Comfortis (Spinosad)

Rx Prescription Required

Save money on your pets Comfortis prescription with Canadian Pharmacy Online. We offer up to 90% savings compared to your local pharmacy.

Buy Comfortis Online

You can order Comfortis online from our online pharmacy,, if you have a valid prescription from your doctor. You can also order directly from our online pharmacy by selecting your dosage according to the information in your Comfortis prescription or by calling us on 1-800-828-4889. We offer a large selection of Canadian Pharmacy Online.

If you have any questions, our customer service agents can be contacted via live chat and they will provide an instant response to your questions. You can check out how to order section for more information and guidance.

Dosages Available

We provide only the brand Comfortis since there is no generic option of the drug available on the market. Our dosage strengths include 140mg, 270mg, 560mg and 810mg. They are all made by Eli Lilly in a pack of 6 chewtabs.

Comfortis Price

Our online pharmacy provides up to 90% price cut on prescription medications. The difference is clear between the price we charge and what you will spend on the medication at your local drugstore.

For instance, a pack of 6 chewtabs Comfortis will cost only $116.20 on our online pharmacy without a coupon or insurance, which is way below the cost at your local drugstore in the United States. What is more, we will ship to your home for free.

Shipping Time

Your order will be shipped to your home in the United States in 10 to 18 business days. We will send you an email notification once the order is shipped. Shipping is 100% free!

Comfortis Information

Comfortis is a chewable tablet and it is available in five flavored sizes. It is for oral administration and given to puppies and dogs according to their body weights.  The drug is a member of the spinosyns class of insecticides. It is a tricyclic non—antibacterial macrolide. It is used for preventing and treating flea infestation on dogs

Recommended Use

Comfortis is a prescription drug and should be used according to the doctor's prescription. It is to be used orally once a month. The usual dosage is 30 mg per kilogram body weight.  The dog should only be given one tablet and it should be chewed and not swallowed.

Side Effects

Some of the side effects are:

  • Diarrhea
  • Vomiting
  • Lethargy
  • Reduced appetite

You should let your doctor know if you record any of these side effects

The drug should not be given to dogs that have ever been diagnosed with epilepsy. It should also not be given to dogs that have histories of tremors or seizures. The drug should not be given to dogs that are taking ivermectin.


  • You can get a maximum effectiveness form this drug if given together with foods.
  • You should only administer it to the dog once a month.
  • You should give the dog a new dose if vomiting occurs within one hour of administration.
  • The drug is best given during the flea seasons. You can start administering it about a month before the fleas season
  • This drug must never be taken by humans. This drug and all other drugs must be kept out of the reach of children.


Save $10 on your first order!
Enter Canadian Pharmacy Online coupon code CPO10 to save $10 off your order. Minimum $50 order value. *Coupon codes are one-time use and cannot be combined.