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Comfortis - Is It Safe


GABBA
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There are several anecdotal reports about the use of Comfortis and vision loss in dogs (reported in the USA) and there is a warning from the manufacturer about its use at the same time as the avermectins.

I was talking to a vet about this recently, there have apparently been a few cases of dogs having "issues" whilst being treated for mange... i.e ivermectin treatment

There is no warning on any Australian packaging, although the company did send out letters to all vets.

The anecdotal reports were dogs presenting with vision loss to specialists in the USA with no history apart from Comfortis use with no added avermectin use. Considering the numbers of dogs using the products the numbers with issues are very low but given the acion of the drug there is potentially some cross over of effect in sensitive dogs.

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I started using it on my bitch about 6 months ago. She had a terrible flea allergy and nothing I did seemed to work. She had lost most of her coat, to the point where I wondered if she had mange. It turned her around! Her coat grew back, she stopped scratching and was looking great again. Then I wanted to put her in pup, so I had to stop using it. Backwards we went once more, with the pups dragging it out of her as well. The pups are now weaned, and she will be going back on it. I gave it to my other dog, who has a food allergy and her coat is looking heaps better too. I am a total convert. I have had no ill effects from it, but I do give it to them at their dinner time. They simply eat it out of my hand before their dinner.

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My beautician recently bought it for her Cattle cross. The dog ended up having a terrible fit and being rushed to an emergency vet. She has recovered and it was thought to be caused by Comfortis because she is 5 and has never had any neuro issues before. It was reported to the manufacturers and they refunded the cost of the pills, not sure about vet bills.

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