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  1. #1
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    Sep. 28, 2001
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    Default Gentamicin Dosage IV

    For those of you that have had to give a horse gentamicin IV, how many CCs were you told to give? I am just curious; the dosage on my horse's discharge papers seems really high to me. Thanks!



  2. #2
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    Mar. 8, 2004
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    Baltimore, MD
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  3. #3
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    Default

    Okay so I guess 40 is not so far off for an extra large horse. Thanks!


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  4. #4
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    Aug. 22, 2009
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    Default

    The dose should depend on how big the horse is and what type of infection you are trying to treat. Usually something like 1.5-4 mg/kg/dose and then (at least in humans) we would follow blood levels since too low of a dose doesn't work and too high of a dose can cause kidney failure.



  5. #5
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    Default

    Thanks!



  6. #6
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    Jan. 16, 2002
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    West Coast of Michigan
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    Default

    OMG gentamicin is not something you want to use the "wing it" method to dose! It is weight-based, and the frequency of dosing also depends heavily on how well the kidneys are working. One size does NOT fit all--this is a nasty drug to get wrong.
    Click here before you buy.


    1 members found this post helpful.

  7. #7
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    Mar. 8, 2004
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    Default

    I assume the vet calculated the dosage before writing it on the discharge papers as opposed to winging it and I know my vet calculated the dose when I was told to give 30ccs.



  8. #8
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    Sep. 28, 2001
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    Default

    I am sure it was calculated and re-calculated. I just saw it on the discharge papers after I got home and the vets were gone for the day and I wanted to triple check before giving it to him in the early AM.

    He will only be on it 3 more days then switch to oral meds.

    Thanks for the input!



  9. #9
    Join Date
    Apr. 10, 2008
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    658

    Default

    The most common dose in adult horses is 6.6 mg/kg IV Q24h and the usual concentration is 100 mg/mL.

    So a 1500 lb horse (681 kg) would get 4494 mg / 100 mg/mL = 44 mL

    Your "average (1000 lb)" horse usually gets about 30 mL....



  10. #10
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    Sep. 28, 2001
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    Default

    I would guesstimate his weight to be 1500 lbs. Of course they weighed him before surgery so they knew exactly.

    But that explains why Laurie's horse got 30 ccs and mine got 40.

    Thanks for clearing up!



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