I gave my 13lb cat the wrong Comfortis dose. Will it kill fleas?

Great question and thank for you for providing the pictures! It is not safe to give your cat the Comfortis in a box that only has a picture of a dog on it. That medication is for dogs only. The box that has both the cat and dog on it means that it is safe to give to cats, and be sure to give your cat the dose according to his weight. I hope this helps :-)

This is an overdose, and you may see signs such as vomiting, diarrhea, nausea, and anorexia. Studies show no permanent damage to cats given an overdose, so that's good news. If you do see any of those signs I mentioned above, have B seen by a vet to be safe. I hope this helps!

Capstar comes in two sizes. Cats should get the 11.4mg. A half dose will work to an extent but will not fully work since the dose is smaller than it should be. Yes, you could give the other half tomorrow but it would be better to give the full amount. The larger size is 57mg and half of that would be an over dose for a cat. I do not recommend to give this to a cat. Also, capstar only lasts 24 hours. I hope this helps and please feel free to post any additional questions.

It is likely to be safe but poorly effective as it would not have enough active ingredients for the size of cat. This would mean you would be undertreating and encouraging drug resistance in fleas (but not reducing the risk of any side effects should they occur). I strongly recommend using the correct size and strength for each cat

Poor Clair! The Comfortis tablet often dissolves quite quickly, but Elanco reps have said that if a cat vomits within an hour of medication administration, the cat should receive another dose. To confirm this information and to report Clair's vomiting, I recommend calling the phone number on the Comfortis packaging.

Comfortis is a prescription product so you will need to see your veterinarian. If you can has been examined within the last year, they may be able to approve the medication for you. You will also need to call your vet for pricing. It's typically cheaper per dose to buy it in a 6 months supply rather than a single dose. Ask if any rebates are currently running as this could help as well. To fully get rid of fleas, you will need to treat all the pets for 6 months. I hope this helps.

Hi there. I think your plan of using Comfortis instead is a good one. If you opt to do this, there's really no need to give the Capstar first, as the Comfortis will start working quickly on its own :) You can go ahead and do this now - the Comfortis should not have any harmful interactions with the Advantage, even if it was only applied a week or so ago.