MEDICAL CALCULATIONS
1) Drug “P” is given at a rate of 1mg/kg. Your patient’s recorded weight is 158
pounds. How much medication will the patient take at every dosage, and how
much will this be in a day if the dosage has to be given 3 times a day?
2) The label of the anti-itch cream “Q” reads 2% of diphenhydramine hydrochloride.
If the net weight of the product is 1 ounce, how many grams of medication does
the whole bottle contain?
3) A label in the bottle of cough syrup “X” states that the active ingredient is
dextromethorphan hydrobromide, and that one teaspoon contains 10 mg of this
ingredient. If the recommended dosage for adults is 3 teaspoons, calculate:
a) the number of ml of cough medicine that will be taken_____________
b) the number of mg of active ingredient that will be taken_____________
c) If the bottle contains 8 fluid oz of medicine, how many mg of active
ingredients are in the bottle?_______________
4) Your patient is on an IV drip to receive fluids and medication. The infusion rate
for the IV setup will deliver 25 drops/minute when fully open. To obtain the
correct dosage of medication, your patient needs 120 ml per hour. Knowing that
there are 5 drops per ml for this IV infusion set, how many drops per minute are
needed to treat your patient?