How long to wait to give Comfortis after last topical flea and last heartworm pill?
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Thread: How long to wait to give Comfortis after last topical flea and last heartworm pill?

  1. #1
    Senior Member AmandaN's Avatar
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    How long to wait to give Comfortis after last topical flea and last heartworm pill?

    Long story short, my crappy neighbors brought home yet another dog (this makes...10-12?) that is infested with fleas. You can literally see them crawling on the dog. Of course, Nola now has fleas. She's allergic to them, and is miserable, itchy and red.

    I've decided to switch her to Comfortis for fleas, but can I give it to her now? Her last topical treatment was on the 1st of this month, and her Heargard+ was given on the 15th. In a perfect world where she didn't have allergies, I would simply wait until August 1st to give her the Comfortis, as I like the spacing of the flea and heartworm prev. But she's so miserable I want to give it to her now. Is that safe? Or should I just wait 9 more days and give it on the 1st like I'd planned?
    If I were to give it now, could I give her neck dose on the 1st of Sept and get her back on the 1st/15th like I like?

    TIA

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  3. #2
    Member beardiedawg's Avatar
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    Re: How long to wait to give Comfortis after last topical flea and last heartworm pil

    Amanda, how long has she had the fleas? I would give her capstar. It kills the fleas immediately and won't overdose her with the other chemicals.

  4. #3
    Senior Member AmandaN's Avatar
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    Re: How long to wait to give Comfortis after last topical flea and last heartworm pil

    Hm...maybe a week or a little more? Won't the Capstar only kill the fleas on her and do nothing about her getting re-infected?

  5. #4
    Senior Member ladyshadowhollyjc's Avatar
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    Re: How long to wait to give Comfortis after last topical flea and last heartworm pil

    It should be fine to give her the Comfortis pill now. Most topicals stay absorbed into the skin glands, while the pill stay in her internal system. When I worked at a vet clinic, we often had clients using a topical in combination with the Comfortis pill (usually for those that lived out in the woods and had a tick problem and used the topical mainly for ticks).

    You can use the capstar and the Comfortis. The capstar will kill all live fleas on her within 30 minutes, but will only stay in her system for about 24 hours.

    I would also suggest having your yard treated for fleas. If your neighbors have such a bad infestation, the Comfortis is not going to be the end all to your problems.

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