplies
Item PETstock Petbarn Vet Products Direct Trixan Pet Supplies Savings
Comfortis Chewable Tablets 140mg (Pink 5-10lbs) 12 Pack N/A N/A $114.68 $113.95 $0.73
Comfortis Chewable Tablets 270mg (Orange 10.1-20lbs) 12 Pack N/A N/A $121.96 $120.95 $1.01
Comfortis Chewable Tablets 140mg (Pink 5-10lbs) 6 Pack $0.00 $81.64 $64.20 $63.95 $17.69
Comfortis Chewable Tablets 560mg (Green 20.1-40lbs) 6 Pack $0.00 $89.27 $70.97 $69.95 $19.32
Comfortis Chewable Tablets 1620mg (Brown 60.1-120lbs) 6 Pack $0.00 $95.81 $76.38 $75.95 $19.86
Prices correct as at 1st of each month. Comparison based on prices published online. Comparison excludes cost of shipping, promotions or coupons. Prices subject to change without notice.

Ratings & Reviews

Based on 79 Review(s)

Most Recent Reviews

Comfortis success
Jun 09, 2014

We had tried other flea treatments with varying degrees of success. Having now used Comfortis for 6 months, the flea problem has been eliminated

Jul 08, 2012

I am in total awe of this product, took around a week but the result was amazing, two very happy not chewing at hair dogs, wish I had tried it before it Bear and Harley say thanks Comfortis

Best product ever!
Jan 09, 2012

We have just started using this product & was amazed at how quickly & effiently it worked.Will be recommending it to everyone that we know from now on. :) Harry is just so happy now!!

Finally flea FREE
Jan 08, 2012

We live in an area where sand fleas are tarrible, now we are using comfortis our gorgeous Roxy is flea free!!!! woohoo

Great for scaredy-cats
Jan 07, 2012

My (huge) dog is a huge scaredy cat when it comes to topical medications, and hates having topical flea treatments put on. Comfortis is great, because she gobbles it down without any problems and it's amazingly effective at preventing fleas. Highly recommended!