℞ Calculating Medication Doses - under construction ℞

By casportpony · Jan 17, 2019 ·
Rating:
4.75/5,
  1. casportpony
    Due to some confusion earlier, I thought I should start this artcile. The drug I am going to use as an example is enrofloxacin and that's because it comes in so many strengths. Yeah, I know it's banned for use in poultry, so let's keep the "no to enrofloxacin comments to a minimum" Those that don't know about the ban should read this:
    https://www.fda.gov/AnimalVeterinary/SafetyHealth/RecallsWithdrawals/ucm042004.htm

    Step One - Figure out what strength the product you have is. Something like enrofloxacin (Baytril) comes in many forms.
    • 10% (100 mg/ml)
    • 5% (50 mg/ml)
    • 2.5% (25 mg/ml)
    • 2.27% (22.7 mg/ml)
    • Custom made by a compounding pharmacy
    Step two
    • Is it an oral or an injectable?
    These are injectables and can be given by injection or orally:
    [​IMG] [​IMG] [​IMG] [​IMG] [​IMG] [​IMG] [​IMG] [​IMG] [​IMG] [​IMG]

    These are oral and should be given orally, never by injection.
    [​IMG] [​IMG] [​IMG] [​IMG]

    Step three - What dose and how to give it.
    • The most common dose seems to be 10 mg/kg *orally* twice a day.
    • One person on BYC reported that their vet prescribed 15 mg/kg twice a day for their goose.
    • Some books say it can be given once a day.
    • Some books say oral (PO), some say injection in the muscle (IM), and some say under the skin (SC or SQ).
    Plumb's:
    [​IMG] [​IMG]

    Clinical Avian Medicine
    [​IMG]

    Avian Medicine: Principles and Applications
    [​IMG]



    Step Four - Weigh your bird. For semi-quiet birds under 5 kg (11 pounds), I use a kitchen scale. For the bigger more squirrely types I use a bathroom scale. To do that weigh yourself first, then weigh yourself hold the bird. The difference between the two numbers is the weight of the bird.

    When I weigh birds I prefer to use the metric system, but if you choose to weigh in pounds just be ready for a little more math.


    Step Five - the math
    If you weighed in pounds:
    The weight of bird in pounds, divide by 2.2 to convert to kilograms, times desired dose (mg/kg), divide by number of milligrams in one ml (mg/ml)

    If you weighed in kg:
    The weight of bird in kg, times desired dose (mg/kg), divide by number of milligrams in one ml (mg/ml)

    If you weighed in grams:
    The weight of bird in grams, times 0.001 convert to kilograms, times desired dose (mg/kg), divide by number of milligrams in one ml (mg/ml)

    Step six - Give the medication.
    • IM - Give in breast muscle. [​IMG]

    • SC or SQ - Give under skin. [​IMG] [​IMG]





    ug = microgram
    mg = milligram
    g = gram
    kg = kilogram
    l = liter
    ml = milliliter

    PO - orally
    IM - Intramuscular injection (injection into muscle)
    SC or SQ - Subcutaneous injection (injection under skin)

    SID - once a day
    BID - twice a day
    TID - three times a day


    mg/ml = milligrams per milliliter
    g/l = grams per liter
    mg/kg = mg per kilogram

    Convert pounds to kilograms - Pounds ÷ 2.2 = kilogram
    Convert kilograms to pounds - Kilograms x 2.2 - pounds

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Recent User Reviews

  1. duxrus
    ""
    5/5, 5 out of 5, reviewed Jan 25, 2019
    Great start!
  2. ChickNanny13
    "Thank you"
    5/5, 5 out of 5, reviewed Jan 17, 2019
    Glad to see this being constructed, thank you ever so much.
  3. MROO
    "Calculating Medication Doses. Good Start!"
    4/5, 4 out of 5, reviewed Jan 17, 2019
    This is clear and pretty easy to follow. Will you be doing separate articles for each med, or editing this one to include others? Either way, your notes on how to weigh your chickens are must-read for anyone dosing their birds. You might consider adding a separate article on just that topic ... short, sweet and dare I say "funny?" Squirrely types, I LOVE it!

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