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Discussion

Dosage Calculations

I am really trying to understand this. I was in class last night, and i understand the method but it is confusing when you have a problem like 1gr/5ml and the physician has orders 500mg??...some please help me...please

  • Quote

    • Featured Replies

    you take the Dr's order of 500mg & divide that into what you have on hand in this case 1g = 1000mg then multiply by 5ml...you would give 2.5mls

    The formula I know is D (doctors order) over H (what you have) x ml

    Hope this helps

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    • Author

    THANKS, Do you use this method on all your calculations?

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    That's the method I use for my calculations as well.

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    • Expert

    [table]

    [tr]

    [td=align: right]http://www.davesems.com/files/drug_dose_calculations.pdf

    dosagehelp.com - helping nursing students learn dosage calculations

    http://www.simetric.co.uk/si_medical.htm\

    1 pound (avoirdupois

    [/td]

    [td=width: 159]dimensional analysis

    great site

    conversions toapothacary

    = 453.592 g

    [/td]

    [td=width: 81, align: right]

    1/2 grain

    [/td]

    [td=width: 100]

    = 30 mg

    [/td]

    [/tr]

    [tr]

    [td=width: 136, align: right]1 pound (apothecary)

    [/td]

    [td=width: 159]= 373.242 g

    [/td]

    [td=width: 81, align: right]1/4 grain

    [/td]

    [td=width: 100]= 15 mg

    [/td]

    [/tr]

    [tr]

    [td=width: 136, align: right]1 ounce (avoirdupois)

    [/td]

    [td=width: 159]= 28.35 g

    [/td]

    [td=width: 81, align: right]1/8 grain

    [/td]

    [td=width: 100]= 8 mg

    [/td]

    [/tr]

    [tr]

    [td=width: 136, align: right]1 ounce (apothecary)

    [/td]

    [td=width: 159]= 31.10 g

    [/td]

    [td=width: 81, align: right]1/12 grain

    [/td]

    [td=width: 100]= 5 mg

    [/td]

    [/tr]

    [tr]

    [td=width: 136, align: right]15 grains

    [/td]

    [td=width: 159]= 1 g

    [/td]

    [td=width: 81, align: right]1/100 grain

    [/td]

    [td=width: 100]= 600 mcg

    [/td]

    [/tr]

    [tr]

    [td=width: 136, align: right]10 grains

    [/td]

    [td=width: 159]= 600 mg

    [/td]

    [td=width: 81, align: right]1/150 grain

    [/td]

    [td=width: 100]= 400 mcg

    [/td]

    [/tr]

    [tr]

    [td=width: 136, align: right]7 1/2 grains

    [/td]

    [td=width: 159]= 500 mg

    [/td]

    [td=width: 81, align: right]1/200 grain

    [/td]

    [td=width: 100]= 300 mcg

    [/td]

    [/tr]

    [tr]

    [td=width: 136, align: right]5 grains

    [/td]

    [td=width: 159]= 300 mg

    [/td]

    [td=width: 81, align: right]1/250 grain

    [/td]

    [td=width: 100]= 250 mcg

    [/td]

    [/tr]

    [tr]

    [td=width: 136, align: right]1 1/2 grains

    [/td]

    [td=width: 159]= 100 mg

    [/td]

    [td=width: 81, align: right]1/300 grain

    [/td]

    [td=width: 100]= 200 mcg

    [/td]

    [/tr]

    [tr]

    [td=width: 136, align: right]1 grain

    [/td]

    [td=width: 159]= 64.79891 mg

    [/td]

    [td=width: 81, align: right]1 kilogram

    [/td]

    [td=width: 100]= 2.2 pounds

    [/td]

    [/tr]

    [tr]

    [td=width: 136, align: right]1 pound

    [/td]

    [td=width: 159]= 0.45 kilograms (kg)

    [/td]

    [td=width: 81, align: right]1 stone

    [/td]

    [td=width: 100]= 6.35 kg

    [/td]

    [/tr]

    [tr]

    [td=width: 136, align: right]1000 mcg

    [/td]

    [td=width: 159]= 300 to 7000 iu (below)

    [/td]

    [td=width: 81, align: right]1000 mcg

    [/td]

    [td=width: 100]= 1 mg

    [/td]

    [/tr]

    [tr]

    [td=width: 136, align: right]1 scruple

    [/td]

    [td=width: 159]= 1.2 g

    [/td]

    [td=width: 81, align: right]1 drachm

    [/td]

    [td=width: 100]

    [/td]

    [/tr]

    [/table]

  • Quote
    • Expert

    Grrrrrrrrr fromatting......click on the links you will find them helpful

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