Pharmacology & Dosage
Calculation Methods for
Nursing | Study Guide &
Exam Prep
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,What is the formula to calculate X = (Volume in mL / Time in minutes) x (Drops per
drops per minute for an IV set? mL)
If a patient is to receive 50 mL of an X = (50 mL / 0.5 h) x (60 drops/mL) = 6,000 drops/h
antibiotic over 30 minutes with an IV
set of 60 drops/mL, what is the
delivery speed?
What is the equivalent of 0.05 g of 50 mg
Aldactone in mg?
How many tablets of 25 mg 2 tablets
Aldactone are needed for a 50 mg
dose?
What should be considered before Evaluate if the calculation is reasonable based on
administering tablets to a patient? the patient and medication.
What is the Dimensional Analysis To calculate drug dosages based on available units
Method used for? and desired doses.
What should be done if a patient Consult with a pharmacist about preparing the drug
cannot swallow a tablet? in a liquid form.
, How is the volume of liquid required Using the same methods as for tablets, based on the
for a prescribed dose calculated? concentration of the liquid.
What is the pediatric consideration Children often require different doses than adults
for drug dosing? due to differences in pharmacokinetics.
How is the dose of chlorpromazine 0.55 mg/kg x 22 kg = 12.1 mg, rounded down to 12
calculated for a child weighing 22 kg? mg.
What is the difference between mg/kg/day must be divided by the number of doses
mg/kg/dose and mg/kg/day? required each day.
What are the different routes of drug IV, intramuscular, subcutaneous, oral, rectal, vaginal,
administration? topical, inhalation.
What are the four measuring systems Metric, apothecary, household, and avoirdupois
used in drug preparation? systems.