Ivermectin for Cats Ears?

I am wanting to use Ivermectin for my barn cats. I have 12 of them and I noticed they are having serious ear issues. Could you please explain a little better how to mix the solution with mineral oil? I am not understanding the 1% to so many parts. I want to mix a bottle so I can treat them on a regular basis. Can this also be used on the back of the neck for fleas?


By Vickie

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Bronze Answer Medal for All Time! 220 Answers
May 19, 20140 found this helpful

You must know exactly what the the ear problems are to be able to treat them correctly. All 12 may not have the same condition and may require different medications. Some of the cats and kittens may have sensitivities to Ivermectin and this can result in additional medical problems and even death.

Wikipedia Information:
Ivermectin is also used in veterinary medicine. It is sometimes administered in combination with other medications to treat a broad spectrum of animal parasites. Affected animals are particularly sensitive to the toxic effects of ivermectin.[26] Clinical evidence suggests kittens are susceptible to ivermectin toxicity.[27] A 0.01% ivermectin topical preparation for treating ear mites in cats (Acarexx) is available.


Re flea problems, you must be sure that Ivermectin is the proper treatment for fleas before using it for cat fleas. Only a vet can evaluate the cats and suggest the correct flea treatment medication.

Please take your cats to a vet for the correct diagnosis and treatment. Perhaps an examination of one of the cats will help all 12. However, all 12 may not have the same problem.

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January 22, 20181 found this helpful

Go to a non profit pet place in your area. They should sell u revolution bulk tube. It's a back of the neck drop for cats and dogs it kills all. Earmites parasites fleas and heartworms. It's a cats best friend. Never use dog neck treatment on cats but revolution is for cats and dogs dose is different .


All the other back of the neck drops are not like revolution. Dog neck drops will kill cats except revolution is same for cats And dogs but different dose amounts. Revolution cats best friend. Our nonprofit spay nueter place sells me a whole tube $40 treats probably 20 cats

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November 30, 20181 found this helpful

For fleas try mixing 1/2 teaspoon of brewers yeast per cat, into the food daily.
Fleas hate the taste of Thiamine, so jump off the cats.
Ive been doing this for 4 months, and not a flea on my 35 cats. even the cats with flea allergys have no bumps or scabs on the base of the tail.
For worms Im trialing crushed pumpkin seeds. A pinch on the food for 5 days. Repeat every 3 weeks (fleas work off a 3 week cycle)

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November 30, 20180 found this helpful

For fleas try mixing 1/2 teaspoon of brewers yeast per cat, into the food daily.
Fleas hate the taste of Thiamine, so jump off the cats.
Ive been doing this for 4 months, and not a flea on my 35 cats. even the cats with flea allergys have no bumps or scabs on the base of the tail.


For worms Im trialing crushed pumpkin seeds. A pinch on the food for 5 days. Repeat every 3 weeks (fleas work off a 3 week cycle)

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May 29, 20200 found this helpful

I've used Ivomec on cats for years. Stop being a shill.

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August 1, 20210 found this helpful

Check your math before you prescribe.
calsig with healthy cats.

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May 26, 20150 found this helpful

You'll be using your own best judgement, of course, but I had a bottle of 1% Ivermectin. Acarexx is a solution of that in ethyl alcohol - here's their page and the package insert is a PDF right there


I had to use several different types and measurements of syringes (had these for diabetes). You have to be sure you know the meaning of volume for each syringe (See link #1 below). This one was key for me: 1 cc = 1 mL. You will want to check and double check your understanding before proceeding to each next step.

I used this calculator You enter info to 3 of the 4 fields and it calculate the fourth. From top to bottom, looking at the label of the ivermectin that you already have, you know that you enter 1 and click % in the field 'Stock concentration'. Skip the 'Volume from stock' field. 'Final concentration' (to match Acarexx) we want to put .01 and click %. 'Final solution volume' (Acarexx dosage is 0.5mL per ear for cats). You can pre-mix and store if your container has a good seal. For this example, we'll mix up 5.0mL so you enter 5 and leave it on the default mL.


Click 'calculate' and it tells us the answer for 'Volume from stock' - how much of the Stock concentration we'll need.

What you want to do next is not solved for you by this calculator -subtract the number it calculated 'Volume from stock' from the 'Final solution volume'. That's because the final solution volume is just that, the *total* volume.

Here's a working example to mix down 1% ivermectin to a dose to administer topically to cats' ears: 0.05 mL of 1% ivermectin plus 4.95 mL of grain alcohol. Swirl it together for a minute. Draw up 1 mL in a *needleless* syringe or eyedropper-- Half in one ear, Half in the other. Hold your cat's head and massage it around a bit before letting them go. With our example, there is enough for five doses.

Acarexx uses ethyl alcohol as a carrier. I've tried both mineral oil and now ethyl alcohol (use grain alcohol or vodka) and prefer the alcohol. The cats did not continue to be bothered by the sensation of something in their ears they way they were with the oil.

I've dosed them a couple of times over a couple of months and plan to begin doing it monthly during the summer months because of the side benefit of killing any small heartworms--mosquitoes carry the heartworm larvae. It's not widely known but cats can get ill from heartworms that go into their lungs. Ivermectin is known to affect ear mites and various worms including heartworms (link #2 below). BTW, it wasn't proved to me by everything I read online that ivermectin does much for fleas.


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September 16, 20182 found this helpful

alcohol tends to be painful and burn if animal has had mites for extended time. They scratch the inner ear and the mites themselves leave the ears bloody and raw. Mineral oil doesnt burn. while the cats do shake their head because of the oil in their ears ~ at least its not due to pain.

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May 12, 20191 found this helpful

Can never have too much information.
Vets aren't like they used to be.
2 old female cats, head mange.
Do I need to find 27%
I already have 1%
Topically, if so where
SubQ? If so, dose?
I read that it is to be given every other day but for how long I do not know.
Mineral oil dilute for oral or topical
'They' have gotten rid of all the good info online.
Please help.

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December 7, 20190 found this helpful

Your so right about new vets. I would use the pour on just for coverage. 10 percent sulfur soap works fantastic when used on mange . Most new vets just want money and prestige. I pay my vet bills but an exhausted animal rescue group is better at their job than any vet. Your not alone

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August 2, 20210 found this helpful

Your math is from the other side and dangerous to critters when you give out formulas like that. If you want to show off your skills go back to school.

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January 30, 20186 found this helpful

I know this is an old thread but I felt it needed to be stressed that, unless you are treating kittens than it does not need to be diluted- .05ml massaged into each ear of an adult cat is what I understood. Don't listen to the vet snobs, they defeat the purpose of this article entirely. I would recommend you to do some research on this website if you are caring for a lot of cats
(I have 33)
There is a wealth of information there on treating for ear mites, fleas, worms, infections etc. I would also like to add that the Pet Armour she recommends for fleas will also help with ear mites- unless it is a very serious case. Use your best judgement for anything that you read on the internet for treating your animals. Just FYI -I'd like to see somebody wrangle 12 barn cats to the vet. Not to mention what it would cost.

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April 3, 20180 found this helpful

I have a rescue and the vet actually said I could use the ivomec since I have so many cats. However, my question is which one do I buy....the injectable solution or the pour on?

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August 7, 20181 found this helpful

It is the 1% injectable

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January 14, 20191 found this helpful

Is it .05ml per ear,or .10ml per ear,for adult cats?
.10ml is twice the quantity .05ml
I also have a lot of cats. (Rescued,spayed,neutered,indoor). I cleaned everyone's ears yesterday,all have earmites.
I have been intending to retreat w ivermectin,for months,but it is so emotionally draining and traumatic that I treated them once and didn't follow up.
Now Im recommitted to finally getting rid of earmites once and for all.

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April 3, 20191 found this helpful

It is 0.5 ml per ear in an adult cat.

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June 16, 20190 found this helpful

Hi Robyn
In Your most recent answer regarding dose of ivermectin for adult cat you said 0.5ml but previously you said 0.05ml ....can you please clarify. And this is put in undiluted correct

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June 22, 20190 found this helpful

And in the original article it says undiluted 0.1ml in cat ear.
Can someone please confirm dose for undiluted in adult cat ear

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October 3, 20190 found this helpful

Previous reply to a question stated .5ml was correct.. that is not correct. acarexx at .01% is .5 ml per ear so .5ml of the 1% Ivermectin would be way to much. Please make sure you really research how much to give cats bf doing so. Ivermectin injection for cattle is 1ml/110lb.

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December 7, 20190 found this helpful

Fellow rescue and hsus slave. I told my vet all my calculations for ivermectin and earmites. He glared at me and said why all the calculations. Its half an mm in each ear. Its done. You must make sure the mites havent damaged the eardrum first. This is definitely great for ferals. You only get one shot at doing it. Im tired of some vets bull. So is my wonderful veterinarian that doesnt try to be an elitist. Hes there to help animals not talk bull!

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May 16, 20200 found this helpful

I just came across this thread and now it's even older, but when I read the other comment about diluting it I was wondering about it..because the info in the article said it doesn't need to be diluted for adult cats. We have barn cats as well, along with some other strays we look after and you're right - trying to gather up all of them to take to a vet would be a nightmare of a job, plus what it would cost. Trapping them all, over time, to be neutered/spayed was a hard enough job. Then there's buying food and other things that may come up..that alone can really drain the wallet. But again, I know this article is old, so if anyone still reads it..or the author is still answering questions I just want to be sure - it's .05 ml in the ears for adult cats, and it doesn't have to be diluted? Also -I've never tried Pet Armour & curious if it works good for fleas? I've tried some other OTC brands, but a couple of them I can't find anymore and others didn't seem to work too well, so I'm always looking for suggestions.

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October 23, 20210 found this helpful

is it .05ml? or .5ml

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February 17, 20220 found this helpful

I know this is a very old thread, but I too have rescued 12 cats and they all now have ear mites. All of them are over 7lbs so Im wondering why I would need to dilute then turn around have to put 7 drops in each ear. Why couldnt I just put a few drops in each ear? Or which dosage did you find helped? Im no longer seeing ivomec injectable at tractor supply.

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