DOSAGE CALCULATIONS Desired What is the desired (ordered amount)?

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  • DOSAGE CALCULATIONS

    DesiredWhat is the desired(ordered amount)?

  • DOSAGE CALCULATIONS

    HaveWhat do you have(amount on hand)?

  • DOSAGE CALCULATIONS

    VehicleHow is the dosage measured(quantity)?

  • DOSAGE CALCULATIONSDHVDesired over Have times Vehicle

  • DOSAGE CALCULATIONS

    The order readsLasix 20 mg poYou haveLasix 20 mg tabletsHow many tablets will you give?Desired over Have times Vehicle

  • DOSAGE CALCULATIONS20 mg1 tabletDesired over Have times Vehicle20 mg

  • DOSAGE CALCULATIONS20 mg1 tabletThe labels of Desired and Have MUST match20 mg

  • DOSAGE CALCULATIONS20 mg1 tablet20 mgIf the labels match, then they cancel each other out

  • DOSAGE CALCULATIONS201 tablet20Reduce the fraction if possible

  • DOSAGE CALCULATIONS11 tablet1Do the multiplication

  • DOSAGE CALCULATIONS11 tablet = 1 tabletCalculate the Dosage

  • DOSAGE CALCULATIONSGive 1 tabletAmount to Give

  • DOSAGE CALCULATIONS

    The order readsLasix 30 mg poYou haveLasix 20 mg tabletsHow many tablets will you give?Desired over Have times Vehicle

  • DOSAGE CALCULATIONS30 mg1 tabletDesired over Have times Vehicle20 mg

  • DOSAGE CALCULATIONS30 mg1 tabletThe labels of Desired and Have MUST match20 mg

  • DOSAGE CALCULATIONS30 mg1 tabletIf the labels match, then they cancel each other out20 mg

  • DOSAGE CALCULATIONS301 tablet20Reduce the fraction if possible

  • DOSAGE CALCULATIONS31 tablet2Do the multiplication

  • DOSAGE CALCULATIONS11 tablet21Calculate the Dosage

  • DOSAGE CALCULATIONSGive 1Amount to Give12Tablets

  • DOSAGE CALCULATIONS

    The order readsDilantin Suspension 200 mg poYou haveDilantin Suspension 125 mg / 5 mLHow many mL will you give?Desired over Have times Vehicle

  • DOSAGE CALCULATIONS200 mg5 mLDesired over Have times Vehicle125 mg

  • DOSAGE CALCULATIONS200 mgThe labels of Desired and Have MUST match125 mg5 mL

  • DOSAGE CALCULATIONSIf the labels match, then they cancel each other out200 mg125 mg5 mL

  • DOSAGE CALCULATIONS2001255 mLReduce the fraction if possible

  • DOSAGE CALCULATIONS5 mLDo the multiplication85

  • DOSAGE CALCULATIONS811 mLCalculate the Dosage

  • DOSAGE CALCULATIONSGive 8 mLAmount to Give

  • DOSAGE CALCULATIONS

    The order readsMorphine Sulfate gr scYou haveMorphine Sulfate 10 mg / 1 mLHow many mL will you give?Does the dosage need to be converted?

  • DOSAGE CALCULATIONS

    The order readsMorphine Sulfate gr scYou haveMorphine Sulfate 10 mg / 1 mLHow many mL will you give?Caution: The labels MUST match!

  • CONVERSIONSConverting Between the Systems

    Weight

    60 mg = gr i

    The Metric System and the Apothecary System

  • CONVERSIONSSetting Up the Proportion

    Step 1: What DO you know?

    60 mg = 1 grThis is the first part of your proportion

    60 mg : 1 gr :: 45 mg : x gr

  • CONVERSIONSSetting Up the Proportion

    Step 1: What DO you know?

    60 mg = 1 grThis is the first part of your proportion

    60 mg : 1 gr :: 45 mg : x gr

  • CONVERSIONSSetting Up the Proportion

    Step 2: What do you WANT to know?

    x mg = gr This is the second part of your proportion

    60 mg : 1 gr :: x mg : gr

  • CONVERSIONSChecking the Proportion

    Step 3: Are the labels in the same order?

    60 mg : 1 gr :: x mg : gr mg : gr mg : gr

    Caution: Changing the order of the labelswill yield the WRONG ANSWER

  • CONVERSIONSStep 4: Solve the proportion

    60 mg : 1 gr :: x mg : grx = 60 60 4x =x = 15 mgCaution: Dont forget to LABEL your answer

  • CONVERSIONSStep 4: Solve the proportion

    60 mg : 1 gr :: x mg : grx = 60 60 4x =x = 15 mgCaution: Do you have the RIGHT label?

  • DOSAGE CALCULATIONS

    The order readsMorphine Sulfate gr scYou now knowgr = 15 mgYou can convert this order toMorphine Sulfate 15 mg sc

    Look back at the order

  • DOSAGE CALCULATIONS

    The order isMorphine Sulfate 15 mg scYou haveMorphine Sulfate 10 mg / 1 mLHow many mL will you give?Now use Desired over Have times Vehicle

  • DOSAGE CALCULATIONS15 mg1 mLDesired over Have times Vehicle10 mg

  • DOSAGE CALCULATIONS15 mgThe labels of Desired and Have MUST match10 mg1 mL

  • DOSAGE CALCULATIONSIf the labels match, then they cancel each other out15 mg10 mg1 mL

  • DOSAGE CALCULATIONS15101 mLReduce the fraction if possible

  • DOSAGE CALCULATIONS3= 1.52Remember: The metric system uses decimals

  • DOSAGE CALCULATIONS1.5 1 mLDo the multiplication and calculate the dosage

  • DOSAGE CALCULATIONSGive 1.5 mLAmount to Give

  • DOSAGE CALCULATIONS

    The order isMorphine Sulfate 15 mg scYou haveMorphine Sulfate 10 mg / 1 mLYou will give1.5 mL Morphine SulfateLook back to the original order

  • DOSAGE CALCULATIONS

    The order isMorphine Sulfate 15 mg scYou haveMorphine Sulfate 10 mg / 1 mLHow many mL will you give?You can also use the Proportion Method

  • DOSAGE CALCULATIONSUsing the Proportion Method

    Step 1: What do you Have (Label)?

    Morphine Sulfate 10 mg / 1 mLThis is the first part of your proportion

    10 mg : 1 mL :: 45 mg : x gr

  • DOSAGE CALCULATIONSUsing the Proportion Method

    Step 2: What do you Desire (Order)?

    Morphine Sulfate 15 mgThis is the second part of your proportion

    10 mg : 1 mL :: 15 mg : x mL

  • DOSAGE CALCULATIONSUsing the Proportion Method

    Step 3: Are the labels in the same order?

    10 mg : 1 mL :: 15 mg : x mL mg : gr mg : gr

    Caution: Changing the order of the labelswill yield the WRONG ANSWER

  • DOSAGE CALCULATIONSStep 4: Solve the proportion

    10 mg : 1 mL :: 15 mg : x mL15 = 10x1510= xx =Caution: Dont forget to LABEL your answer1.5 mL

  • DOSAGE CALCULATIONSStep 4: Solve the proportion

    10 mg : 1 mL :: 15 mg : x mL15 = 10x1510= xx =Caution: Do you have the RIGHT label?1.5 mL

  • DOSAGE CALCULATIONS

    The order isMorphine Sulfate 15 mg scYou haveMorphine Sulfate 10 mg / 1 mLYou will give1.5 mL Morphine SulfateLook back to the original order

  • DOSAGE CALCULATIONS

    The order readsDilantin Suspension 400 mg poYou haveDilantin Suspension 125 mg / 5 mLHow many mL will you give?Calculate this dose using the D/H * V Method

  • DOSAGE CALCULATIONS

    The order readsDilantin Suspension 400 mg poYou haveDilantin Suspension 125 mg / 5 mLHow many mL will you give?Calculate this dose using the Proportion Method

  • DOSAGE CALCULATIONSDesired over Have times Vehicle or Set up a Proportion

    Its really YOUR Choice