Wasting Morphine Medication Calculation Problem

  1. 0
    Hey guys I wanted some help with this question: The doctor prescribes 4 mg of I.M. morphine every 3 hours for your patientís pain. The drug is available in a prefilled syringe containing 10 mg of morphine/mL. How many milliliters of morphine should you waste?
    I understand that you should give 0.4mL to the patient but how much do you waste? If anybody could help me understand this part of the question I would really appreciate it. Thanks guys
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  3. 4 Comments so far...

  4. 0
    you would have 0.6ml left
  5. 1
    You didn't say how many mL are in the syringe. Not all concentrations are the same. If this is 10mg/mL, then you would subtract what you give from the total you started with. Whatever is left over is what you waste.

    10 mg/mL, give 0.4, waste 0.6.

    Some prefilled syringes are 4mg/mL, some are 2mg/mL. You have to read the labels very carefully.
    Fiona59 likes this.
  6. 0
    Thanks guys that really helped
  7. 0
    You're welcome, and looking back a 2nd time, ah, you did say per mL. oops.


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